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MPT MUHS Examination Answers - Musculoskeletal & Sports Physiotherapy

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ANSWER 1: Physiotherapy Assessment of Low Back Pain and Differential Diagnosis with Clinical Reasoning (30 Marks - Summer 2023)

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INTRODUCTION

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PART A: PHYSIOTHERAPY ASSESSMENT

I. Subjective Assessment (History Taking)

• Site of pain: localized vs. referred, unilateral vs. bilateral
• Onset: sudden (trauma, disc prolapse) vs. insidious (degenerative, inflammatory)
• Nature: sharp/stabbing (radicular), dull/aching (somatic), burning/shooting (neuropathic)
• Severity: Visual Analogue Scale (VAS), Numerical Pain Rating Scale (NPRS 0-10)
• Radiation: dermatomal pattern (radiculopathy), non-dermatomal (referred somatic pain)
• Duration: acute (<6 weeks), subacute (6-12 weeks), chronic (>12 weeks)
• Aggravating and relieving factors (Table 1 below)
• 24-hour pattern: morning stiffness >1 hour suggests inflammatory; worsening with activity suggests mechanical

• Fear-avoidance beliefs (catastrophizing)
• Low self-efficacy
• Occupational dissatisfaction
• Somatization/depression

• Occupational ergonomics (prolonged sitting, heavy lifting)
• Sports/activity history
• Previous physiotherapy, investigations, surgeries

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II. Objective Assessment

• Standing: hyperlordosis (disc disease), flattened lumbar curve (muscle spasm, ankylosing spondylitis), scoliosis (functional vs. structural), pelvic tilt/obliquity
• Prone/supine: muscle wasting (chronic neurological deficit), skin changes

• Antalgic gait, Trendelenburg gait (gluteus medius weakness - L5 radiculopathy), steppage gait (foot drop - L4/L5)

• Flexion, extension, lateral flexion (L & R), rotation
• Quantified with inclinometry or Schober's test (normal: 5 cm increase from 10 cm above and 5 cm below posterior iliac spine dimples)
• Note: pain arc, deviation, reversal of lumbopelvic rhythm
• McKenzie repeated movement assessment: peripheralization (worsening) vs. centralization (improvement) - directional preference

• Maitland's grading (I-IV) for hypomobility/hypermobility
• PA pressures (central and unilateral) at each lumbar level
• Identifies segmental dysfunction

• Strength testing: hip abductors (L4-L5), quadriceps (L3-L4), tibialis anterior (L4), EHL (L5), gastrocnemius (S1-S2) - graded 0-5 MRC scale
• Core stability: transversus abdominis (TrA) activation assessed by pressure biofeedback (Stabilizer) - normal: 2-4 mmHg increase from baseline of 40 mmHg
• Endurance: Biering-Sorensen test (back extensors), McGill's side bridge endurance test, prone bridge test

• Straight Leg Raise (SLR): normal >70°; positive if reproduces radicular symptoms below knee - sensitivity 91%, specificity 26% for disc herniation (Deville et al.)
• Slump Test (Maitland): more sensitive than SLR for L4-L5 disc herniation; 84% sensitivity
• Femoral Nerve Stretch Test (FNST): upper lumbar (L2, L3, L4) - prone knee bend positive if anterior thigh pain reproduced
• Bowstring test, Well leg raise (crossed SLR - high specificity for disc herniation)

• Spinous processes, interspinous ligaments, paraspinal muscles (spasm, trigger points)
• SIJ, iliac crest, PSIS, ischial tuberosity, piriformis, greater trochanter
• Temperature (warm = inflammatory), tenderness grade I-III

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III. Outcome Measures

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PART B: DIFFERENTIAL DIAGNOSIS AND CLINICAL REASONING

Classification of LBP (Deyo & Weinstein, 2001 - Modified)

1. Specific LBP (~15%) - identifiable pathological cause (infection, fracture, malignancy, spondyloarthropathy, cauda equina)
2. Nerve root pain / Radiculopathy (~5%) - disc herniation, foraminal stenosis
3. Non-specific LBP (~80%) - no identifiable structural cause

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DIFFERENTIAL DIAGNOSES WITH CLINICAL REASONING

• Clinical features: back pain > leg pain (discogenic); leg pain > back pain (herniation); dermatomal radiation; increased with flexion, coughing, Valsalva; SLR positive
• Pathoanatomy: posterolateral herniation at L4-L5 (most common) compresses L5 root; L5-S1 compresses S1 root (Miller's Review of Orthopaedics, 9th Ed)
• Key tests: positive SLR, positive slump test, neurological deficit at specific level
• Imaging: MRI T2 - dark disc, annular tear, nuclear herniation
• Clinical reasoning: Centralization with extension confirms directional preference (McKenzie classification)

• Clinical features: Neurogenic claudication - bilateral leg pain/weakness/heaviness worsened by walking/standing (extension), relieved by sitting/forward flexion (bicycle test positive); wide-based gait; age >50
• Key differentiation from vascular claudication: pain resolves faster with rest in vascular; neurogenic pain relieved by flexion (leaning on shopping cart sign); normal peripheral pulses in neurogenic
• Pathology: central/lateral recess/foraminal narrowing from disc degeneration, osteophytes, ligamentum flavum hypertrophy (Bradley & Daroff's Neurology, p. 3954)
• Diagnostic Criteria: MRI confirms <10 mm AP diameter of canal (absolute stenosis)

• Clinical features: Young athletes (isthmic - stress fracture of pars interarticularis) or older adults (degenerative); painful hyperextension; "step deformity" on palpation; hamstring tightness
• Grading: Meyerding I-IV (25% increments of vertebral body slippage)
• Key test: One-leg hyperextension test (Stork test) - pain ipsilateral to stress fracture

• Clinical features: Unilateral pain below L5, posterior buttock, referred to groin/posterior thigh (not below knee); worse with prolonged sitting, transitional movements; pain localized medial to PSIS
• Key tests: Composite SIJ tests (Thigh Thrust, Compression, Distraction, Gaenslen's, Sacral Thrust) - Laslett's cluster
• Clinical reasoning: SLR negative; no true neurological deficit; FABER reproduces local SIJ pain

• Clinical features: Young males (<40 years); insidious onset; inflammatory pattern (morning stiffness >1 hour, improves with activity); bilateral sacroiliitis; reduced chest expansion; elevated ESR/CRP; HLA-B27 positive
• Assessment: Modified Schober's test <3 cm, Occiput-to-wall >0, Chest expansion <5 cm
• Clinical reasoning: Worsens with rest, improves with movement - opposite to mechanical LBP

• Clinical features: Deep buttock pain, sciatic-like pain (not true radiculopathy); tender piriformis on palpation; positive FAIR test (Flexion, Adduction, Internal Rotation)
• Clinical reasoning: SLR may be mildly positive, but neurological examination normal; SIJ tests negative

• Clinical features: Constant night pain unrelieved by rest; fever; elevated inflammatory markers (ESR, CRP); recent infection/surgery/IV drug use
• Clinical reasoning: Red flag - urgent MRI + blood cultures; not amenable to physiotherapy without medical management

• Kidney (costovertebral angle tenderness, hematuria), pelvic organs (gynecological, prostate), abdominal aortic aneurysm (pulsatile mass, older male, non-mechanical pain)
• Clinical reasoning: Pain unaffected by posture/movement; absence of musculoskeletal signs; refer immediately

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Clinical Reasoning Framework - ICF + Maitland

1. Pathological hypothesis: What structure is at fault?
2. Dysfunction hypothesis: What movement/posture impairment drives symptoms?
3. Severity, irritability, nature (SIN) factor: Guides vigor of examination
4. Mechanism: Trauma, posture, repetitive strain, inflammatory
5. Precautions/contraindications: Red flags, cauda equina
6. Management plan: Problem list → goals → treatment → reassessment

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• Bradley and Daroff's Neurology in Clinical Practice (Table 33.7, Lumbosacral Radiculopathy; p.3954-3960)
• Miller's Review of Orthopaedics, 9th Ed (Lumbar Spine, Section IV)
• Rheumatology, 2-Volume Set 2022, Elsevier (Regional Examination of the Lumbar Spine)
• Maitland's Vertebral Manipulation, 8th Edition (Butler & Gifford)
• Magee DJ, Orthopedic Physical Assessment, 6th Ed
• Jones MA & Rivett DA, Clinical Reasoning for Manual Therapists

• Chys M et al. (2022) - Tailored physiotherapy treatment based on subgroup classification improves outcomes in non-specific LBP (Musculoskeletal Care, PMID 34058064)
• STarT Back Tool validated for risk stratification and matched-care pathways (Hill et al., 2011, Lancet)

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ANSWER 2: Management of Lumbar Stenosis (10 Marks - Summer 2023)

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DEFINITION AND CLASSIFICATION

• Central stenosis: narrowing of the spinal canal (AP diameter <10 mm = absolute stenosis, 10-13 mm = relative)
• Lateral recess stenosis: subarticular zone compression of the traversing nerve root
• Foraminal stenosis: exiting nerve root compression between disc anteriorly and pars/facet posteriorly
• Tandem stenosis: co-existing cervical and lumbar stenosis

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PHYSIOTHERAPY MANAGEMENT

I. Assessment

• Neurogenic claudication: bilateral leg pain/heaviness/weakness provoked by walking/standing (extension), relieved within minutes by sitting/forward flexion
• Bicycle test: symptoms absent during cycling (flexed posture) differentiates from vascular claudication
• Walking test: measure pain-free walking distance and maximum walking distance
• Outcome measures: Zurich Claudication Questionnaire (ZCQ), ODI, NPRS, 6-Minute Walk Test (6MWT), Timed Up and Go (TUG)

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II. Conservative (Physiotherapy) Management

• Explanation of flexion-based relief mechanism (biomechanical rationale)
• Avoidance of prolonged extension activities
• Pacing strategies and activity modification
• Weight management, posture education

• Williams' flexion exercises: posterior pelvic tilt, knee-to-chest, partial sit-ups, hip flexor stretching
• Seated or supine lumbar flexion to open the spinal canal
• Rationale: flexion increases canal diameter, reduces neurogenic claudication

• Exercises in forward-leaned position in warm water
• Reduces compressive load, buoyancy allows higher exercise tolerance
• Effective for patients with poor walking tolerance

• Upright walking in forward-lean posture on treadmill
• Gradually increases walking tolerance
• Evidence: improves walking capacity and quality of life

• TrA and multifidus activation to reduce segmental instability
• McGill's Big Three: curl-up, side bridge, bird-dog
• Reduces load on stenotic segment

• Stationary cycling in flexed posture - excellent cardiovascular exercise without provoking symptoms
• Interval cycling as graded exposure

• Poles encourage forward-leaning posture during walking - improves pain-free walking distance

• Joint mobilization (Maitland Grades I-II) for pain relief and adjacent hypomobile segments
• Soft tissue techniques for paraspinal muscle spasm relief
• Note: manipulation is relatively contraindicated in moderate-to-severe stenosis

• Neural flossing/sliding techniques for symptomatic nerve roots
• Reduces intraneural edema and improves nerve mobility

• TENS (pain modulation via gate control and endogenous opioids)
• Ultrasound (periarticular tissue extensibility)
• Heat therapy (muscle relaxation, circulation)
• Lumbar traction: unloads the disc, increases foraminal dimensions; intermittent traction (50% body weight) preferred

• Lumbar flexion orthosis or corset - maintains slight flexion, reduces extension loading
• Useful for community ambulation

• Progressive increase in activity despite pain (Vlaeyen's model)
• Addresses fear-avoidance and kinesiophobia

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III. Interventional (Non-Surgical) Management

• Epidural steroid injections (ESI): short-term relief (6-8 weeks); evidence moderate; interlaminar or transforaminal approach
• Facet joint injections / medial branch blocks: for facetogenic component
• Interspinous spacer devices (X-STOP): minimally invasive, maintains flexion between spinous processes

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IV. Surgical Management (When Conservative Fails)

• Failure of 6-12 weeks conservative management
• Progressive neurological deficit
• Severe neurogenic claudication limiting daily function
• Cauda equina syndrome (EMERGENCY - immediate decompression)

• Laminectomy + partial medial facetectomy (central stenosis)
• Foraminotomy (foraminal stenosis)
• Decompression + fusion: if instability, spondylolisthesis, scoliosis co-exists (Miller's Review of Orthopaedics)
• Post-surgical physiotherapy: early mobilization, posture, progressive strengthening

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• Ammendolia C et al. (2022, BMJ Open, PMID 35046008) - Systematic review of non-operative treatment for LSS with neurogenic claudication; cycling and walking programs have strongest evidence
• Temporiti F et al. (2022, Eur Spine J, PMID 35511368) - Physiotherapy interventions in LSS; exercise therapy (particularly flexion-based) superior to usual care
• Urata R et al. (2023, J Back Musculoskelet Rehabil, PMID 36911930) - Non-surgical treatment combined with supervised exercise significantly reduces pain and improves function
• Kirker K et al. (2023, Physiother Theory Pract, PMID 34978252) - Comprehensive meta-analysis: rehabilitation including exercise reduces ODI scores and improves walking capacity; surgical outcomes superior at 1 year but converge at 4 years

• Miller's Review of Orthopaedics, 9th Ed (Lumbar Spinal Stenosis, Section IV)
• Bradley and Daroff's Neurology in Clinical Practice (Lumbar Spine Stenosis, p.3954-3960)
• Campbell's Operative Orthopaedics, 15th Ed 2026 (Lumbar Spine)

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ANSWER 3: Evidence-Based Treatment for Groin Soft Tissue Injuries (10 Marks - Summer 2023)

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INTRODUCTION

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CLASSIFICATION (Weir et al., 2015 - Doha Agreement)

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ASSESSMENT

• Mechanism: kicking, cutting, rapid direction change, acceleration (adductor/iliopsoas strain); chronic loading (tendinopathy)
• Location: medial thigh (adductor), anterior hip (iliopsoas), inguinal region
• Aggravating factors: specific movements, sports

• Adductor squeeze test (0°, 45°, 90° hip flexion) - highest sensitivity at 45° for adductor tendinopathy
• FADIR test - hip impingement/labral tear
• Resisted hip flexion test - iliopsoas
• Long lever adductor squeeze test
• Inguinal palpation - sportsman's hernia (site-specific tenderness)
• Pubic palpation - osteitis pubis
• HAGOS (Hip and Groin Outcome Score) - validated outcome measure

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EVIDENCE-BASED TREATMENT

Phase 1: Acute/Subacute (Days 1-14)

• POLICE principle (Protection, Optimal Loading, Ice, Compression, Elevation)
• Rest from aggravating activities (not complete rest)
• Cryotherapy: 15-20 min, 3-4x/day for first 48-72 hours
• Compression shorts/bracing
• NSAIDs (short term, physician prescribed)
• Electrophysical agents: pulsed therapeutic ultrasound (1 MHz, 1.0-1.5 W/cm², 1:4 duty cycle) for tendon healing
• TENS/interferential for pain modulation
• Isometric adductor contractions (sub-maximal, pain-free) - evidence shows isometrics reduce tendon pain and maintain strength without aggravating the tissue (Rio et al., 2015)

Phase 2: Subacute Rehabilitation (Weeks 2-8)

• Eccentric-based adductor strengthening; partner-assisted or with resistance
• Protocol: 3 sets of 6-8 reps, 3x/week, 6-8 weeks
• Evidence: Eirale et al. (2021) - CAE reduced adductor injury rates by 41% in RCT; Harøy et al. (2019, BJSM) - CAE as prevention reduces injury by 31% (Number Needed to Treat = 18 players over one season)

• Isometric → Isotonic (concentric/eccentric) → Functional progression
• Side-lying adduction, ball squeeze, hip adduction machine
• Progress: seated → standing → single-leg stance → dynamic

• Hip adductor stretching (static, dynamic, PNF)
• Hip flexor strengthening: iliopsoas tendinopathy - concentric hip flexion, progressing to eccentric lowering
• Core/lumbopelvic stability: addresses biomechanical drivers - dead-bug, pallof press, Copenhagen plank
• Pelvis/SIJ stabilization: standing hip abduction, clamshell, monster walks
• Adductor-related: standing cable adduction, slide-board training

• Soft tissue release: adductor trigger points, iliopsoas
• Hip joint mobilization if restricted FADIR/FABER
• Active Release Technique (ART) - evidence for myofascial adhesion in chronic groin strains

• Therapeutic ultrasound (continuous, 3 MHz at 1.5-2.0 W/cm²) for deeper tissue (tendon)
• Laser therapy - reduces inflammation, promotes collagen synthesis
• Dry needling (IMS): trigger points in adductor longus, iliopsoas, tensor fascia latae

Phase 3: Functional Return to Sport (Weeks 6-16)

• Pain-free full ROM
• Strength symmetry >90% (limb symmetry index)
• Hop tests: single-leg hop, triple hop >90%
• Adductor squeeze test pain-free
• Agility/change of direction tests

• Linear running → curved running → change of direction → sport-specific drills
• Kicking practice (graded loading)
• Plyometrics: lateral bounds, lateral cuts
• Sport-specific conditioning

• Asymptomatic with sport-specific training for 2 weeks
• Adductor strength >90% contralateral limb on isometric strength testing
• Subjective: HAGOS score within normal limits

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SPECIAL CONDITIONS

• 8-12 week rehab program; pelvic floor strengthening; core stability; avoid impact sports
• Steroid injection if conservative fails

• Core/pelvic floor strengthening; surgical mesh repair if conservative fails >12 weeks

• Eccentric loading: psoas march (standing hip flexion beyond 90°), eccentric hip flexion with load
• Snapping hip (coxa saltans): stretching + strengthening eliminates mechanical snapping

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• Zilles G et al. (2023, Sportverletz Sportschaden, PMID 36878218) - Systematic review: exercise therapy (Copenhagen adductor protocol) is first-line; surgical outcomes for osteitis pubis and sports hernia comparable to conservative at 12 months
• Holmich P et al. - Active physical training more effective than passive treatment for adductor-related groin pain (Lancet 1999 - landmark RCT)
• Harøy J et al. (2019) - Copenhagen Adductor Exercise reduces adductor injury incidence by 31%

• Brukner & Khan's Clinical Sports Medicine, 5th Ed (Groin Injuries)
• Magee DJ, Orthopedic Physical Assessment, 6th Ed
• Doha Agreement, Weir et al. (2015, BJSM) - Classification of groin pain

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ANSWER 4: Pain Assessment, Modulation and Management in Non-Specific Chronic LBP (30 Marks - Winter 2022)

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INTRODUCTION

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PART A: PAIN ASSESSMENT IN NSCLBP

I. Pain Dimensions (IASP - Multidimensional Pain Model)

1. Sensory-discriminative dimension: location, intensity, quality
2. Affective-motivational dimension: unpleasantness, emotional response
3. Cognitive-evaluative dimension: appraisal, meaning, catastrophizing

II. Pain Assessment Tools

• NPRS (0-10): simplest, most commonly used; MCID = 2 points
• VAS (0-100 mm): more sensitive; 10 mm = MCID
• Faces Pain Scale: useful in elderly, low-literacy patients

• McGill Pain Questionnaire (MPQ): 78 descriptors in 4 classes (sensory, affective, evaluative, miscellaneous); PRI (Pain Rating Index) quantifies each dimension; Short-Form MPQ available
• Brief Pain Inventory (BPI): assesses pain intensity AND pain interference with function (activity, mood, sleep, relationships)

• Oswestry Disability Index (ODI): 10 items; 0-100%; gold standard for LBP disability; MCID = 10%
• Roland Morris Disability Questionnaire (RMDQ): 24 items; acute/subacute LBP
• Patient Specific Functional Scale (PSFS): patient-identified functional goals (0-10); MCID = 2 points

• Fear Avoidance Beliefs Questionnaire (FABQ): physical activity and work subscales; scores >15 (work) indicate high fear-avoidance - strong predictor of disability
• Tampa Scale for Kinesiophobia (TSK-17): fear of movement/re-injury; score >37/68 = high kinesiophobia
• Pain Catastrophizing Scale (PCS): rumination, magnification, helplessness; total score >30/52 = clinically significant
• Hospital Anxiety and Depression Scale (HADS): screens comorbid depression/anxiety; >11 = definite
• STarT Back Tool: 9-item screening; stratifies into low (0-3), medium (4+), high risk (4+ with psychosocial component)
• Pain Self-Efficacy Questionnaire (PSEQ): 10 items; MCID = 7 points; higher score = better coping

• Central Sensitization Inventory (CSI): 25 items; score >40/100 suggests central sensitization
• Pressure Pain Threshold (PPT) algometry: widespread hyperalgesia (non-dermatomal pressure pain sensitivity) suggests central sensitization
• Temporal Summation (Wind-up): repeated stimulation at same pressure causes increasing pain response
• Conditioned Pain Modulation (CPM): cold pressor test + pressure pain - reduced CPM efficiency suggests impaired descending inhibition
• Quantitative Sensory Testing (QST): comprehensive sensory profiling (DFNS battery)

• Pittsburgh Sleep Quality Index (PSQI)
• SF-36 / PROMIS

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PART B: PAIN MODULATION IN NSCLBP

I. Neurophysiology of Chronic Pain

• Repeated nociceptive stimulation activates silent C-fiber nociceptors
• Release of inflammatory mediators (bradykinin, substance P, PGE2, NGF) lowers threshold of nociceptors → primary hyperalgesia
• Peripheral sensitization maintains central sensitization in NSCLBP

• NMDA receptor activation by glutamate (excitatory amino acid) and substance P/CGRP
• Long-term potentiation (LTP) in dorsal horn neurons
• Expansion of receptive fields
• Allodynia (pain from non-noxious stimuli) and secondary hyperalgesia (outside injury zone)
• Wide dynamic range (WDR) neuron hyperexcitability
• In NSCLBP: widespread pain, hyperalgesia to pressure on lower extremities, altered temporal summation

• Pro-nociceptive descending facilitation (from rostral ventromedial medulla/RVM) amplifies pain signals - abnormally upregulated in NSCLBP
• Anti-nociceptive descending inhibition (PAG-RVM axis, locus coeruleus - noradrenergic): IMPAIRED in NSCLBP - reduced CPM efficiency
• Endogenous opioids (beta-endorphin, enkephalin, dynorphin) - reduced efficacy in chronic pain
• Serotonin-norepinephrine pathways: basis for SNRI use in NSCLBP

• Aβ fiber activation (touch, vibration, TENS) closes the "gate" in substantia gelatinosa (Rexed's lamina II)
• Basis for: TENS, massage, manual therapy for pain modulation

• Structural: reduced grey matter in prefrontal cortex, anterior cingulate cortex (ACC), insula, thalamus in NSCLBP
• Functional: altered default mode network (DMN) activity; increased pain-related resting state activity
• "Pain neuromatrix" (Melzack): multiple cortical areas process pain experience beyond sensory cortex

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II. Mechanisms of Pain Modulation

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PART C: MANAGEMENT OF NSCLBP

I. Pain Neuroscience Education (PNE / Therapeutic Neuroscience Education - TNE)

• Pain is a protective output of the brain, not just a tissue damage signal
• Chronic pain involves sensitization, not ongoing injury
• Movement is safe and beneficial
• Brain can "learn" to reduce pain (neuroplasticity)

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II. Exercise Therapy

• Targets deep stabilizers: TrA, multifidus, pelvic floor
• Assessment: real-time ultrasound imaging, pressure biofeedback
• Rehabilitation of anticipatory postural adjustments (APAs)
• Protocol: Phase 1 (isolated activation) → Phase 2 (functional integration) → Phase 3 (dynamic loaded tasks)
• Evidence: Richardson, Hodges, Hides (2004) - multifidus atrophy ipsilateral to pain level, responsive to MCE

• Aerobic exercise (walking, cycling, swimming): releases endogenous opioids, normalizes descending modulation, reduces central sensitization
• Dose: 150 min/week moderate intensity aerobic activity (WHO guidelines)
• Yoga: evidence - Cramer et al. (2013) meta-analysis - small to moderate reduction in LBP disability
• Pilates: improves core stability, pain, and function

• Based on operant conditioning (Fordyce model)
• Quota-based progression (not pain-contingent)
• Quota system: baseline + 20% increment each session regardless of pain
• Challenges pain behavior, reduces disability

• For patients with high kinesiophobia (TSK >37)
• Identify feared movements (Fear Avoidance model)
• Hierarchical exposure: systematic desensitization to feared activities
• Evidence level: multiple RCTs showing superiority to graded activity for high-fear patients

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III. Manual Therapy

• Spinal manipulation and mobilization: provide short-term (4-6 weeks) pain relief and disability reduction - Cochrane review 2011
• Mechanism: reflex muscle relaxation, hypoalgesia via descending inhibition, psychological (reassurance), neurophysiological
• HVLA thrust: recommended for acute/subacute; add to exercise for NSCLBP
• Soft tissue techniques: myofascial release, trigger point therapy, massage

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IV. Psychological Interventions

• Addresses maladaptive pain cognitions, behaviors, fear-avoidance
• Components: cognitive restructuring, behavioral activation, relaxation, sleep hygiene
• Evidence: Williams et al. (2012, Cochrane) - CBT reduces pain, disability, catastrophizing in chronic LBP

• Psychological flexibility, acceptance of pain, commitment to valued activities despite pain
• Third-wave CBT, growing evidence in chronic pain

• 8-week program (Kabat-Zinn)
• Evidence: Cherkin et al. (2016, JAMA) - MBSR equivalent to CBT and superior to usual care for NSCLBP at 52 weeks

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V. Interdisciplinary Pain Management

• Combines physical, psychological, occupational therapy, social work
• Most effective for highly disabled chronic LBP patients
• Components: PNE + exercise + CBT + occupational rehabilitation + vocational counseling

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VI. Pharmacological Adjuncts (Physician-Prescribed)

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VII. Emerging/Novel Interventions

• Transcranial Direct Current Stimulation (tDCS): modulates cortical excitability (M1, DLPFC) - shows analgesic effects in NSCLBP
• Graded Motor Imagery (GMI): sequential imagery program (left/right recognition → motor imagery → mirror therapy) - addresses cortical reorganization
• Virtual Reality (VR) therapy: immersive distraction analgesia + biofeedback
• Dry Needling / IMS: trigger point deactivation, reduces central sensitization
• Psychologically Informed Practice (PIP): physiotherapists trained in CBT principles apply them during exercise sessions

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• Butler DS & Moseley GL, Explain Pain, 2nd Ed (Noigroup Publications)
• Nijs J et al. - Central sensitization in musculoskeletal pain
• Brukner & Khan's Clinical Sports Medicine, 5th Ed
• Maitland's Vertebral Manipulation, 8th Ed

• Moseley GL & Butler DS - Explain Pain Supercharged (2017)
• Cherkin DC et al. (2016, JAMA) - MBSR and CBT equally effective for NSCLBP
• Vlaeyen JWS et al. - Graded exposure therapy for NSCLBP (multiple RCTs)

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ANSWER 5: Neural Tissue Mobilisation - Assessment and Treatment Techniques in LBP (30 Marks - Summer 2016)

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INTRODUCTION

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NEURODYNAMICS - CONCEPTUAL BASIS

The Nervous System as a Continuum

• Mechanical interface: surrounding tissues (bony canals, muscles, ligaments) through which the nerve moves
• Neural container (meningeal system): dura, arachnoid, pia mater
• Neural tissue itself: axons, myelin sheaths, endoneurium, perineurium, epineurium
• Intraneural physiology: blood supply (vasa nervorum), axoplasmic transport, nerve fiber function

Neural Tissue Mobility

• Elongation (tensioning): spinal flexion elongates the spinal cord; SLR elongates the sciatic nerve ~12 mm
• Sliding (translation): nerves slide relative to the mechanical interface during limb movements
• Cross-sectional area changes: foraminal dimensions increase 24% in flexion, decrease in extension

• Neuropraxia (1st degree) → Axonotmesis (2nd-3rd degree) → Neurotmesis (4th-5th degree)
• LBP-related neural involvement is usually 1st-2nd degree (reversible)

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PART A: NEURAL TISSUE ASSESSMENT

I. Subjective Assessment

• Sharp, shooting, or burning pain with dermatomal distribution
• Paraesthesia (tingling, numbness) along nerve distribution
• Pain provoked by specific postures involving neural tissue tension (sustained sitting, bending forward)
• Symptoms change with head/neck or distal limb movements (connecting sign - whole body posture affects symptoms)
• Bilateral or multi-level symptoms
• Previous whiplash, disc prolapse, surgery

• Example: SLR to onset of symptoms → add dorsiflexion (increases sciatic nerve tension without changing lumbar position) → if symptoms increase, neural component confirmed

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II. Objective Neurodynamic Assessment Tests

• Patient position: Supine, knee extended
• Examiner action: Passive hip flexion with knee extended
• Normal range: 70-90°
• Positive: Reproduction of radicular pain below knee before 70°; reproduction of posterior leg/back symptoms
• Sensitizing additions (to confirm neural component):
  • Ankle dorsiflexion (increases tibial nerve tension)
  • Hip medial rotation (tibial nerve)
  • Hip adduction
  • Cervical flexion (reproduces symptoms by increasing neural tension from above - Butler's structural differentiation)
• Evidence: Nee RJ et al. (2022, Musculoskelet Sci Pract, PMID 35245880) - Meta-analysis; SLR sensitivity 0.91, specificity 0.26 for lumbar disc herniation; Well Leg Raise (crossed SLR) specificity 0.88, sensitivity 0.29 - high specificity for massive disc herniation
• Structural differentiation: Cervical flexion or ankle dorsiflexion sensitizes the test - if positive, confirms neural tissue

• Patient position: Sitting at edge of plinth, arms behind back
• Sequential loading:
  1. Thoracolumbar flexion (slump)
  2. Cervical flexion
  3. Knee extension (as much as possible)
  4. Ankle dorsiflexion
  5. Release cervical flexion (if symptoms change - structural differentiation positive)
• Positive: Reproduction of patient's symptoms; symptom change with cervical release confirms neural involvement
• Measurement: Record knee extension angle at onset of symptoms bilaterally
• Clinical significance: More sensitive than SLR for L4-L5 disc herniation; detects sciatic nerve involvement in the lumbar, gluteal, and popliteal regions
• Sensitizing factors: Cervical rotation, hip medial rotation

• Patient position: Prone (or side-lying)
• Examiner action: Passive knee flexion + hip extension
• Positive: Reproduction of anterior thigh pain (L2, L3, L4 root tension)
• Sensitizing addition: Hip extension (side-lying position), ipsilateral cervical rotation, ankle plantarflexion
• Structural differentiation: Add cervical flexion or ankle plantarflexion
• Clinical use: Upper lumbar disc herniation (L2-L3, L3-L4), iliopsoas pathology

• Palpate at posterior thigh, popliteal fossa, fibular head for tenderness (intraneural sensitization)
• Increased tenderness compared to contralateral side suggests nerve mechanosensitivity

• Tinel's sign at tarsal tunnel
• Component of lower limb neurodynamic assessment

• ULNT1 (median nerve), ULNT2a (median), ULNT2b (radial), ULNT3 (ulnar)
• Symptoms extending to upper limb with lumbar lesion may indicate widespread central sensitization

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III. Additional Neural Assessment Tools

• Sharp/blunt discrimination, light touch testing along dermatomal bands
• Two-point discrimination (2PD) - assesses cortical representation

• Skin temperature (dorsum of foot), colour (mottling)
• Sweat patterns
• Hair and nail growth changes
• Subtle autonomic signs suggest sympathetically maintained pain

• Sciatic nerve: posterior thigh midline, 1/3 from greater trochanter to biceps femoris tendon
• Compare mechanosensitivity bilaterally

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PART B: NEURAL TISSUE MOBILISATION TECHNIQUES

I. Theoretical Rationale for Neural Mobilisation

1. Axoplasmic transport: restored by improving intraneural circulation (vasa nervorum)
2. Intraneural edema reduction: mechanical "milking" of edema along nerve
3. Adhesion/fibrosis disruption: gentle mobilisation breaks perineural adhesions (especially post-injury or surgery)
4. Mechanosensitivity reduction: reduces AMNS via mechanical desensitization and central inhibitory mechanisms
5. Sliding of nerve relative to mechanical interface: improves nerve bed gliding

II. Types of Neural Mobilisation Techniques

• Technique that produces nerve movement relative to its surrounding mechanical interface without significant change in overall neural tension
• Achieved by: simultaneously increasing tension at one end while decreasing it at the other
• Example (sciatic sliding): SLR + cervical extension (relax proximal tension) while dorsiflexion holds distal tension
• Less irritating, used first in irritable conditions
• Effective for intraneural edema, early post-acute phase

• Technique that increases tension throughout the neural system by increasing neural length
• Achieved by: increasing tension at both ends simultaneously
• Example (sciatic tensioning): SLR + ankle dorsiflexion + cervical flexion
• More aggressive; used for adherent nerves, chronic conditions with established mechanosensitivity
• Not used in acute, highly irritable conditions

• Mobilise the tissue around the nerve (not the nerve itself)
• Example: PA glides at L4-5 to improve foraminal dynamics
• Lumbar traction: opens intervertebral foramina, reduces nerve root compression
• Piriformis release to improve sciatic nerve interface

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III. Specific Neural Tissue Mobilisation Techniques for LBP

• Patient: supine
• Therapist: holds ankle in neutral; passively flexes hip with knee extended to onset of symptoms
• Sliding: simultaneously dorsiflexes ankle (increases distal tension) while allowing slight knee flexion OR adding cervical extension (decreases proximal tension)
• Oscillation: 20-30 repetitions per set, Grade I-II oscillation
• Progression: gradually increase ROM; Grade II-III as symptoms reduce

• Patient: supine
• Passive SLR to onset of symptoms, add ankle dorsiflexion, add cervical flexion
• Sustained hold (30 sec) or oscillation
• Indicated: chronic radiculopathy with reduced SLR, post-disc surgery fibrosis

• Patient: slump position (lumbar, cervical flexion) with knee extended to onset of symptoms
• Sliding: extend cervical spine (decreases proximal tension) while maintaining knee extension
• This technique produces significant sciatic nerve excursion without high tension
• Strong evidence in literature for disc herniation-related sciatica

• Full slump position with dorsiflexion maintained
• Self-administered: patient can perform at home
• Contraindicated in acute disc prolapse with severe radiculopathy

• Patient: prone
• Therapist: passive knee flexion to onset of posterior thigh symptoms
• Add ankle dorsiflexion as sensitizer
• Oscillation in available range

• Patient: prone or side-lying
• Passive knee flexion: onset of anterior thigh symptoms
• Sliding: add plantar flexion (decreases distal tension) while increasing knee flexion
• OR: extend neck (decreases proximal tension) while maintaining knee flexion angle
• For L2-L4 radiculopathy, iliopsoas-related neural involvement

• Slump stretch in sitting: lean forward, extend one knee, add dorsiflexion; hold 10-15 sec or oscillate
• Supine neural flossing: lying supine, flex hip, extend knee to mild tension, add/release cervical flexion alternately (10-20 reps)
• Frequency: 2-3x daily

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IV. Maitland's Graded Oscillation in Neural Mobilisation

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V. Dosage and Precautions

• 3 sets of 10-20 repetitions per session
• 1-3x per day (home program)
• Reassess response after each session: 24-hour rule (symptoms should not be worse next day for >24 hours)

• Highly irritable conditions: use sliding (not tensioning) techniques
• Acute disc herniation with severe neurological deficit: avoid tensioning; gentle sliding only
• Cauda equina syndrome: ABSOLUTE CONTRAINDICATION - emergency neurosurgical referral
• Post-surgical (within 6 weeks): neural sliding only (avoid tensioning over suture lines)
• Inflammatory radiculopathy: wait for acute inflammation to settle before neural tensioning

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VI. Evidence Base for NTM in LBP

• Nee RJ et al. (2022, PMID 35245880): SLR reliability systematic review with meta-analysis - confirms neurodynamic testing is reliable for lumbar radicular pain
• Arslan S & Ülger Ö (2025, Acta Neurol Belg, PMID 40128486): Exercise including neural mobilisation effective for lumbar disc herniation
• Butler DS (1991) - "Mobilisation of the Nervous System" - foundational text
• Coppieters MW & Butler DS (2008, J Biomech) - Neural sliding vs. tensioning: sliding produces greater nerve excursion with less tension; supports clinical use of sliding in early rehab
• Cleland JA et al. - Slump stretching combined with manual therapy improves disability in LBP with radiculopathy (RCT)
• Shacklock M (2005) - "Clinical Neurodynamics" - systematic approach to assessment and treatment

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• Butler DS, Mobilisation of the Nervous System (1991, Churchill Livingstone)
• Shacklock M, Clinical Neurodynamics (2005, Butterworth Heinemann)
• Maitland's Vertebral Manipulation, 8th Ed (Maitland, Hengeveld, Banks, English)
• Coppieters MW, Nee RJ - Neurodynamics evidence
• Magee DJ, Orthopedic Physical Assessment, 6th Ed (Special Tests chapter)
• Bradley and Daroff's Neurology in Clinical Practice (Table 33.7 - Lumbosacral Radiculopathy)

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SUMMARY TABLE FOR QUICK REVISION

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Examiner's Tip for 30-Mark Questions: Structure your answer with clear headings (Assessment framework → Objective examination → Clinical reasoning → Differential diagnoses). Use tables for nerve root levels and clinical features. Always include outcome measures and red flag screening. For management questions: use Phase I/II/III progression with evidence citations. Recent PubMed evidence cited improves scores significantly.All five MPT MUHS topper-level answers are ready above. Here's a quick guide to what each contains:

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What's Covered (Quick Reference)

Q1 - LBP Assessment + Differential Diagnosis (30M)

• Full subjective assessment framework (red flags, yellow flags, SIN factors)
• Complete objective examination: AROM, PIVM, neurological exam (nerve root table L2-S1), special tests (SLR, Slump, FABER, SIJ cluster), outcome measures table
• 8 differential diagnoses with clinical reasoning: disc herniation, stenosis, spondylolisthesis, SIJ dysfunction, ankylosing spondylitis, piriformis syndrome, spinal infection, visceral referred pain
• Hypothetico-deductive clinical reasoning framework

Q2 - Lumbar Stenosis Management (10M)

• Classification (central/lateral/foraminal), pathomechanics (Kirkaldy-Willis cascade)
• Full conservative physiotherapy: flexion exercises, aquatic therapy, BWSTT, core stabilization, Nordic walking, manual therapy, TENS, traction
• Interventional and surgical indications
• 4 recent systematic reviews cited (Ammendolia 2022, Temporiti 2022, Urata 2023, Kirker 2023)

Q3 - Groin Soft Tissue Injuries (10M)

• Doha Agreement classification, phased rehabilitation (POLICE → Copenhagen Adductor Exercise → return-to-sport criteria)
• Evidence-based protocols: Holmich's protocol, CAE, criteria-based RTS
• Special conditions: osteitis pubis, athletic pubalgia, iliopsoas tendinopathy

Q4 - NSCLBP Pain Assessment, Modulation & Management (30M)

• Multidimensional pain assessment: VAS, MPQ, BPI, ODI, FABQ, TSK, PCS, CSI, CPM, QST
• Pain neuroscience: peripheral sensitization, central sensitization, descending modulation, gate control, brain neuroplasticity
• Full management: PNE, motor control exercise, graded activity, graded exposure, CBT, ACT, MBSR, tDCS, GMI

Q5 - Neural Tissue Mobilisation (30M)

• Butler's nervous system continuum, Sunderland's nerve injury classification
• Full assessment: SLR with structural differentiation, Slump test, FNST, sympathetic assessment
• Sliding vs. tensioning techniques with specific protocols for supine/seated/prone
• Maitland grading for neural mobilisation, dosage, precautions
• Key evidence: Nee et al. 2022 meta-analysis (SLR reliability), Coppieters & Butler (sliding vs. tensioning biomechanics)

MPT MUHS Examination Answers - Orthoses and Splints

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ANSWER 1: Role of Orthosis for Spinal Movement Dysfunctions Under Conservative Care (10 Marks - Summer 2022)

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DEFINITION

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AIMS OF SPINAL ORTHOSIS IN CONSERVATIVE CARE

1. Immobilization / Restriction of motion - protect injured structures, allow healing
2. Pain relief - reduce biomechanical load on pain-sensitive structures; warmth effect; proprioceptive input
3. Deformity correction - apply corrective forces (three-point pressure principle) to reduce or halt curve progression
4. Postural control and spinal stabilization - support weak musculature; increase intra-abdominal pressure (IAP) to unload spine
5. Protection post-surgery - maintain surgical correction during healing
6. Proprioceptive feedback / Postural awareness - reminder to avoid extreme positions

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CLASSIFICATION OF SPINAL ORTHOSES

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ROLE IN SPECIFIC SPINAL MOVEMENT DYSFUNCTIONS

1. Low Back Pain (LBP)

• Intra-abdominal pressure (IAP) mechanism: corsets compress the abdomen, increasing IAP which converts the trunk into a rigid cylinder, reducing compressive loads on lumbar discs and facet joints by up to 30% (Morris, Lucas & Bresler, 1961)
• Restriction of lumbar flexion/extension: reduces mechanical provocation of injured discs or facet joints
• Thermal effect: warmth from the orthosis increases local blood flow, reduces muscle spasm
• Proprioceptive feedback: reduces fear-avoidance by providing postural cues

• Soft lumbar corset / support belt: flexible, allows limited motion; used for non-specific LBP, discogenic pain; worn for short periods (prevents abdominal muscle atrophy with prolonged use)
• Rigid LSO (Chairback orthosis / Knight brace): anterior and posterior uprights with lateral panels; restricts lumbar flexion-extension; for lumbar fractures, post-surgical recovery, disc prolapse
• Lumbosacral corset with steel stays: semi-rigid support; for chronic LBP, lumbar instability
• TLSO: for thoracolumbar fractures, spondylolisthesis

• Acute LBP: short-term (2-4 weeks) rigid orthosis for pain relief; corset during acute phase
• Spondylolisthesis: LSO to limit flexion-extension, reducing shear at the isthmic defect; worn 3-6 months
• Post-discectomy/fusion: rigid TLSO/LSO for 6-12 weeks post-surgery
• Caution: prolonged use (>3 months) leads to paraspinal muscle atrophy and psychological dependency

2. Scoliosis (Idiopathic)

• Curve 25-40° (Cobb angle) in a skeletally immature patient (Risser stage 0-2)
• Documented progression of ≥5° or initial curve >25° at presentation

• Milwaukee brace (CTLSO): for thoracic curves with apex above T8; neck ring + pelvic girdle + lateral thoracic pad; applies three-point corrective pressure; uncomfortable, poor compliance (rarely used now)
• Boston TLSO (underarm brace): prefabricated, trimmed to custom fit; curves with apex at T8 or below; most commonly used
• Charleston Nighttime Brace: worn only during sleep; hypercorrected position; compliance is better
• Providence brace: custom nighttime orthosis; overcorrects curve by lateral bending; for single lumbar/thoracolumbar curves
• Chêneau brace / Rigo-Chêneau (3D brace): asymmetric TLSO with expansion chambers and pressure zones for 3D correction; evidence supports curve correction >50% in compliant patients

• Effectiveness is dose-dependent: worn >13 hours/day = 90% efficacy in preventing surgical threshold (Weinstein et al., BRAIST trial, NEJM 2013)
• Miller's Review of Orthopaedics (9th Ed): "Bracing has been shown to be less effective in boys and overweight patients"

3. Cervical Spine Dysfunctions

• Acute whiplash: soft collar (reminder device + proprioceptive input) for 1-2 weeks; longer immobilization NOT recommended (active treatment superior - WAD guidelines)
• Cervical disc prolapse / radiculopathy: soft/semi-rigid collar for 2-4 weeks for pain relief; reduces cervical compressive load; combined with traction and exercise
• Cervical spondylotic myelopathy (CSM): rigid collar post-operatively; stabilizes during neural tissue healing
• Post-surgical: Philadelphia/Miami J for 6-12 weeks post-ACDF

4. Thoracic Spine (Kyphosis)

• Milwaukee brace / CTLSO: Scheuermann's kyphosis in adolescents; three-point pressure over thoracic kyphosis apex
• Jewett hyperextension orthosis (TLS): three anterior pads (sternal, pubic, upper thoracic) + posterior lumbar pad; restricts flexion and facilitates extension; used for stable thoracic/thoracolumbar compression fractures; does not control rotation
• Taylor brace (TLSO): two posterior uprights, abdominal support; for mid-thoracic lesions; restricts flexion
• Knight-Taylor brace: combines Knight (LSO) + Taylor (TLSO); controls all planes including rotation in the thoracolumbar junction

5. Spondylolisthesis / Lumbar Instability

• Rigid LSO with anti-lordosis padding: reduces anterior shear at slipped level
• Lumbosacral fusion orthosis post-operatively

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PRINCIPLES OF APPLICATION (Conservative Management)

1. Prescription: by physiotherapist/orthopaedist based on diagnosis, segment involved, deformity type
2. Fitting: orthotist fabricates/fits; physiotherapist supervises; skin inspection for pressure areas
3. Wearing schedule: gradual increase; typically worn during activity, removed for sleep (unless nighttime brace)
4. Skin care: inspect for pressure sores over bony prominences; wear cotton undergarment
5. Exercises: must accompany orthosis use; prevent muscle atrophy (core strengthening, postural exercises)
6. Weaning: gradual reduction in wearing time as symptoms improve; avoid sudden discontinuation
7. Reassessment: 4-6 weekly; X-ray to assess correction (scoliosis); functional reassessment (LBP)

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• Rockwood and Green's Fractures in Adults, 10th Ed 2025 (Cervical Orthoses, p.3144-3154)
• Miller's Review of Orthopaedics, 9th Ed (Bracing for Scoliosis)
• Bradley and Daroff's Neurology in Clinical Practice (Orthotists and Bracing)
• Lusardi MM, Jorge M, Nielsen CC - Orthotics and Prosthetics in Rehabilitation, 3rd Ed

• Weinstein SL et al. (BRAIST Trial, NEJM 2013): bracing significantly decreases progression to surgical threshold in adolescent idiopathic scoliosis (success rate 72% brace vs. 48% observation)
• NICE guidelines (2016): lumbar supports recommended short-term for acute LBP; not for prevention of LBP in healthy workers

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ANSWER 2: Knee Assessment for Prescription of Orthosis in Functional Valgus + Description of Orthosis (10 Marks - Winter 2022)

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PART A: KNEE ASSESSMENT FOR FUNCTIONAL VALGUS

Definition

• Medial compartment knee OA with varus malalignment (valgus-producing unloader brace)
• Medial collateral ligament (MCL) insufficiency causing valgus instability
• Dynamic valgus collapse causing patellofemoral pain syndrome (PFPS)
• Post-ACL reconstruction with valgus instability
• Genu valgum in children (corrective orthosis)

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Assessment Framework for Orthosis Prescription

• Pain location: medial/lateral/peripatellar/diffuse
• Mechanism: activity-related, landing from heights, cutting sports
• Duration, aggravating/relieving factors
• Functional limitations: stair climbing, squatting, running
• Previous orthoses, braces tried
• Outcome measures: KOOS (Knee injury and Osteoarthritis Outcome Score), WOMAC, NPRS

1. Tibiofemoral angle (Q angle of lower limb): measured in standing; >7° = pathological valgus
2. Q angle: ASIS to patella center to tibial tuberosity; normal 15-18° (females) / 10-15° (males); elevated in functional valgus/PFPS
3. Navicular drop test: assesses foot pronation (associated with functional valgus)
4. Genu valgum measure: intermalleolar distance when knees touching; >10 cm = significant valgus
5. Medial joint line gapping: X-ray weight-bearing AP view; Kellgren-Lawrence grading of OA; joint space narrowing pattern (medial = varus; lateral = valgus)
6. Mechanical axis: measured on long-leg standing radiograph (hip-knee-ankle); normal = passes through knee center; displaced medially = valgus

1. Valgus stress test (MCL):
   • Patient: supine, knee at 0° and 30° flexion
   • Apply valgus force; assess medial gapping
   • 0°: tests posteromedial capsule + MCL
   • 30°: isolated MCL test
   • Grading: Grade I (<5 mm), Grade II (5-10 mm), Grade III (>10 mm) medial gapping
2. Dial test: tibial external rotation at 30° and 90° to rule out posterolateral corner injury (associated with valgus instability)
3. Posterior/Anterior drawer, Lachman: assess cruciate integrity (functional valgus can occur with ACL laxity)

• Patient: single-leg squat to 60° knee flexion
• Observe: knee-over-toe angle, hip adduction, contralateral pelvic drop (Trendelenburg)
• Positive for functional valgus: ipsilateral knee collapses medially (IPEAK criteria: Ip/IP angle)
• Rating: Good/Moderate/Poor alignment (Ireland 2003)

• Patient: drop from 30 cm box, land on both feet, immediately jump vertically
• Record with 2D video from front: measure knee valgus angle at landing
• Positive: >10° valgus on landing = dynamic valgus (high ACL injury risk predictor - Hewett et al. 2005)
• Also observe: peak knee valgus moment (PKVm) - strongest predictor of ACL injury

• Both arms elevated, squat to parallel
• Identifies: knee caving (functional valgus), foot pronation, trunk lean

• Scores 0-3; score of 1 or asymmetry indicates movement dysfunction contributing to valgus

• Hip abductors (gluteus medius) - key driver of functional valgus; measured with HHD; deficit >15% side-to-side predicts valgus collapse
• Hip external rotators - weakness allows femoral internal rotation (increases valgus moment)
• Quadriceps: VMO:VL ratio by EMG or clinical assessment; VMO weakness associated with PFPS
• Foot intrinsics and plantarflexors: foot pronation control

• Patellar mobility: medial-lateral glide, tilt, rotation
• Clarke's test / Patellar grind test
• J-sign: patellar lateral maltracking with extension

• Assess for peripheral vascular disease (orthosis contraindicated in severe PVD)
• Skin integrity: edema, wounds, bony prominences

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PART B: ORTHOSES FOR FUNCTIONAL VALGUS

1. Valgus-Producing (Unloading) Knee Orthosis (for medial compartment OA with varus malalignment)

• Three-point pressure system: one pad on the medial femoral condyle + one on the lateral proximal tibia + one counter-force on lateral distal femur
• This creates a valgus moment at the knee
• Examples: OA Adjuster 3 (Össur), GII Unloader (Breg), Unloader One (Össur), DonJoy OA Adjuster
• Materials: lightweight carbon fiber frame, soft textile interface, condylar pads
• Dynamic hinge allows flexion-extension while maintaining valgus correction

• Alfatafta et al. (2021, BMC Musculoskelet Disord, PMID 34384421): Systematic review - valgus knee brace significantly reduces pain and improves activity in medial compartment knee OA at 3-month and 6-month intervals
• Hall M et al. (2022, PMID 35657960): RCT - valgus brace reduces medial tibiofemoral joint contact force in varus-malaligned knees
• Stam M et al. (2025, Acta Orthop, PMID 39832288): RCT - unloader brace comparable to high tibial osteotomy in younger patients with medial knee OA at 2-year follow-up

2. MCL Support Orthosis (for valgus instability from MCL injury)

• Hinged knee brace with medial buttress
• Dual-axis polycentric hinge; adjustable range of motion stop
• Medial upright reinforced; lateral pad provides valgus counter-force
• Examples: DonJoy Armor Fource Point, Bledsoe Axiom, Townsend Rebel
• Custom vs. off-the-shelf (custom preferred for Grade III MCL)

3. Patellofemoral Orthosis (for dynamic valgus causing PFPS)

• Patellar sleeve/strap: neoprene sleeve with patellar cutout + medial patellar pad; recenters patella; reduces peripatellar pain by 40% (Powers et al.)
• Counterforce strap (Cho-Pat): infrapatellar strap; reduces patellar tendon tension
• McConnell taping (not an orthosis but functional equivalent): medial glide + tilt correction of patella; provides proprioceptive input; used during rehabilitation exercises

4. Foot Orthosis for Functional Valgus

• Medial arch support / anti-pronation orthosis: corrects subtalar pronation which drives tibial internal rotation and functional knee valgus
• Custom semi-rigid insole with medial wedge (pronation correction)
• Evidence: Eng & Pierrynowski (1993) - foot orthoses reduce frontal plane knee kinematics in PFPS

5. KAFO (Knee-Ankle-Foot Orthosis) for Fixed Genu Valgum

• For structural valgum in children (ages 2-3 years with progressive deformity)
• Controls tibiofemoral alignment, prevents further valgus progression
• Campbell's Operative Orthopaedics (15th Ed): "observation or bracing with a knee-ankle-foot orthosis may be indicated for children between ages 2 and 3 years, but progressive deformity in children older than 3 years warrants surgical intervention"

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• Miller's Review of Orthopaedics, 9th Ed (Orthosis table; KAFO)
• Campbell's Operative Orthopaedics, 15th Ed 2026 (KAFO for valgus)
• Bradley and Daroff's Neurology in Clinical Practice (Orthotists and Bracing)
• Lusardi MM - Orthotics and Prosthetics in Rehabilitation, 3rd Ed

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ANSWER 3: Spinal Orthosis for Lumbar Spine (10 Marks - Summer 2021)

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INTRODUCTION

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BIOMECHANICAL EFFECTS OF LUMBAR ORTHOSES

1. Restriction of motion: flexion (primary), extension (secondary), lateral bending; rotation least controlled
2. Increase intra-abdominal pressure (IAP): compresses abdominal wall, transforming trunk into a rigid cylinder; unloads lumbar disc and facet joints by up to 30-40%
3. Reduction of paraspinal muscle activity: EMG studies show reduction in erector spinae activity with rigid braces (mechanism: reduction of load-bearing demand)
4. Thermal effect: warmth from brace material increases local circulation, reduces muscle spasm
5. Proprioceptive facilitation: sensorimotor feedback from brace to trunk; helps normalize motor control

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CLASSIFICATION AND TYPES OF LUMBAR ORTHOSES

A. Flexible Lumbar Orthoses (Corsets / Support Belts)

• Fabric (canvas/elastic) with posterior steel stays
• Extends from lower thorax to sacrum
• Controls flexion and lateral bending (not rotation)
• Indications: non-specific chronic LBP, discogenic pain, muscle strain, post-partum low back pain, occupational use
• Limitations: minimal immobilization; provides support and proprioceptive feedback mainly

• Narrow belt worn over iliac crests and greater trochanters
• Compresses SIJ, reduces anterior pelvic rotation and pubic symphysis gap
• Indications: SIJ dysfunction, peripartum pelvic girdle pain, pubic symphysis instability
• Evidence: Wu et al. (2008) - SIJ belt significantly reduces posterior pelvic pain provocation test pain in pregnancy

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B. Semi-rigid Lumbar Orthoses

• Two rigid posterior uprights + two lateral uprights + abdominal apron
• Controls flexion and extension in mid-lumbar region
• Indications: lumbar disc herniation, lumbar instability, acute LBP with nerve root involvement
• Contact points: posterior uprights on paraspinals; lateral uprights on iliac crests; abdominal apron increases IAP

• Restricts lumbar extension, allows flexion
• Lateral uprights connected posteriorly but open anteriorly
• Indications: lumbar stenosis (extension-aggravated); facetogenic LBP; spondylolysis (restricts extension which opens pars defect)

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C. Rigid Lumbar Orthoses (TLSO)

• Custom-molded thermoplastic shell
• Maximum lumbar immobilization
• Indications: unstable lumbar fractures (conservative management), post-fusion surgery, spondylolisthesis Grade II+

• Three-point system: sternal pad + pubic pad (anterior) + posterior lumbar pad
• Restricts flexion, allows extension (hyperextension device)
• Indications: stable thoracolumbar compression fractures (anterior wedge fractures); NOT for burst fractures
• Contraindications: posterior element fractures, instability, burst fractures

• Single cross-shaped anterior component with sternal and pubic pads
• Similar function to Jewett but less comfortable; better for lighter patients
• Indications: same as Jewett brace

• Two posterior paraspinal uprights + interscapular strap + axillary slings + abdominal support
• Controls thoracic and lumbar flexion
• Indications: thoracolumbar junction fractures, thoracic kyphosis

• Combines Knight LSO + Taylor TLSO features
• Controls all planes including partial rotation
• Indications: unstable thoracolumbar fractures, post-surgical, polytrauma

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INDICATIONS SUMMARY TABLE

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CONTRAINDICATIONS AND COMPLICATIONS

• Skin conditions, pressure ulcers over contact areas
• Severe respiratory compromise (abdominal compression raises diaphragm)
• Suspected cauda equina syndrome (requires urgent surgery, not conservative bracing)
• Osteoporosis with vertebral fracture requiring surgical stabilization

• Paraspinal muscle atrophy and weakness (dependency)
• Skin pressure sores at bony prominences
• Reduced respiratory function (rigid thoracic components)
• Psychological dependency
• Sweating, skin maceration

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• Rockwood & Green's Fractures in Adults, 10th Ed 2025 (Orthoses section)
• Miller's Review of Orthopaedics, 9th Ed
• Lusardi MM, Orthotics and Prosthetics in Rehabilitation, 3rd Ed (Spinal Orthoses chapter)
• Norkin CC & Levangie PK, Joint Structure and Function, 5th Ed

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ANSWER 4: Principles of Spinal Orthoses (10 Marks - Summer 2021)

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INTRODUCTION

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PRINCIPLE 1: THREE-POINT PRESSURE SYSTEM

• One force (corrective force) is applied at the apex of the deformity or motion segment
• Two counter-forces (reaction forces) are applied on the opposite side at points above and below the corrective force
• This creates a bending moment that opposes the deformity or restricts motion

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PRINCIPLE 2: INTRA-ABDOMINAL PRESSURE (IAP) MECHANISM

• Abdominal compression by the orthosis converts the trunk into a closed hydraulic cylinder
• Increased IAP creates an upward hydraulic force on the diaphragm, resisting spinal compression
• IAP elevation can reduce lumbar disc compressive load by 20-30%
• This mechanism is responsible for the pain-relieving effect of lumbar corsets and supports

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PRINCIPLE 3: PASSIVE STIFFNESS / RESTRICTION OF MOTION

• Rigid spinal orthoses (TLSO, halo vest) provide passive mechanical resistance to motion at spinal segments
• The orthosis acts as an external mechanical interface reducing angular displacement at the motion segment
• Never completely eliminates motion: cervical collars limit 45-75% of motion depending on level; halo vests limit ~90%
• Restriction is greatest at mid-segment; least at terminal segments of the orthosis (end-level phenomenon)

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PRINCIPLE 4: DEFORMITY CORRECTION / ANTI-DEFORMITY FORCES

• Orthosis must exert a corrective force exceeding the deforming force at the apex
• For scoliosis: lateral pressure pads create a transverse corrective force in the frontal plane; derotation pads for the axial component; expansion zones opposite pressure pads allow the spine to move into the corrected position
• Effectiveness is proportional to curve flexibility (flexible curves respond better than rigid)
• For kyphosis: hyperextension orthosis prevents flexion, allowing posterior ligament healing while maintaining correction

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PRINCIPLE 5: IMMOBILIZATION FOR HEALING

• After spinal fracture or surgery, the orthosis maintains the spine in a corrected, stable position while osseous or ligamentous healing occurs
• Time to bony union: 6-12 weeks (fracture); 12-24 weeks (spinal fusion)
• The orthosis supplements internal fixation, not replaces it
• Rigid orthoses allow early mobilization without compromising healing

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PRINCIPLE 6: PROPRIOCEPTION AND NEUROMUSCULAR CONTROL

• Cutaneous mechanoreceptors (Ruffini, Meissner, Pacinian corpuscles) in the skin under the orthosis are stimulated, providing proprioceptive feedback to the CNS
• Improves postural awareness and motor patterns (postural control hypothesis)
• Reduces fear-avoidance and kinesiophobia
• This is the primary mechanism of soft collars and corsets (not mechanical restriction)

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PRINCIPLE 7: UNLOADING / FORCE REDISTRIBUTION

• Spinal orthoses can redirect forces from injured structures to uninjured ones
• Example: Jewett brace transfers load from anterior vertebral body (fractured) to posterior elements via hyperextension positioning
• Unloader braces redistribute joint contact forces from one compartment to another
• Traction-orthosis (cervical traction collar) can distract facet joints, relieving compression

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PRINCIPLE 8: THERMAL EFFECT

• Many orthoses (especially soft corsets, neoprene supports) retain body heat at the spine
• Heat increases local blood flow, reduces muscle spasm, increases tissue extensibility
• Minor contribution; primarily enhances patient comfort and pain reduction

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PRINCIPLES OF PRESCRIPTION (Biomechanical Rules)

1. Define the goal first: immobilization vs. correction vs. support vs. proprioception
2. Identify the segment to be controlled: determines orthosis level (CO, LSO, TLSO etc.)
3. Select the appropriate rigidity: deformity correction and fracture management require rigid; pain management may use flexible
4. Apply three-point pressure correctly: pad placement is critical; improper placement = ineffective orthosis
5. Minimize skin pressure: pressure relief cutouts over bony prominences; padded interfaces
6. Combine with exercise: orthosis alone causes muscle atrophy; must be paired with active strengthening
7. Monitor and reassess: 4-6 weekly clinical and radiological assessment

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• Rockwood & Green's Fractures in Adults, 10th Ed 2025 (TPP - cervical orthoses)
• Lusardi MM, Orthotics and Prosthetics in Rehabilitation, 3rd Ed
• Miller's Review of Orthopaedics, 9th Ed
• Perry J, Burnfield JM - Gait Analysis: Normal and Pathological Function

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ANSWER 5: Hand Splints (10 Marks - Summer 2017)

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INTRODUCTION

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TERMINOLOGY (ISO 8549 / ASHT Splint Classification System)

• Static splint: holds joint in a fixed position; no moveable parts; used for rest, immobilization
• Dynamic splint: has moveable components (springs, rubber bands, elastic); applies low-load prolonged stretch to improve ROM; for contractures, tendon repairs
• Static progressive splint: incrementally adjusted static position to gain ROM; uses inelastic components
• Serial casting / serial static splinting: progressively corrected positions of casting/splinting

• Wrist orthosis (WO)
• Wrist-hand orthosis (WHO)
• Wrist-hand-finger orthosis (WHFO)
• Finger orthosis (FO)

• Volar (palmar) - supports palmar surface, most common
• Dorsal - pressure-sensitive palmar conditions
• Circumferential - maximum support

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CLASSIFICATION AND DESCRIPTION OF HAND SPLINTS

A. WRIST SPLINTS

• Positions wrist at 10-30° extension (functional position)
• Covers palmar surface from distal forearm to metacarpal heads
• Indications: carpal tunnel syndrome (nocturnal use), wrist sprains, Colles fracture (post-cast), de Quervain's tenosynovitis, wrist tendinitis, radial nerve palsy
• Materials: thermoplastic (Orfit, Aquaplast), prefabricated neoprene
• Evidence for CTS: wrist splinting in 20° extension reduces carpal tunnel pressure (Gelberman); nocturnal splinting reduces night symptoms (Cochrane review 2012)

• Dynamic splint utilizing tenodesis effect; wrist flexion = finger extension; wrist extension = finger flexion
• Indications: C6 tetraplegia (no active hand/finger movement); allows functional grasp using wrist extensor strength

• Positions thumb in palmar abduction and opposition; includes wrist
• Indications: median nerve palsy (low or high), de Quervain's tenosynovitis

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B. THUMB SPLINTS

• Immobilizes CMC and MCP of thumb; wrist free
• Indications: Bennett's fracture (post-reduction), scaphoid fracture, thumb UCL injury (Gamekeeper's/Skier's thumb), CMC joint OA (basal thumb arthritis), de Quervain's
• Design: volar-based thermoplastic extending from thenar eminence to thumb tip

• Immobilizes only the interphalangeal joint of thumb
• Indications: mallet thumb, IP joint sprain, flexor/extensor tendon injuries at IP level

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C. FINGER SPLINTS

• Holds DIP joint in 0-5° hyperextension (full extension)
• Indications: Mallet finger deformity (Zone I extensor tendon rupture/avulsion)
• Protocol: worn continuously for 6-8 weeks; then night use for 4-6 weeks
• Critical: DIP must never be allowed to flex during the initial treatment period - risks re-rupture

• Holds PIP joint in extension using dynamic force (spring coil)
• Indications: PIP flexion contracture, Boutonnière deformity rehabilitation, post-surgical PIP joint
• Mechanism: applies low-load prolonged stretch (LLPS) to contracted palmar capsule/volar plate; promotes tissue remodeling (creep and stress relaxation)

• Static; positions PIP in full extension or slight hyperextension
• Indications: Swan neck deformity correction, pseudo-boutonnière, PIP sprain, middle phalanx fracture

• Not a formal splint; adjacent finger provides dynamic support
• Indications: PIP/DIP sprain (grades I-II), phalangeal fractures (stable, non-displaced)

• Silver or aluminum ring at PIP joint; controls hyperextension while allowing full flexion
• Indications: Rheumatoid arthritis swan neck deformity, hypermobility syndrome
• Prevents hyperextension at PIP joint while preserving functional flexion

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D. WRIST-HAND ORTHOSES (RESTING HAND SPLINTS)

• Positions hand in: wrist 20-30° extension, MCPs 40-60° flexion, IPs 0-10° flexion, thumb in palmar abduction (cone position)
• Covers entire palmar surface from forearm to fingertips
• Indications: rheumatoid arthritis (reduces pain and deformity overnight), spasticity (stroke, CP, TBI - anti-spasticity), burns prevention of contractures, Dupuytren's post-fasciectomy, acute flexor tendon repair
• Materials: thermoplastic low-temperature (Orfit Classic, Aquaplast T)

• Applied dorsally to avoid stimulating palmar spasticity receptors
• Indications: upper limb spasticity (stroke, brain injury, CP)
• Positions: wrist extension, fingers extended, thumb abducted

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E. DYNAMIC SPLINTS

• Post-Zone II flexor tendon repair; dorsal blocking splint with rubber band traction
• Kleinert: wrist 20-30° flexion + MCP 60-70° flexion + rubber band assists finger flexion; patient actively extends fingers to the dorsal hood block
• Duran modified: passive flexion exercise protocol within splint
• Indications: Zone II flexor tendon repair (no man's land) - allows tendon gliding while protecting repair from rupture (4-kg load threshold for zone II repairs)
• Used for 3-4 weeks post-repair

• Wrist extended; MCP extension via outrigger + rubber band slings; IPs free
• Indications: extensor tendon repair (Zones IV-VII); allows active MCP flexion, passive MCP extension

• Dynamic: outrigger directs force perpendicular to proximal phalanx; rubber band or spring provides traction
• Indications: MCP flexion contractures, post-arthroplasty, scarring from burns
• Low-profile: less bulky, better compliance; mechanics requires adjustment as ROM changes

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PRINCIPLES OF HAND SPLINTING

1. Position of safe immobilization (POSI / Edinburgh Position):
   • Wrist: 20-30° extension
   • MCPs: 70-90° flexion (collateral ligaments in maximum tension - prevent shortening)
   • PIPs/DIPs: full extension
   • Thumb: palmar abduction
   • Use for: acute injuries, burns, post-surgery, edema to prevent contracture
2. Functional position: wrist 20-30° ext; MCPs 40-60° flex; IPs 0-10° flex; used for resting splints in RA and neurological conditions
3. Low-load prolonged stretch (LLPS): dynamic splints exert forces below the threshold for pain or circulation compromise (<300g); sustained over long periods (30 min to hours); achieves permanent tissue elongation via creep
4. Pressure distribution: wide, conforming contact distributes pressure; avoid bony prominences; minimum 2/3 circumference for rigid splints
5. Skin and vascular checks: monitor for blanching, pressure marks, numbness

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• Gilanliogullari N & Soyer K (2024, Prosthet Orthot Int, PMID 38775748): Systematic review - dynamic wrist-hand splints in RA improve grip strength, reduce pain, improve functional performance
• Static wrist splints in CTS: superior to no treatment; equivalent to corticosteroid injection at 6 months (Cochrane 2012)

• Fess EE, Gettle KS, Philips CA - Hand and Upper Extremity Splinting: Principles and Methods, 3rd Ed
• Trombly CA - Occupational Therapy for Physical Dysfunction, 7th Ed
• Bradley and Daroff's Neurology in Clinical Practice (Orthotists and Bracing)
• Cooper C - Fundamentals of Hand Therapy

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ANSWER 6: Ankle Foot Orthosis (AFO) (10 Marks - Summer 2021)

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DEFINITION

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BIOMECHANICS OF THE NORMAL ANKLE DURING GAIT

• Initial contact: heel strike; ankle at neutral (0°)
• Loading response: controlled plantarflexion to ~15° (eccentric tibialis anterior)
• Midstance: ankle dorsiflexes to ~10° (tibia advances over foot)
• Terminal stance: heel rise; plantarflexion begins
• Pre-swing: push-off; max plantarflexion ~20°
• Swing phase: dorsiflexion (toe clearance); tibialis anterior concentric activity

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CLASSIFICATION OF AFOs

A. STATIC / RIGID AFOs

• Thin, flexible thermoplastic shell; no ankle joint; trimlines posterior to malleoli
• Allows slight plantarflexion during loading; mild spring-back dorsiflexion in swing
• Indications: mild-moderate foot drop (L4/L5 radiculopathy, mild hemiplegia, Charcot-Marie-Tooth disease, peroneal nerve palsy)
• Materials: polypropylene, 3-5 mm thickness; custom-molded to foot/ankle
• "A custom-made plastic ankle-foot orthosis is necessary to improve gait in the presence of severe foot drop" (Bradley & Daroff's Neurology)

• Rigid; trimlines anterior to malleoli; no ankle movement
• Maximum restriction of plantarflexion and dorsiflexion
• Indications: severe spasticity, severe foot drop with mediolateral instability, severe hemiplegia, flail ankle, severe neuropathic ankle instability
• Can be set at desired ankle angle: 0° (neutral), 5° DF (reduces knee hyperextension), 5° PF (aids knee extension in weak quadriceps)

• Rigid AFO with anterior tibial shell; positioned 5° plantarflexion
• Creates ground reaction force that extends the knee in midstance (floor reaction force)
• Indications: crouch gait (excessive knee flexion) in cerebral palsy, weakness of knee extensors, crouch gait from weak plantarflexors

• Hinged at ankle; allows free dorsiflexion; stops at neutral (blocks plantarflexion)
• Indications: hemiplegia with spastic equinus; genu recurvatum
• Advantage over solid AFO: allows tibial advancement in midstance (more physiological gait)

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B. DYNAMIC / ARTICULATED AFOs

• Metal or plastic ankle joint; free movement in sagittal plane
• Can add plantarflexion stop, dorsiflexion stop, or both
• Indications: hemiparesis with variable spasticity; polyneuropathy; post-polio

• Carbon fiber spring AFO (e.g., IDEO - Intrepid Dynamic Exoskeletal Orthosis)
• Energy return device: stores energy at heel strike, releases at push-off
• Indications: active military personnel with ankle/foot injuries; traumatic nerve injury with foot drop + weak push-off

• Uses flexible polypropylene joint at the ankle; allows plantar/dorsiflexion with resistance
• Better cosmesis and gait biomechanics than solid AFO

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C. PATTERNED (TONE-REDUCING) AFOs

• Molded with toe extensions and medial longitudinal arch support
• Designed to inhibit spasticity through specific foot positioning
• Indications: CP, stroke with significant spasticity and equinovarus deformity

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D. SPECIALTY AFOs

• Transfers weight-bearing from foot to patellar tendon via proximal cuff
• Reduces loading on foot/ankle (calcaneal fractures, Charcot neuroarthropathy)

• Circumferential boot with rocker bottom sole
• Indications: stress fractures, acute ankle sprains, Achilles tendon rupture (conservative management with progressive dorsiflexion), plantar fasciitis

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INDICATIONS FOR AFO PRESCRIPTION

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PHYSIOTHERAPY ROLE IN AFO MANAGEMENT

• Gait analysis: identify deviations AFO aims to correct (foot slap, toe drag, circumduction, hip hiking)
• Muscle strength: tibialis anterior, gastroc-soleus, peroneals
• Spasticity assessment: MAS, clonus, PROM
• Foot alignment: fixed vs. flexible equinovarus deformity

• "Indications for AFO include inadequate dorsiflexion for initial heel contact or toe clearance, excessive hip hiking during swing, mediolateral subtalar instability, tibial instability during stance, and uncontrolled foot placement from sensory loss"
• AFO set in slight PF → promotes knee extension (weak quad); AFO set in DF 5° → reduces knee hyperextension

• Pre-gait exercises: hip hike prevention, weight shift, balance
• Ambulation training: level surfaces → inclines → stairs → community surfaces
• Energy expenditure monitoring: pathological gait is more energy-intensive than AFO-assisted gait

• Choo YJ & Chang MC (2021, Sci Rep, PMID 34354172): Meta-analysis - AFO in stroke patients significantly improves walking speed (SMD 0.50), stride length, and cadence
• Wada Y et al. (2022, PM&R, PMID 34369101): Meta-analysis - AFO improves ankle kinematics (reduces equinus, improves dorsiflexion angle) in stroke patients

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• Bradley and Daroff's Neurology in Clinical Practice (Orthotists and Bracing, AFO section)
• Campbell's Operative Orthopaedics, 15th Ed 2026 (AFO table)
• Lusardi MM, Orthotics and Prosthetics in Rehabilitation, 3rd Ed
• Perry J & Burnfield JM - Gait Analysis

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ANSWER 7: Principle of Three-Point Pressure and Its Application in Orthosis (10 Marks - Winter 2020)

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INTRODUCTION

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BASIC PHYSICS OF THREE-POINT PRESSURE

• Bending moment (M) = Force × Perpendicular distance from force to fulcrum
• For correction: M_corrective must equal or exceed M_deforming
• To achieve sufficient corrective moment with less force: increase the distance between reaction force contact points (lever arm) - this allows correction with lower, tissue-safe pressures

• F1: Corrective force - applied at the apex of deformity (greatest single force)
• F2 and F3: Reaction forces - applied on the opposite side above and below F1; each = F1/2 (when symmetrically placed)
• Total equilibrium: F1 = F2 + F3

• Capillary closing pressure (Husain, 1953): ~32 mmHg (~4.3 kPa)
• Forces exceeding this over small areas cause pressure necrosis/ischemia
• Orthosis design: distribute forces over large surface areas to keep interface pressure below 32 mmHg
• Formula: Pressure = Force / Contact Area → Larger area = less pressure per unit

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APPLICATIONS IN ORTHOSES

1. Cervical Orthoses

• F1 (corrective): Posterior cervical pad (restricts extension / supports flexion deformity)
• F2: Anterior mandibular support (above)
• F3: Anterior sternal/clavicular pad (below)

• F1 = anterior chin/occipital pad; F2+F3 = posterior neck pad (mid) + posterior thoracic pad

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2. Thoracolumbar Hyperextension Orthosis (Jewett Brace)

• F1 (corrective): Posterior lumbar pad at fracture level - pushes spine anteriorly (into extension)
• F2: Anterior sternal pad (upper)
• F3: Anterior pubic symphysis pad (lower)

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3. Scoliosis Bracing (Boston TLSO / Chêneau Brace)

• F1 (corrective): Lateral pad at the apex of the convex curve (e.g., right thoracic pad for right thoracic scoliosis)
• F2: Lateral counter-pad on the concave side above the apex (left shoulder region)
• F3: Lateral counter-pad on the concave side below the apex (left pelvis/iliac crest)

• Adds rotational correction via derotation pads
• Expansion zones opposite pressure pads allow active 3D correction (pneumatic-effect)
• This is the basis of principle of 3D brace correction: transverse force (3-point) + sagittal correction + derotation

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4. Milwaukee Brace (CTLSO) for Thoracic Scoliosis

• F1: Lateral thoracic pad at apex (thoracic)
• F2: Lumbar pad (opposite side, below)
• F3: Cervical ring (neck hold, above) - unique feature of Milwaukee brace
• Axillary slings provide additional corrective forces
• Correction also relies on the patient actively "growing away" from the pads (active correction principle)

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5. Lumbosacral Orthosis for Spinal Fractures

• F1: Anterior abdominal pad (pushes lumbar spine into extension, corrects kyphosis)
• F2: Posterior upper thoracic pad
• F3: Posterior sacral pad

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6. Knee Orthosis (Valgus Unloader Brace for Medial OA)

• F1: Lateral femoral condyle pad (pushes knee medially from lateral side)
• F2: Medial proximal tibial pad (pushes up-and-in from below the joint)
• F3: Lateral distal femoral counter-pad (proximal reaction force)
• Net effect: valgus moment at knee → shifts load from medial compartment (OA) to lateral compartment

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7. Wrist Drop Orthosis (Radial Nerve Palsy)

• F1: Dorsal wrist extension pad (holds wrist in extension)
• F2: Palmar distal forearm pad
• F3: Palmar mid-palm pad
• Maintains wrist in functional extension in radial nerve palsy (wrist drop deformity)

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8. Mallet Finger Splint (DIP Extension)

• F1: Dorsal DIP joint pad (pushes DIP into extension)
• F2: Palmar fingertip pad
• F3: Dorsal proximal phalanx pad
• Net effect: DIP maintained in full extension → allows Zone I extensor tendon healing

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DESIGN CONSIDERATIONS FOR EFFICIENT THREE-POINT PRESSURE

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LIMITATIONS OF THE THREE-POINT PRESSURE PRINCIPLE

1. Soft tissue compliance: forces transmitted to bone reduced by compressible soft tissue (subcutaneous fat, muscle)
2. Forces cannot be applied directly to bone (unlike internal fixation)
3. All orthoses reduce motion, not eliminate it (end-level motion, soft tissue creep)
4. Skin pressure tolerance limits maximum corrective force
5. Obese patients: force transmission significantly reduced

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• Rockwood & Green's Fractures in Adults, 10th Ed 2025 (Three-point pressure, Cervical and Spinal Orthoses)
• Lusardi MM, Orthotics and Prosthetics in Rehabilitation, 3rd Ed
• Seymour R - Prosthetics and Orthotics: Lower Limb and Spinal
• Miller's Review of Orthopaedics, 9th Ed

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ANSWER 8: Splints Used for Hand Disorders (10 Marks - Summer 2019)

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CLASSIFICATION BY CLINICAL DISORDER

I. RHEUMATOID ARTHRITIS (RA)

1. Resting Pan Splint (night splint): positions hand in functional position; reduces pain and morning stiffness; prevents contracture progression; worn nocturnally
2. Working wrist splint: stabilizes wrist in 10-15° extension during daily activities; reduces pain, increases grip function
3. Ulnar Deviation Splint: positions MCPs in neutral, prevents further ulnar drift; custom-made for each finger or whole hand
4. Swan Neck Ring Splint (Silver Ring Splint): at PIP level; prevents PIP hyperextension while allowing full flexion; used during activities
5. Boutonnière Splint: static: PIP in extension; serial splinting to reduce PIP flexion contracture; dynamic extension splint (Capener)
6. Thumb CMC Stabilizer: for CMC-I OA in RA; short opponens splint

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II. MEDIAN NERVE PALSY

1. Opponens Splint (Short Opponens / Thumb Spica): maintains thumb in palmar abduction and opposition; allows pinch; worn full-time or during activities
2. Long Opponens Splint: includes wrist support; for high median nerve palsy (elbow + hand)
3. Lumbrical Bar: for claw hand of index and middle fingers (prevents hyperextension of MCPs, enables IPs to extend)

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III. ULNAR NERVE PALSY

1. Lumbrical Bar / Anti-Claw Splint: volar metacarpal bar blocking MCP hyperextension; allows IP extension
2. Knuckle Bender: dynamic MCP flexion splint
3. Opponens bar: if combined median-ulnar palsy

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IV. RADIAL NERVE PALSY (WRIST DROP)

1. Wrist Cock-Up Splint: positions wrist in 20-30° extension; frees intrinsics and flexors for functional pinch/grasp
2. Dynamic Tenodesis Splint: uses tenodesis effect; wrist extension activates passive finger flexion; wrist flexion allows finger release
3. Dynamic MCP Extension Splint with outrigger: rubber bands provide passive MCP extension; patient uses flexors actively; allows functional grasp

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V. CARPAL TUNNEL SYNDROME (CTS)

1. Neutral Wrist Splint (0° or 10-15° extension): worn nocturnally; reduces carpal tunnel pressure; first-line conservative treatment
   • Note: historically wrist extension splints (15-20°) used; evidence now favors neutral (0°) position for minimum CTS pressure (Werner et al.)
2. Activity splint: worn during provocative activities (computer use, driving)

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VI. DE QUERVAIN'S TENOSYNOVITIS

1. Thumb Spica Splint: immobilizes first compartment (APL + EPB tendons); extends from thumb IP to forearm; reduces friction at the first extensor compartment
2. Short Opponens Splint: thumb in abduction + extension; thumb CMC/MCP immobilized; wrist free

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VII. TRIGGER FINGER (STENOSING TENOSYNOVITIS)

1. MCP Blocking Splint: holds MCP in 10-15° flexion; prevents triggering (which occurs at full MCP extension); worn full-time for 6 weeks
2. DIP Splint: for triggering localized to DIP flexion

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VIII. DUPUYTREN'S DISEASE (Post-Fasciectomy)

1. Extension Gutter Splint: holds MCP and PIP in full extension; post-operative; worn nocturnally for 3-6 months
2. Dynamic Extension Splint: low-load prolonged stretch for residual contracture
3. Serial Static Splinting: weekly or bi-weekly re-molding to progressively gain extension

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IX. BURNS (HAND AND WRIST)

1. Position of Safe Immobilization (POSI) Splint: wrist 20-30° extension; MCP 70-90° flexion; PIPs/DIPs full extension; thumb abducted; prevents contracture of collateral ligaments and palmar fascia

1. Dynamic Outrigger Splints: restore ROM to scarred/contracted joints
2. Pressure garments + conformer splints: reduce hypertrophic scarring

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X. FLEXOR/EXTENSOR TENDON REPAIRS

1. Kleinert Dorsal Blocking Splint: wrist 20-30° flex + MCP 60-70° flex + rubber band traction for finger flexion; patient actively extends to dorsal hood; allows controlled early motion (3-4 weeks)

• Zone I (mallet finger): Stack/mallet splint - DIP in 0-5° hyperextension × 6-8 weeks
• Zone IV-VII: Dynamic MCP extension splint; wrist 40° extension + MCP extension via outrigger

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• Fess EE et al., Hand and Upper Extremity Splinting, 3rd Ed (Elsevier)
• Cooper C, Fundamentals of Hand Therapy, 2nd Ed
• Trombly CA, Occupational Therapy for Physical Dysfunction
• Weiss S, Falkenstein N - Hand Rehabilitation, 2nd Ed

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ANSWER 9: Spinal Orthosis (10 Marks - Summer 2017)

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DEFINITION

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GENERAL PRINCIPLES (Brief)

1. Three-point pressure mechanism for deformity correction and motion restriction
2. IAP mechanism for lumbar unloading
3. Passive restriction + proprioceptive facilitation
4. Must be combined with exercise to prevent muscle atrophy

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CLASSIFICATION BY REGION

I. Cervical Orthoses (CO)

II. Cervicothoracic Orthoses (CTO)

• SOMI brace: occipital, mandibular, sternal supports; controls C3-C7 better than collar alone; used post-ACDF
• Minerva brace: 79-87% restriction of sagittal motion; viable alternative to halo in compliant patients; no skin pin complications
• Yale brace: CTO with thoracic shell extension

III. Thoracolumbosacral Orthoses (TLSO)

IV. Lumbosacral Orthoses (LSO)

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PHYSIOTHERAPY ROLE IN SPINAL ORTHOSIS MANAGEMENT

1. Assessment: confirm orthosis indication; identify red flags; body measurements
2. Prescription: collaborate with orthotist; specify motion to restrict, correction needed
3. Patient education: wearing schedule, skin care, hygiene
4. Fitting and adjustment: verify proper fit; test for skin pressure marks
5. Exercise prescription: trunk stabilization, postural re-education, breathing exercises (if thoracic brace)
6. Monitoring: serial radiographs (scoliosis: Cobb angle every 4-6 months); functional outcomes (ODI, NPRS for LBP)
7. Weaning: gradual reduction in wearing hours as condition resolves; abrupt discontinuation contraindicated

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COMPLICATIONS OF SPINAL ORTHOSES

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• Rockwood & Green's Fractures in Adults, 10th Ed 2025 (Cervical and Thoracolumbar Orthoses)
• Miller's Review of Orthopaedics, 9th Ed (Bracing for Scoliosis)
• Bradley and Daroff's Neurology in Clinical Practice (Orthotists and Bracing, AFO + KAFO)
• Lusardi MM, Orthotics and Prosthetics in Rehabilitation, 3rd Ed
• Campbell's Operative Orthopaedics, 15th Ed 2026

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MASTER QUICK-REFERENCE TABLE