Parkinson's Disease - Clinical Analysis

Question 1: Type of Parkinson's Disease

• Primary (Idiopathic) PD - the most common form (~80% of all parkinsonism), with no identifiable cause; this is what this patient has
• Secondary (Symptomatic) Parkinsonism - due to drugs (e.g., metoclopramide, neuroleptics), toxins, vascular disease, trauma, or encephalitis
• Parkinson-plus syndromes - Progressive Supranuclear Palsy, Multiple System Atrophy, Corticobasal Degeneration - distinguished by atypical features (early falls, eye movement abnormalities, autonomic failure)
• Hereditary Parkinsonism - rare, typically onset before age 30
• Adams and Victor's Principles of Neurology, 12th Ed., p. 1085
• Bradley and Daroff's Neurology in Clinical Practice

Question 2: Cardinal Features Seen in This Patient

Features Present in This Patient:

• The 4-5 Hz "pill-rolling" tremor of the thumb and fingers is the most characteristic tremor of PD
• It is present when the hand is at rest and dampens momentarily with voluntary movement ("tremor in repose")
• Involves alternating activation of agonist and antagonist muscles (cogwheel phenomenon when superimposed on rigidity)
• Present in ~70% of patients as the initial symptom

• Slowness of initiated or commended movement
• Manifests as reduced arm swing while walking (as seen in this patient), hypomimia (masked facies), soft monotonous speech, and micrographia
• Along with hypokinesia (reduced amplitude of movement), this is often the most disabling feature

• Increased resistance to passive movement throughout the range of motion
• "Lead-pipe rigidity" - uniform resistance; when combined with tremor it produces "cogwheel rigidity"
• Contributes to the stooped posture and reduced arm swing

• Loss of righting reflexes; typically emerges later
• In this patient at Stage 1, postural instability is not yet a feature - this is consistent with early-stage disease

Additional features consistent with PD in this patient:

• Reduced arm swing - a manifestation of both bradykinesia and rigidity in the upper limb
• Unilateral onset - strongly favors idiopathic PD over atypical parkinsonism

Question 3: Hoehn and Yahr Staging

Full Scale (Original + Modified):

Stage Relevant to This Patient: Stage 1 (Modified Scale)

• Unilateral involvement only
• Symptoms started gradually on one side (resting tremor, bradykinesia, rigidity, reduced arm swing - all unilateral)
• No axial involvement mentioned, no bilateral features, no postural instability
• Minimal or no functional impairment at this stage

• Bradykinesia and rigidity are detectable on the symptomatic side
• Midline signs such as reduced facial expression or mild contralateral changes may already be subtly present
• Rest tremor in one hand is often the presenting feature
• This is the stage where diagnosis is often first made
• Bradley and Daroff's Neurology in Clinical Practice, Table 96.4
• Adams and Victor's Principles of Neurology, 12th Ed.

Question 4: Physiotherapy Management Plan

A. Assessment (Initial Evaluation)

• Baseline motor function assessment (UPDRS motor subscale - Part III)
• Gait analysis: stride length, cadence, speed, freezing episodes
• Balance assessment (Berg Balance Scale, Timed Up and Go test)
• Postural assessment (forward trunk lean, kyphosis)
• Functional mobility and ADL capability
• Respiratory function assessment

B. Goals of Physiotherapy

• Reduce rigidity and improve range of motion
• Improve gait parameters (stride length, arm swing)
• Prevent falls and improve balance

• Slow functional decline
• Maintain independence in ADLs
• Prevent contractures and respiratory complications
• Improve quality of life

C. Physiotherapy Interventions

1. Range of Motion and Flexibility Exercises

• Active and passive stretching of all major joints
• Trunk rotation exercises to counteract axial rigidity
• Shoulder mobilization (important given reduced arm swing)
• Spinal extension exercises to address forward-flexed posture

2. Muscle Strengthening

• Proximal muscle strengthening (shoulder girdle, hip extensors)
• Core stability exercises
• Resistance training 2-3 times/week
• Progressive increase in repetitions over time

3. Gait Training

• Auditory cueing (metronome, rhythmic music): has been shown to lessen hypokinesia and improve stride length
• Visual cueing (floor markings, laser lines): helps overcome freezing episodes
• Treadmill training: improves gait speed, cadence, and step length
• Focus on heel-strike pattern and arm swing
• Training in turning, initiating gait, and navigating obstacles

4. Balance Training

• Static and dynamic balance exercises
• Tai Chi (evidence-based for balance and fall prevention in PD)
• Dual-task training (walking while performing a cognitive task)
• Perturbation-based training to improve reactive postural control

5. Functional Mobility Training

• Practice of bed mobility: rolling, sitting up
• Sit-to-stand transfers with progressive difficulty
• Whole-body movement practice (sitting, kneeling, standing up, throwing)
• One study showed that twice-weekly practice of whole-body movements for 3 months improved mobility speed in moderately disabled PD patients

6. Aerobic/Endurance Training

• Walking programs: start 20-30 min/day, 3-5 days/week
• Stationary cycling (high-cadence cycling has evidence in PD)
• Swimming or hydrotherapy
• Progressive increase in duration and intensity

7. Respiratory Exercises

• Diaphragmatic breathing exercises
• Thoracic expansion exercises
• LSVT BIG (Lee Silverman Voice Treatment adapted to movement) - high-amplitude, high-effort movements

8. Fine Motor Training

• Hand dexterity exercises (buttoning, writing, manipulating objects)
• Studies show outpatients can be trained to increase speed of skilled movements such as buttoning, with more practice than normal controls require

9. Education and Home Program

• Patient and caregiver education on fall prevention
• Home exercise program with emphasis on regularity
• Energy conservation strategies

D. Schedule and Frequency

E. Multidisciplinary Coordination

• Neurology: timing exercises when dopaminergic medication is at its peak ("on" state)
• Occupational therapy: ADL training, adaptive equipment
• Speech therapy: prosody, breath support, intelligibility (LSVT LOUD)
• Dietitian: dysphagia management (relevant in later stages)