Physical Therapy Management: T4–T5 Spinal Cord Injury

Neurological Profile at T4–T5

• T4 dermatome = nipple line
• T5 = just below, with full upper extremity and hand function preserved
• Injury above T6 places the patient at risk for autonomic dysreflexia (the T4–T5 level sits above the T6 splanchnic sympathetic outflow)
• Loss of trunk musculature below the lesion, bilateral lower extremity paralysis/sensory loss

• Self-care: Independent
• Transfers: Independent
• Maximum mobility: Ambulates short distances with aids

ASIA Classification & Goal Setting

• AIS A (complete): No motor/sensory below the lesion → wheelchair as primary mobility, focus on UE strength and independence in ADLs
• AIS B/C/D (incomplete): Potential for locomotor recovery; walking training becomes a central goal

Rehabilitation Goals (Functionally Based)

Core PT Interventions

1. Early Mobilization

• Begin PT while still medically stable, even in ICU/acute phase
• 2020 clinical practice guidelines (Journal of Neurology & Physical Therapy) recommend postacute care in institutional and community settings with moderate-to-high intensity walking training where feasible
• AOSpine/AANS 2017 guidelines emphasize early rehabilitation once medically stable with psychosocial rehabilitation — Current Surgical Therapy 14e, p. 3060

2. Strengthening & Conditioning

• Upper extremity strengthening: Shoulders, triceps, and latissimus dorsi are critical for wheelchair propulsion and transfers (all innervated above T4–T5)
• Trunk stabilization: Partial active trunk control may be preserved depending on lesion completeness; core work is essential for upright sitting balance
• Resistance training (free weights, pulley systems, FES-assisted exercise)

3. Locomotor Training (for incomplete lesions)

• Body-weight-supported treadmill training (BWSTT): Patient partially suspended by harness on a treadmill; stepping movements assisted by therapists
• Shown to improve locomotor function in chronic SCI patients after 3–20 weeks of daily training
• Virtual reality walking and circuit training are recommended adjuncts
• Robotic-assisted gait training (e.g., Lokomat) and exoskeletons are emerging options — Principles of Neural Science, 6th ed. (Kandel), p. 858

4. Wheelchair Skills Training

• Manual wheelchair propulsion technique
• Pressure relief (weight shifts every 15–30 min to prevent decubitus ulcers)
• Negotiating ramps, curbs, uneven terrain

5. Transfer Training

• Lateral sliding board transfers
• Floor-to-wheelchair transfers
• Progressive independence from max assist → independent

6. Respiratory Physiotherapy

• At T4–T5, intercostal and abdominal muscles are lost → reduced expiratory force and cough effectiveness
• Assisted cough techniques (manually assisted or mechanical insufflation-exsufflation)
• Incentive spirometry, breath stacking
• Upper thoracic SCI has elevated risk of pneumonia (28% within 6 weeks of injury)

7. Positioning & Pressure Injury Prevention

• Regular repositioning schedule
• Skin inspection education
• Decubitus ulcer occurs in ~18% of patients within 6 weeks of acute SCI — Bradley and Daroff's Neurology in Clinical Practice

Management of Key Complications

Autonomic Dysreflexia (critical at T4–T5)

• Occurs with lesions above T5–T6 due to unchecked sympathetic outflow
• Triggered by: bladder distension, bowel impaction, pressure sores, nociceptive stimuli below the lesion
• Presentation: severe hypertension, bradycardia, headache, flushing, diaphoresis above the lesion
• PT role: recognize triggers, educate patient, cease activity and sit upright immediately, identify and remove the precipitant — Goldman-Cecil Medicine, p. 1473

Spasticity

• Stretching exercises to maintain ROM and prevent contractures are the cornerstone of PT management
• Prolonged low-load stretching, splinting/orthoses, positioning
• Pharmacological adjuncts (baclofen up to 240 mg/d, tizanidine, diazepam) coordinate with PT goals — be cautious as spasticity sometimes aids standing/transfers
• Severe/refractory: intrathecal baclofen pump, botulinum toxin injections — Harrison's Principles of Internal Medicine 22E, p. 3613

Orthostatic Hypotension

• Common early in rehabilitation; managed with:
  • Abdominal binders and compression stockings
  • Gradual tilt-table progression
  • Recline wheelchair with elevating leg rests during early mobilization

DVT/PE Prevention

• Calf compression devices + low-molecular-weight heparin in the acute phase
• Anticoagulation continued ~3 months in persistent paralysis
• PT mobilization itself is a DVT-reduction strategy

Neurogenic Bladder & Bowel

• PT educates on bowel/bladder routine to prevent triggers for autonomic dysreflexia
• Intermittent self-catheterization training
• Timed bowel program (key to infection and AD prevention)

Pain Management

• Neuropathic pain: Gabapentin or pregabalin (RCT evidence)
• Musculoskeletal pain: from overuse of shoulders (wheelchair athletes); addressed with PT strengthening and technique correction
• Central pain: may be addressed with epidural stimulation in refractory cases

Outcome Measures Used in SCI Rehab

Prognosis

• Level of injury (T4–T5 = below resp. centers, above splanchnic outflow)
• AIS grade at injury (complete vs incomplete)
• Age and MRI appearance (edema/hemorrhage on T2 = poor prognosis)
• Recovery potential fades after ~6 months for complete lesions