7.3 Neuromuscular Diseases & Myopathies
Key Takeaways
- Guillain-Barré Syndrome (GBS) progresses through acute inflammatory, plateau, and recovery phases; interventions in acute/plateau stages focus on contracture prevention and non-fatiguing communication/positioning, while recovery requires gradual resistive exercise with strict avoidance of eccentric fatigue and overwork weakness.
- Myasthenia Gravis (MG) causes fluctuating muscle weakness targeting ocular and bulbar musculature; occupational therapy interventions prioritize activity pacing and scheduling demanding tasks during peak anticholinesterase medication effectiveness.
- Duchenne Muscular Dystrophy (DMD) is characterized by Gowers' sign, calf pseudohypertrophy, and loss of independent ambulation by ages 9–12, requiring proactive power mobility, tilt-in-space pressure relief, scoliosis prevention, and energy conservation.
- Post-Polio Syndrome (PPS) presents with new progressive weakness, profound fatigue, and cold intolerance decades after acute polio; therapy requires non-fatiguing pacing ('energy conservation') and submaximal exercise that avoids the 'no pain, no gain' mentality.
- Across all progressive neuromuscular conditions, occupational therapy emphasizes the '4 Ps' of energy conservation: Prioritize, Plan, Pace, and Position, to preserve independent participation while protecting vulnerable motor units from overwork damage.
Last updated: August 2026
Neuromuscular Diseases & Myopathies
Neuromuscular disorders affect lower motor neurons, peripheral nerves, the neuromuscular junction, or skeletal muscle. Occupational therapists tailor activity and exercise to the diagnosis, phase of recovery, fluctuating fatigability, and the client's response so participation improves without provoking excessive fatigue, pain, or delayed recovery.
1. Guillain-Barré Syndrome (GBS)
Guillain-Barré Syndrome (Acute Inflammatory Demyelinating Polyneuropathy / AIDP) is an acute, post-infectious autoimmune neuropathy targeting the myelin sheaths of peripheral nerves and spinal roots.
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| GUILLAIN-BARRÉ SYNDROME (GBS) PROFILE |
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| ETIOLOGY & PATHOPHYSIOLOGY | CLINICAL PRESENTATION |
+-------------------------------------------------+-------------------------------------------------+
| • Post-infectious autoimmune response (often | • Rapid, symmetrical, **ascending flaccid |
| following Campylobacter jejuni enteritis or | paralysis** (begins in feet/legs, ascends |
| viral respiratory illness). | to trunk, upper extremities, and face). |
| • Autoantibodies attack Schwann cells and | • Areflexia (absent deep tendon reflexes). |
| peripheral myelin, slowing conduction. | • Distal symmetrical sensory paresthesias ('glove|
| • Medical management: IVIG or plasmapheresis | and stocking' distribution). |
| (plasma exchange); corticosteroids ineffective| • Autonomic instability (labile BP, arrhythmias)|
| | • Bulbar palsy & respiratory failure (~30% need |
| | mechanical ventilation in ICU). |
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The Three Clinical Phases of GBS & Stage-Matched OT
| Clinical Phase | Duration & Clinical Milestones | Occupational Therapy Interventions & Critical Precautions |
|---|---|---|
| 1. Acute / Inflammatory Phase | • Duration: 2 to 4 weeks.<br>• Milestones: Rapid progressive weakness from onset until peak neurological deficit is reached; high medical fragility. | • ICU Positioning: Multipodus boots to prevent heel breakdown and foot drop; resting hand splints in functional position.<br>• Gentle PROM: Perform within pain-free limits to maintain joint range without straining denervated muscles.<br>• Environmental Control: Non-fatiguing call buttons, specialized switch interfaces, and picture/communication boards.<br>• Contraindication: No active-resistive strengthening! |
| 2. Plateau Phase | • Duration: 2 to 4 weeks.<br>• Milestones: Neurological deterioration stabilizes; client remains at peak deficit without improvement or worsening. | • Passive & Active-Assisted ROM: Maintain joint flexibility; prevent soft tissue contractures.<br>• Upright Tolerance: Gradual upright progression using tilt-in-space wheelchair or tilt table to combat orthostatic hypotension.<br>• Environmental Modifications: Electronic Aids to Daily Living (EADLs), mouthsticks, hands-free phone access.<br>• Precaution: Avoid muscle fatigue; preserve joint integrity. |
| 3. Recovery / Rehabilitation Phase | • Duration: Up to 2 years (remyelination occurs proximal to distal).<br>• Milestones: Gradual, progressive motor return and sensory resolution. | • Graded Strengthening: Dynamic, low-resistance, high-repetition functional activities progressing from active-assisted to gentle active-resistive exercise.<br>• Energy Conservation & Pacing: Teach activity pacing to prevent overwork weakness.<br>• ADL/IADL Retraining: Adaptive equipment (reachers, button hooks, lightweight utensils) used temporarily during functional relearning.<br>• PRECAUTION: Avoid high-load or fatiguing exercise early in recovery; introduce resistance gradually and monitor for pain, prolonged fatigue, or loss of function that persists after the session. |
2. Myasthenia Gravis (MG)
Myasthenia Gravis is an autoimmune disorder of the neuromuscular junction characterized by fluctuating, fatigable weakness in voluntary skeletal muscles.
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| MYASTHENIA GRAVIS (MG) PROFILE |
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| PATHOPHYSIOLOGY & MECHANISM | CLINICAL HALLMARKS & SIGNS |
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| • Circulating antibodies block, alter, or | • **Fluctuating, exercise-induced weakness:** |
| destroy post-synaptic **nicotinic acetylcholine| Strength is best in the morning after rest and|
| receptors (AChR)** at the motor end-plate. | progressively declines with repetitive use. |
| • Decreased number of functional receptors | • **Ocular Symptoms (Initial sign in >50%):** |
| impairs neuromuscular transmission. | Ptosis (drooping eyelids), diplopia (double |
| • Pharmacological Management: Anticholinesterase| vision). |
| medications (pyridostigmine / Mestinon), | • **Bulbar Weakness:** Dysarthria, dysphagia, |
| immunosuppressants, thymectomy. | chewing fatigue, nasal regurgitation. |
| | • **Proximal Limb Weakness:** Shoulder/pelvic. |
| | • **Myasthenic Crisis:** Respiratory paralysis. |
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Occupational Therapy Interventions & Practice Guidelines for MG
- Activity Pacing & Medication Timing: Schedule demanding self-care, meal preparation, and therapy sessions during peak medication effectiveness (typically 30 to 60 minutes after taking anticholinesterase medications such as pyridostigmine).
- Mealtime & Swallowing Adaptations:
- Eat small, frequent, soft-texture meals rather than three heavy meals.
- Sit fully upright at 90 degrees during and for 30 minutes after eating.
- Rest jaw and throat muscles before dining; use universal cuffs or weighted utensils if proximal weakness produces tremor/fatigue.
- Energy Conservation & Work Simplification: Apply the 4 Ps (Prioritize, Plan, Pace, Position); rearrange kitchen/bathroom layouts to place items between waist and shoulder height; sit during grooming and dressing.
- Exercise Prescription Precautions:
- Prescribe low-resistance, non-fatiguing aerobic exercise with frequent rest intervals.
- STRICT CONTRAINDICATIONS: High-intensity resistive strength training, exercising to exhaustion, and exposure to extreme heat (hot showers, saunas, direct sun), which precipitates acute neuromuscular transmission failure.
3. Muscular Dystrophies & Myopathies
Muscular dystrophies are a group of hereditary, progressive degenerative disorders of skeletal muscle fibers resulting from genetic defects in muscle structural proteins.
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| MUSCULAR DYSTROPHY (MD) COMPARATIVE MATRIX |
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| Condition | Inheritance | Key Clinical Characteristics | Core OT Interventions |
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| **Duchenne MD** | X-linked | • Onset: 3–5 years (males). | • Power wheelchair with |
| **(DMD)** | recessive | • Progressive proximal muscle loss. | tilt-in-space seating.|
| | (Dystrophin | • **Gowers' Sign:** Walks hands up | • Passive stretching & |
| | deficiency) | thighs to achieve standing. | night resting splints.|
| | | • **Calf Pseudohypertrophy:** Fibrous| • Scoliosis support, |
| | | fatty deposition in gastrocnemius. | EADLs, adaptive tech. |
| | | • Loss of ambulation by ages 9–12. | • Energy conservation & |
| | | • Progressive cardiopulmonary decline| non-resistive tasks. |
+------------------+---------------+--------------------------------------+-------------------------+
| **Becker MD** | X-linked | • Onset: Late childhood / teens. | • Worksite modifications|
| **(BMD)** | recessive | • Partially functional dystrophin. | • Energy conservation. |
| | (Milder DMD) | • Slower progression; ambulation | • Adaptive ADL devices. |
| | | maintained past age 15–20. | • Joint contracture care|
+------------------+---------------+--------------------------------------+-------------------------+
| **Limb-Girdle** | Autosomal | • Onset: Childhood to adulthood. | • Reachers, dressing |
| **MD (LGMD)** | dom / rec | • Affects proximal shoulder & pelvic | sticks, sock aids. |
| | | girdles (waddling gait, scapular | • Power mobility for |
| | | winging, overhead reach deficit). | distance travel. |
| | | • Preserved distal hand dexterity. | • Home bathroom access. |
+------------------+---------------+--------------------------------------+-------------------------+
| **Facioscapulo-**| Autosomal | • Onset: Adolescence / early adulthood| • Shoulder supports and |
| **humeral MD** | dominant | • Affects face, scapular stabilizers,| functional splinting. |
| **(FSHD)** | | and upper arms. | • Ergonomic desk setup. |
| | | • Scapular winging, sloping shoulders| • Visual/speech adaptive|
| | | inability to whistle or close eyes.| communication tools. |
+------------------+---------------+--------------------------------------+-------------------------+
| **Myotonic MD** | Autosomal | • Onset: Adulthood (Steinert disease)| • Adaptive tools for |
| | dominant | • **Myotonia:** Delayed muscle | grip release / hooks. |
| | | relaxation after contraction (e.g.,| • Balance aids & AFOs. |
| | | unable to let go of doorknob). | • Cognitive & fatigue |
| | | • Distal weakness, cataracts, ptosis.| compensation. |
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4. Post-Polio Syndrome (PPS)
Post-Polio Syndrome refers to a neurological condition affecting polio survivors 15 to 40 years following recovery from acute paralytic poliomyelitis.
Pathophysiology
During initial recovery from polio, surviving motor neurons sprouted collateral axons to reinnervate orphaned muscle fibers, forming enlarged 'giant motor units.' Decades of continuous metabolic overwork cause these overextended terminal axonal sprouts to degenerate, producing progressive denervation and weakness.
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| POST-POLIO SYNDROME CLINICAL PROFILE |
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| CLINICAL MANIFESTATIONS | EVIDENCE-BASED OT INTERVENTIONS |
+-------------------------------------------------+-------------------------------------------------+
| • **New, progressive muscle weakness:** Occurs | • **Energy Conservation & Activity Pacing:** |
| in previously affected AND unaffected muscles.| Implement structured rest intervals throughout|
| • **Profound Generalized Fatigue:** Overwhelming| the day; eliminate non-essential tasks. |
| exhaustion unalleviated by normal sleep. | • **Non-Fatiguing Submaximal Exercise:** Gentle |
| • **Muscle & Joint Pain:** Overuse arthralgias. | aerobic conditioning; **AVOID 'no pain, no |
| • **Severe Cold Intolerance:** Loss of sympathetic| gain' philosophy**! Muscle soreness >30 min|
| vasoconstrictor regulation in extremities. | indicates harmful muscle breakdown. |
| • **Breathing / Swallowing Difficulties:** | • **Assistive Devices & Orthoses:** Lightweight |
| Bulbar respiratory compromise. | carbon-fiber AFOs, canes, power scooters. |
| | • **Thermal Regulation:** Layered warm clothing.|
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5. The 4 Ps of Energy Conservation & Activity Pacing
Energy conservation is foundational across neuromuscular disorders because it reduces excessive fatigue, supports recovery between tasks, and preserves participation.
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| THE 4 Ps OF ENERGY CONSERVATION PROTOCOL |
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| Principle | Practical Clinical Implementation & Occupational Strategies |
+-------------------+-------------------------------------------------------------------------------+
| **1. PRIORITIZE** | • Identify most meaningful occupations; delegate non-essential chores. |
| | • Perform high-priority tasks during peak energy / medication windows. |
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| **2. PLAN** | • Structure daily/weekly schedule to alternate demanding and light tasks. |
| | • Gather all necessary supplies prior to starting an activity (cooking, bath).|
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| **3. PACE** | • Incorporate mandatory rest breaks BEFORE fatigue sets in. |
| | • Maintain a slow, steady rhythm; avoid rushing or burst activity. |
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| **4. POSITION** | • Sit for all possible ADLs (grooming, showering on bench, cooking, ironing).|
| | • Store items between waist and shoulder height to eliminate bending/reaching.|
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Test Your Knowledge
An occupational therapist is developing a rehabilitation program for a client with Guillain-Barré Syndrome who has entered the early recovery phase following 3 weeks in the intensive care unit. The client demonstrates emerging active movement in the shoulder girdle and elbow flexors (Grade 3-/5) but fatigues rapidly. Which exercise principle and intervention strategy is MOST APPROPRIATE at this stage of recovery?
A
B
C
D
Test Your Knowledge
A client with Myasthenia Gravis reports experiencing severe chewing fatigue, difficulty swallowing during evening dinners, and extreme muscle weakness when attempting evening hygiene routines. Which occupational therapy recommendation is MOST EFFECTIVE for addressing these functional difficulties?
A
B
C
D
Test Your Knowledge
An occupational therapist is providing outpatient consultation for a 62-year-old client diagnosed with Post-Polio Syndrome. The client reports severe generalized exhaustion by mid-afternoon, new weakness in the right quadriceps and shoulder girdle, and joint pain after completing household chores. Which occupational therapy intervention plan is MOST BENEFICIAL for this client?
A
B
C
D