Managing Spasticity in Multiple Sclerosis: Stretching & Positioning Guidelines

Introduction to Multiple Sclerosis Spasticity

Spasticity is one of the most common symptoms of multiple sclerosis (MS), affecting an estimated 60% to 80% of individuals at some point during the course of the disease. In MS, autoimmune-mediated demyelination and axonal damage disrupt the upper motor neuron pathways in the brain and spinal cord. Without normal descending inhibition from these central pathways, spinal reflex loops become hyperexcitable, leading to involuntary muscle tightness, painful spasms, and stiffness.

Spasticity in multiple-sclerosis most frequently affects the lower limbs, specifically the calf muscles, hamstrings, quadriceps, and hip adductors. Left unmanaged, persistent spasticity can lead to permanent structural shortening of the muscle tissue (contracture), skin breakdown, pain, and a significant decline in walking ability. A comprehensive neuro-rehabilitation program focusing on ms spasticity stretching rehabilitation and clinical positioning guidelines is essential to manage these symptoms and preserve mobility.

The Neurobiology of Spasticity: Why Velocity Matters

To stretch spastic muscles effectively, it is critical to understand the velocity-dependent nature of the stretch reflex. Inside muscle tissue, sensory receptors called muscle spindles monitor how fast and how far a muscle is stretched.

In a healthy nervous system, these signals are regulated. In MS:

1. The loss of descending inhibitory signals leaves the spinal cord reflexes hyper-responsive.
2. If a spastic muscle is stretched quickly, the hyperactive muscle spindles trigger a rapid, involuntary contraction (a spasm).
3. Therefore, stretches must be performed slowly and held for a prolonged period (30 to 60 seconds). A slow stretch avoids triggering the velocity-dependent reflex, allowing the muscle fibers to relax and elongate.

Seating and Sleeping Positioning Guidelines

Stretching exercises alone are insufficient if a patient spend the rest of the day in positions that encourage muscle shortening. Proper positioning is a 24-hour consideration:

• Seating (90-90-90 Position): When sitting in a wheelchair or chair, ensure the hips, knees, and ankles are positioned at 90-degree angles. Use footplates or ankle-foot orthoses (AFOs) to keep the feet flat, preventing the calf muscles from shortening.
• Sleeping Positions: Avoid sleeping in a fetal position (hips and knees bent), which promotes contractures. If side-sleeping, place a pillow between the knees to prevent the hip adductors from pulling the legs together (scissoring). If sleeping on the back, place a small pillow under the knees to prevent hyperextension, but keep the hips straight.
• Orthotic Splinting: Use resting splints or night splints to hold the wrist, fingers, or ankles in a prolonged, low-load stretch while sleeping.

Guided Stretching Exercises for MS

Safety Warning: Perform all stretches slowly. Stop immediately if you experience sharp pain or a severe spasm.

1. Calf Stretch (Gastrocnemius and Soleus)

• Execution: Stand facing a wall, arms extended. Step one foot back, keeping the heel flat on the floor and the knee straight. Bend the front knee, leaning toward the wall until a stretch is felt in the back calf of the rear leg. Hold for 45–60 seconds. Repeat 3 times per side. To stretch the deeper soleus muscle, perform the same stretch with a slight bend in the rear knee.
• Goal: Prevent ankle contracture and reduce foot drop.
• Link: This is a core stretch in clinical physiotherapy.

2. Seated Butterfly Stretch (Hip Adductors)

• Execution: Sit on a mat with knees bent and the soles of the feet touching. Grasp the ankles and gently press the knees toward the floor using the elbows. Keep the spine straight. Hold for 45 seconds. Repeat 3 times.
• Goal: Prevent hip tightness and scissoring gait patterns.

3. Doorway Hamstring Stretch

• Execution: Lie on your back in a doorway, with one leg extended flat on the floor through the opening, and the affected leg raised up against the door frame. Slide the hips closer to the frame to increase the stretch in the back of the thigh. Hold for 60 seconds. Repeat 3 times.
• Goal: Safely lengthen the hamstrings without straining the lower back.

4. Continuous Passive Motion (CPM)

• Execution: For patients with severe spasticity or limited voluntary movement, clinicians utilize a continuous-passive-motion machine. This device slowly and rhythmically moves the legs through a set range of motion, helping to lower spinal reflex excitability.
• Goal: Lubricate joints and reduce spasticity in inactive limbs.

Comparison of Spasticity Management Interventions

| Intervention | Mechanism | Target Muscle Groups | Recommended Frequency | | :--- | :--- | :--- | :--- | | Sustained Stretching | Inhibits muscle spindle reflexes, elongates tissues | Calves, Hamstrings, Adductors | 2–3 times daily | | Seating Modifications | Maintains alignment, prevents gravity shortening | Core, Hips, Ankles | Continuous during day | | Orthotic Splinting | Low-load, long-duration mechanical stretch | Wrists, Fingers, Ankles | 6–8 hours (overnight) | | Continuous Passive Motion | Rhythmic articulation, lowers reflex excitability | Lower limb joints | 30–60 minutes daily |

Common Spasticity Triggers

Spasticity can worsen suddenly in response to external irritants. Patients and caregivers should monitor and manage these common triggers:

• Infections: Urinary tract infections (UTIs) are a primary trigger that can cause a sudden spike in muscle spasms.
• Skin Irritation: Ingrowing toenails, pressure sores, tight clothing, or skin rubbing can increase reflex spasms.
• Temperature Extremes: Sudden exposure to very cold or hot weather can temporarily worsen muscle stiffness.