Constraint-Induced Movement Therapy for Stroke Recovery

Constraint-Induced Movement Therapy (CIMT) is an evidence-based rehabilitation approach designed to improve upper limb function after stroke. By restricting the use of the unaffected arm, CIMT forces the affected limb to engage in repetitive, task-specific practice, encouraging neuroplasticity and functional recovery.

Mechanism of Action

Forced Use: The unaffected arm is restrained with a mitt or sling, compelling the use of the weaker arm.
Neuroplasticity: Intensive practice enhances cortical reorganisation, strengthening motor pathways.
Task-Specific Training: Patients perform meaningful daily activities, improving carryover into real-life function.
Overcoming Learned Non-Use: Encourages patients to re-engage the affected limb rather than relying on compensation.

Protocols and Parameters

Constraint Time: Typically 90% of waking hours for 2–3 weeks.
Training Intensity: 2–6 hours of supervised practice daily, focusing on functional tasks.
Modified CIMT (mCIMT): Less intensive (e.g., 3–6 hours of restraint per day, shorter therapy sessions).
Activities: Grasping objects, self-care tasks, reaching, and fine motor skill retraining.

Clinical Applications

Stroke Survivors: Most effective in patients with some active wrist and finger extension.
Traumatic Brain Injury: Can be adapted for upper limb rehabilitation.
Paediatrics: Used in children with cerebral palsy to improve unilateral hand function.
Chronic Phase Stroke: Benefits extend beyond the acute stage, improving long-term outcomes.

Evidence and Effectiveness

Numerous RCTs show CIMT significantly improves upper limb function and daily living performance.
Long-term studies highlight sustained functional gains months to years post-intervention.
Modified CIMT protocols have increased accessibility for patients unable to tolerate intensive schedules.

Safety and Contraindications

Requires adequate cognitive function and motivation to participate in high-intensity practice.
Not suitable for patients with severe spasticity, joint pain, or complete paralysis of the affected limb.
Compliance is essential; frustration and fatigue may occur, requiring careful therapist monitoring.

Conclusion

Constraint-Induced Movement Therapy (CIMT) is a powerful, evidence-based intervention for stroke recovery. By driving neuroplasticity through forced use and intensive practice, CIMT significantly enhances upper limb function and independence in daily activities.

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