Recovery in the Severely Impaired Arm Post-Stroke After Mirror Therapy: A Randomized Controlled Study

Area of Science:

• Neurorehabilitation
• Stroke Recovery
• Motor Rehabilitation

Background:

• Stroke frequently results in severe upper limb impairment, significantly impacting patient independence.
• Early rehabilitation is crucial for motor recovery in the subacute phase post-stroke.
• Mirror therapy is a potential intervention to enhance motor function, but its efficacy in severe impairment requires further investigation.

Purpose of the Study:

• To evaluate the effectiveness of mirror therapy compared to a control therapy for arm recovery in patients with severe hemiparesis after stroke.
• To assess the impact of mirror therapy on motor function using standardized outcome measures.

Main Methods:

• A single-blind randomized controlled trial was conducted with 41 patients within 1 month post-stroke.
• Participants were assigned to either mirror therapy (n=20) or control therapy (n=21) for 4 weeks, 30 minutes twice daily, alongside conventional rehabilitation.
• Both groups performed similar structured bimanual exercises; the mirror therapy group used visual feedback from the unaffected limb's reflection, while the control group did not use a mirror.

Main Results:

• Both mirror therapy and control therapy groups demonstrated significant improvements in arm motor function.
• There were no statistically significant differences between the mirror therapy and control therapy groups in Fugl-Meyer Assessment scores (P = 0.867).
• Similarly, no significant differences were observed in Wolf Motor Function Test-Time (P = 0.947) or Wolf Motor Function Test-Functional Ability Scale (P = 0.676) between the groups.

Conclusions:

• Mirror therapy and control therapy, involving concurrent exercises for both paretic and unaffected arms during the subacute stroke phase, yield comparable motor recovery in the severely impaired arm.
• These findings suggest that structured bimanual exercise, with or without mirror visual feedback, can effectively promote motor recovery in this patient population.