Mirror Box Training in Hemiplegic Stroke Patients Affects Body Representation

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Human Motor Control

Background:

• The brain integrates multisensory information to create body representations.
• Post-stroke motor deficits can impair body representation, worsening disability.
• Altered body representation is a potential target for rehabilitation.

Purpose of the Study:

• To investigate the effect of Mirror Box (MB) therapy on body representation in post-stroke patients.
• To assess if MB therapy can correct metric distortions in the representation of the affected limb.

Main Methods:

• 45 post-stroke patients participated in the study.
• A forearm bisection task measured body representation before and after MB training.
• Two conditions were tested: with the mirror and direct viewing of the impaired limb.

Main Results:

• Baseline measurements showed a proximal shift in forearm bisection, indicating a shrunken representation of the affected limb.
• After MB therapy, bisection scores shifted distally, suggesting partial correction of the limb's metric representation.
• Effects varied based on lesion laterality and illness duration.

Conclusions:

• Mirror Box therapy shows potential as a tool to improve altered body representation in post-stroke motor impairments.
• MB therapy may help restore a more accurate spatial and metric representation of the affected limb.
• Further research is warranted to explore MB therapy's efficacy across different patient profiles.