Effect of the Mirror Visual Feedback on sensory reeducation outcomes after median/ ulnar nerve repairs

The Mirror Visual Feedback (MVF) is a relatively new intervention that focuses on the observation of healthy hand gestures in the mirror to improve damaged hand motion. This approach is based on the concept of central representation of phantom or affected limb. The aim of the present study was to determine the effect of Mirror Therapy as a supplementary approach on Sensory re-education outcomes after median/ ulnar nerve repair.
In a randomized controlled trial, 10 patients (mean age 32 years) with repaired median/ulnar nerves were selected from the available community and were randomly assigned using random cards in to intervention and control groups. Both groups received traditional rehabilitation program, three times a week, each time for 40 minute. In addition, intervention group received Mirror Therapy, 15 minutes a day, 5 days a week, for 8 weeks. outcome measures Semmes-Weinstein Monofilaments (SWMS) and Two Points Discrimination (TPD) were given to check the status of superficial sensation and Stereognosis for sensory function prior to (4-6th week after surgery) and after the (12th week after surgery) treatment.
The SWMS and TPD scores significantly improved in the post test in both groups; however, Mirror Therapy exhibited significantly greater changes in the SWMS and TPD scores compared with that in control group ( p≤ .o5(
The MVF, in combination with traditional sensory reeducation program, produced more improvement in the superficial sensation and sensory function compared with that in the control group in the first phase of sensory reeducation. This may be due to the potential of cerebral neuroplasticity, stimulation of somatosensory areas, and motor network, modulation of cerebral reorganization and also prevention of further changes.