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Electromyographic Biofeedback Applications to the Hemiplegic Patient: Changes in Lower Extremity Neuromuscular and Functional Status

Dr. Wolf is a senior investigator at the Emory University Rehabilitation Research and Training Center, 1441 Clifton Rd NE, Atlanta, GA 30322 (USA) and Associate Professor, Department of Rehabilitation Medicine, and Assistant Professor, Departments of Anatomy, Surgery and Community Health Sciences, Emory University School of Medicine, Atlanta, GA.
Mr. Binder-Macleod was a research associate, Emory University Regional Rehabilitation Research and Training Center when this paper was written, and is now a doctoral student, Department of Physiology, Medical College of Virginia, Virginia Commonwealth University, Richmond, VA 23298.

The efficacy of EMG biofeedback in improving neuromuscular and functional measures of involved lower extremities in an Experimental Group of chronic stroke patients (n = 7) was examined. Differences in pretreatment-posttreatment measures of the Experimental Group were compared with those of groups of chronic stroke patients receiving no treatment (n = 6), biofeedback treatment of the involved upper extremity only (n = 16), and general relaxation training (n = 8). All examinations were performed in a blind fashion. The Experimental Group showed significant improvement in active range of motion at the knee and ankle that appeared to result from increases in EMG output to muscles governing these movements. Experimental patients did not improve substantially in walking speed over different terrains but did require significantly fewer or less complex assistive devices to walk. Limitations in the design and implementation of this study are provided, and suggestions for future investigation are offered.

Key Words: Biofeedback • Cerebrovascular disorders • Hemiplegic • Leg • Rehabilitation

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