Abstract
This paper presents a single case controlled study of a 75-year-old male having bilateral total knee replacement. Baseline EMG recordings demonstrated differential levels of vastus medialis and vastus lateralis muscle activity in both knees during exercise, with increased vastus lateralis activity compared to vastus medialis activity. The purpose of the study was to use electromyographic (EMG) biofeedback training to train the patient to equalize vastus medialis and vastus lateralis EMG activity during exercise. After 11 and 13 training sessions for the left and right knees, respectively, differences between vastus medialis and vastus lateralis activity had markedly decreased. Following the termination of biofeedback training, EMG activity during exercise showed a return toward baseline levels. Several concomitant changes in psychological and physical function were noted. These results suggested that EMG biofeedback can be used to train vastus medialis and vastus lateralis activity in total knee replacement patients, and that biofeedback training may produce positive benefits in other functional areas.
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The authors wish to express thanks to Dr. Karen Gil for her helpful comments on a draft of this article, and Christianne Herman and Allison Roodman for their help in data collection and entry.
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Beckham, J.C., Keefe, F.J., Caldwell, D.S. et al. Biofeedback as a means to alter electromyographic activity in a total knee replacement patient. Biofeedback and Self-Regulation 16, 23–35 (1991). https://doi.org/10.1007/BF01000443
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DOI: https://doi.org/10.1007/BF01000443