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Title: Electromyographic (EMG) feedback in chronic musculoskeletal pain: a controlled trial. Author: Large RG, Lamb AM. Journal: Pain; 1983 Oct; 17(2):167-177. PubMed ID: 6359018. Abstract: The literature regarding the application of EMG feedback training in musculoskeletal pain disorders is reviewed. A within-subject control trial of EMG feedback using a counterbalanced design in patients with chronic musculoskeletal pain is reported here. Eighteen subjects (12 females and 6 males) were studied in terms of subjective reports of pain and EMG activity measurement under standardised conditions. Both EMG feedback and a control condition were active in reducing subjective pain levels, which increased during a waiting list conditions in certain sequences. EMG activity declined during both EMG feedback and control conditions but only EMG feedback resulted in an orderly reduction in EMG baseline measurements with a highly significant linear trend when presented before the control condition in sequence. A significant correlation between subjective pain levels and surface EMG activity was found. These data suggest that EMG feedback is superior to a control condition in training muscle relaxation but not in reducing subjective pain levels despite a high correlation between these two parameters. Non-specific factors may well affect pain scores and further research is required before the specific biofeedback training effect can be accepted as superior to its non-specific effects in reducing subjective pain.[Abstract] [Full Text] [Related] [New Search]