“…In spite of increasing understanding of movement disorders and reported improvements in all therapeutic modalities, the benefits of these treatments continue to be controversial, largely because the 413 19841 171, 413-427 NumBER4 (wmTm 1984) literature lacks documentation of the biological mechanisms for specific neuromuscular disorders and because of the lack of well-designed research studies on treatment effects. Within the past 10 years, electromyographic (EMG) feedback has been developed and frequently used as an alternative or adjunctive therapy for neuromuscular disorders (Basmajian, Gowland, Brandstater, Swanson, & Trotter, 1982;Brudny et al, 1976;Cataldo, Bird, & Cunningham, 1978;Finley, Niman, Standley, & Ender, 1976;Inman, 1979;Martin, 1981;Ortega, 1978;Prevo, Visser, & Vogelaar, 1982;Wolf, Baker, & Kelly, 1980;Wolf & Binder-MacLeod, 1983). Operant conditioning procedures not using biofeedback equipment, although frequently applied to other problems, have not often been used to improve motor control of the physically handicapped, despite reports in the literature of a few successfully treated cases (Ball, McCrady, & Hart, 1975;Block, 1978;Garber, 1971;Martin & Sachs, 1973;Sachs & Mayhall, 1971; Thompson, Iwata, & Poynter, 1979).…”