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July 1957

Electromyographic Findings in Dermatomyositis

Author Affiliations


From the Section on Physical Medicine, Department of Pharmacology and Therapeutics, Stritch School of Medicine of Loyola University, and Cook County Hospital.

AMA Arch Derm. 1957;76(1):91-95. doi:10.1001/archderm.1957.01550190095017

Definitive information on the electromyographic findings associated with dermatomyositis, or even generalized myositis, are not common in the literature. In the case of the somewhat ill-defined syndrome of dermatomyositis, which term is often used synonymously with acute polymyositis, only three references have been found, which describe, in any detail, electromyographic findings associated with this disease: Guy et al.,1 Buchtal and Pinelli,2 and O'Leary et al.3 In addition to providing definitive electromyographic data, it seemed that a study of this clinical condition, if really limited to muscle inflammation, and not primarily involving neurological elements, would offer an approach to a separation of the contributions of the muscular and the neurological components of the electromyographic picture.

Dermatomyositis is probably best described as an inflammatory reaction of skeletal muscles, accompanied by an acute or subacute degeneration. Changes in the skin may also be