An electrophysiological investigation of skeletal muscles in polymyositis

Investigação eletrofisiológica de músculos esqueléticos na polimíosite

An electrophysiological investigation of skeletal muscles in polymyositis

Investigação eletrofisiológica de músculos esqueléticos na polimíosite

R. E. P. Sica^II; Olga P. Sanz^I; Nidia Aguilera; A. Colombi^II

^ISección de Electroneurofisiología Clínica, Neurologia, Hospital Ramos Mejia, Buenos Aires, Argentina: Municipalidad de la Ciudad de Buenos Aires

^IISección de Electroneurofisiología Clínica, Neurologia, Hospital Ramos Mejia, Buenos Aires, Argentina: Research fellow, Municipalidad de la Ciudad de Buenos Aires

SUMMARY

An electrophysiological study has been made of the extensor digitorum brevis, thenar and hypothenar muscles in 25 patients with chronic and acute polymyositis. It was found a reduction of the number of functioning motor units in some patients with chronic polymyositis and only in one of those affected by acute polymyositis. The sizes of the surviving units suggested that the results could be explained in terms of a primary muscle involvement mainly in acute polymyositis, while in chronic polymyositis a combination of primary and neurogenic involvement of muscle fibers might take place.

RESUMO

Foi feito estudo eletromiográfico do curto extensor dos dedos e dos músculos tenares e hipotenares em 25 pacientes com polimíosite crônica e aguda. Foi encontrada diminuição no número de unidades motoras funcionantes em alguns pacientes com polimíosite crônica e somente em um caso de polimíosite aguda. Os tamanhos das unidades restantes sugerem que os resultados podem ser explicados em termos de um envolvimento primário dos músculos especialmente na polimiosite aguda, ao passo que na polimiosite crônica ocorre uma combinação de acometimento primário e neurogênico.

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2. BAUWENS, P. 1949 — Quoted by COÉRS & WOOLF, 1959.

Sección de Electroneurofisiología — Hospital Ramos Mejia — Urquiza 609 — Buenos Aires — Argentina.

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Publication Dates

• Publication in this collection
  25 Feb 2013
• Date of issue
  Dec 1976