Letters to the editor

✍ Scribed by Akio Tsubahara; Naoich Chino; Kiyorhi Mineo; MD; FACP Myron M. Laban; James W. Albers; Peter D. Donofrio; Steven R. Levine; Timothy K. McGonagle; P. Yontagna; E. Lugaresi; F. Cirignotta; G. Coccanay; H. A. C. Kamphuisen

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 415 KB
• Volume: 13
• Category: Article
• ISSN: 0148-639X
• DOI: 10.1002/mus.880131015

✦ Synopsis

Fibrillation potentials are useful findings in the clinical electrodiagnosis of patients with lower motor neuron lesions. No experimental studies making clear the relationship between fibrillation potentials and muscle fiber type have been performed since Denny-Brown and Pennybacker' observed that no difference existed between fibrillation activities in the soleus and gastrocnemius of the cat. However, the amplitude of the recorded electrical change, which was between 1 and 3 microvolts, was smaller than that of fibrillation potentials ordinarily recorded in clinical electromyography (EMG).

Recently, we began preliminary studies consisting of both electrophysiological and histochemical experiments in denervated muscles to determine whether fi-1 -