Fibrillation potentials do not originate in type 1 muscle fibers?
Electromyogr Clin Neurophysiol
; 31(5): 311-5, 1991 Aug.
Article
em En
| MEDLINE
| ID: mdl-1915040
Electrophysiological and muscle histochemical studies of denervated muscle were performed simultaneously in order to determine the relationship between fibrillation potentials and muscle fiber type. Fibrillation potentials recorded in the soleus muscle 2 weeks after resection of the sciatic nerve revealed a lower firing rate than in the extensor digitorum longus (EDL) muscle of the same rats. The majority of muscle fibers stained for adenosine triphosphatase (ATPase) activity after preincubation at pH 9.4, 4.6, and 4.3 in the soleus muscle were type 1 fibers, while most of those in the EDL were of type 2. Moreover, one of the rats, which demonstrated no fibrillation potentials in the soleus muscle, was found to have no type 2A or 2B fibers histochemically, in the same soleus muscle. These findings suggest that fibrillation potentials may not originate in type 1 fibers.
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Base de dados:
MEDLINE
Assunto principal:
Músculos
Limite:
Animals
Idioma:
En
Revista:
Electromyogr Clin Neurophysiol
Ano de publicação:
1991
Tipo de documento:
Article
País de afiliação:
Japão