[Histochemical characterization of the tonic fibers in the flexor carpi radialis muscle of frogs (Rana temporaria, L.)].

In the flexor carpi radialis muscle of the Frog, extra-fusal muscular fibres with histochemical characteristics of tonic fibres were identified by reactions for enzyme activities, especially for myofibrillar adenosine triphosphatase. This evidence suggests no difference between the sexes in the organization of this muscle, in spite of a strongly marked sexual dimorphism.