Histochemical study of skeletal muscles of the frog, Rana temporaria

Histochemical profiles of muscles were identified based on staining for myosin ATPase activity. They reveal typical arrangement of muscular fibres with a zoned pattern. Tonic fibres have a unique histochemical profile and are mixed with the most oxydative fast fibres to form toxic zones. Muscles show fast profiles in thigh and tonic or mixed profiles in fore-arm.