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. 1986 May 23;66(3):346-50.
doi: 10.1016/0304-3940(86)90044-3.

Histochemical identification of two fibre types in the retractor bulbi muscle of the cat

J P Guéritaud, G Horcholle-Bossavit, L Jami, D Thiesson, S Tyc-Dumont

Histochemical identification of two fibre types in the retractor bulbi muscle of the cat

J P Guéritaud et al. Neurosci Lett. .

Abstract

In adult cats, the fibre population of the retractor bulbi muscle (RB) was analysed, using the histochemical reactions of ATPases. The muscle was found to contain type-2 fibres only, of which 70% were 2a and 30% 2b. Such ATPase profiles, corresponding to fast-twitch fibers, are in agreement with the mechanical properties of the muscle. Both types, 2a and 2b, included fibres in which the oxidative enzyme content was high and fibres in which it was low. The glycogen content of all fibers in the RB was uniformly low.

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