EFFECT OF OVERLOAD ON ULTRASTRUCTURE OF STRIATED-MUSCLE IN JAPANESE-QUAIL

The effects of hypergravitation, hypodynamia and their combined action during 6 days on the striated muscle ultrastructure of m. gastrocnemi us in Japanese quails were studied. Cockerels at the age of 48 days we re divided into 5 groups. They were exposed to hypergravitaty of 2 G i n a centrifuge, hypodynamia, and combined hypergravitaty and hypodynam ia, in the centre of a centrifuge, and they were compared to a control group. Comparing the morphological picture of striated muscle of Japa nese quail in all experimental groups, we concluded that the action of different stress factors during 6 days did not cause substantial chan ges in the basic morphological structure, except for the groups placed in the centre of the centrifuge and the one with combined hypergravit aty and hypodynamia where they had been most strongly exposed to loadi ng.