Abstract
In experiments on white rats the character of effect of experimental hyperthyroidism was studied on the skeletal muscle (m. tibialis anterior) of white rats. It is shown that at experimental hyperthyroidism (rectal temperature of 38,5±0,10С) a muscle acquires high functional capabilities. It is shown that the latent period of generation and the time of development of positive wave “М-respones” are (-32%) and (- 22%). The latent period of shortening of muscle diminishes (- 23%) at single contraction. During experimental thyrotoxicosis (rectal temperature of 39,4±0,2 0 С) we observed physiopathological changes in the functional state of skeletal muscle: the lengthening of the latent period of generation of “М-respones” (+21%), an increase in the time of development of positive wave (+54%) and of latent period of shortening of muscle (+14%). It is concluded that in experimental hyperthyroidism and thyrotoxicosis the functional state of skeletal muscle changed in different directions.
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