Comparison of Atrophy and Glycogen Storage in Some Muscles After Castration and Denervation.

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Abstract
Comparison of weight and glycogen losses in the levator ani and cremaster muscles of the rat was made at several periods after castration and denervation of these muscles. It was found that (1) denervation atrophy is greater in the levator ani than in the cremaster; (2) denervation atrophy is greater than castration atrophy in the levator ani; (3) the loss of glycogen in both muscles after denervation is greater than after castration. Growth of the denervated cremaster muscle continues in the young animal. The loss of glycogen which occurs after denervation (rectus femoris and cremaster) is similar, on a percentage basis, whether the animals are killed in a fed or fasting state. Testosterone and cortisone induces glycogen deposition in some denervated skeletal muscles; the effect of the nerves on this response is quantitative rather than conditioning.