A physiological study on denervated atrophy of skeletal muscle.

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概要

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• We examined the physiological changes of extensor digitorum longus (EDL) and soleus (SOL) muscle in rats caused by nerve transection.The wet weight of the denervated SOL muscle was further reduced than that of EDL muscle.Diameters of the muscle fibers which were obtained of the denervated muscles, were on the decrease and the averages of the both muscles were equal after one week. The maximal tension developed by the denervated single muscle fiber was lower and less than one half of the control muscle after 2 weeks. According to classification by types of muscle fibers using a single skinned muscle fiber method, conversion of type I into type II and type X was noted on the denervated muscle. No abnormalities were found in calcium ion uptake by the sarcoplasmic reticulum.It was concluded from the present study that the denervated atrophy of skeletal muscle was induced not only reduction of muscle fibers in diameter and tension but also conversion to muscle proteins and immature muscle fibers.

• 社団法人 日本リハビリテーション医学会の論文

社団法人 日本リハビリテーション医学会 | 論文

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