Electromyographic Study of Patterns of Activity of the Adbominal Wall Muscles in Man
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- 手島 英
- Prof. M. Muto's Surgical Clinic, Tohoku University
抄録
With 50 normal humans, electromyographic study by means of surface electrodes was made on the activity of the abdominal wall muscles in various postures and during various movements.<br> 1. In the supine position, whether with the legs drawn up or with the legs extended, no discharge due to muscular activity was recognized. Gentle pressure applied to the abdominal wall also did not evoke discharge.<br> 2. During the movement of flection and extension of the trunk (such as head raising from the supine position and backward leaning in the standing position) there was seen a remarkable discharge mainly in the recti. In those cases in which the abdomen was strained (such move-ments as deliberate application of a strain to the abdomen in the supine position, deep breathing, voicing, and sitting with the legs extended), remarkable discharges were seen in the external and internal obliques.<br> 3. The electromyographic patterns of activity for sitting straight in Japanese fashion, sitting cross-legged, sitting on a chair were essentially the same as that obtained in the supine position at rest. In the standing position at rest, on the other hand, there was seen a discharge 10-15 μV in amplitude in the internal obliques; in the position of sitting with the legs extended, slightly increased discharges in the internal and external obliques (10-20, 15-20 μV respectively) and in the lower part of the recti (5-15 μV), as compared with the discharges in the supine position at rest.<br> 4. There was seen in the recti a tendency that discharge was apt to appear in the middle, lower, and upper parts in order of increasing readiness.
収録刊行物
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- The Tohoku Journal of Experimental Medicine
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The Tohoku Journal of Experimental Medicine 67 (2-3), 281-292, 1958
東北ジャーナル刊行会