目的比较全长膈神经移位至上臂段桡神经前臂支不同部分恢复伸腕、指功能的效果。
Objective to evaluate the effect of full length phrenic nerve transfer to different portion of the radial nerve for restoration of wrist and finger extension.
而后上臂的肱三头肌则是一块伸肌，当它运动时，肘部就伸直，而前臂和手就离开了肩部。
The tricepes muscle in the back of the upper arm is an extensor. When it contracts, the elbow strainghtens and the forearm and hand move away from the shoulder.
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