MAIN OUTCOME MEASURES: mechanical characters of elongation and mechanical characters of viscoelasticity of superior trunk of brachial plexus nerve.
主要观察指标：臂丛神经上干的拉伸力学性质和黏弹性力学性质。
Superior trunk of brachial plexus nerve was performed stress relaxation test and creeping test, and data and curve of stress relaxation test and creeping test were obtained.
对臂丛神经上干进行应力松弛实验和蠕变实验，得出应力松弛、蠕变实验数据和曲线。
Objective To investigate the treatment outcome of nerve transfer in root avulsion injury of brachial plexus upper trunk.
目的阐明神经移位治疗臂丛上干根性撕脱伤的疗效。
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