肌皮神经至正中神经交通支变异的发生率国内文献为14.29％,9.25％,10.2％,交通支粗细介于0.5～2.0mm,长1.7～13.5cm,多为外内侧交通支,也见有正中神经连于肌皮神经的交通支。国外文献其发生率为13.9％,甚至有高达36％。交通支的性质有文献认为是纯感觉性的,有人于手术 The incidence of musculocutaneous nerve to median nerve branch was 14.29%, 9.25% and 10.2% respectively. The thickness of traffic branch was 0.5 ~ 2.0mm and length was 1.7 ~ 13.5cm, The median nerve connected to the musculocutaneous nerve transport branch. The incidence of foreign literature was 13.9%, and even up to 36%. The nature of the traffic branch literature that is purely sensual, some surgery