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目的：研究肱二头肌和三角肌肌支在臂丛中的定位。方法：通过对１０具尸体双侧肱二头肌及三角肌肌支的解剖，观察其纤维定位，并测定其截面积。结果：在腋部肱二头肌和三角肌肌支分别位于相应神经的外侧份，其截面积分别占主干截面积的３４％和５３％。在锁骨上，肱二头肌肌支位于上干前股的前正中和前外侧份，其截面积占上干前股的３４％，三角肌肌支位于上干后股的后正中和后外侧份，其截面积占上干后股的３７％。结论：在神经移植或移位手术中，应尽可能将动力神经缝接至肌支相应的神经束上，以提高疗效。
Objective: To study the location of biceps and deltoid muscular branches in brachial plexus. Methods: Anatomy of the bilateral biceps and deltoid musculature of 10 corpses was observed. The fiber localization was observed and its cross-sectional area was measured. Results: The axillary biceps and deltoid muscular branches were located on the outer side of the corresponding nerves, respectively, and their cross-sectional area accounted for 34% and 53% of the main cross-sectional area, respectively. On the clavicle, the biceps musculocutaneous branch is located in the anterior and medial anterior lateral portions of the anterior superior femoral shaft, with a cross-sectional area accounting for 34% of the anterior posterior femoral shaft. The deltoid muscular branches lie posterior median and posterolateral Copies, the cross-sectional area accounted for 37% of the shares after the dry. Conclusion: In nerve transplantation or shift surgery, motor nerve should be sutured to the corresponding nerve bundle of muscular branch as much as possible to improve curative effect.