Flatow E L, Bigliani L U, April E W
College of Physicians and Surgeons, Columbia University, New York, New York.
Clin Orthop Relat Res. 1989 Jul(244):166-71.
The anatomy of the musculocutaneous nerve was investigated to determine its relationship to the coracoid process. The distance from the coracoid to the point of entrance of the main nerve trunk into the coracobrachialis muscle ranged from 31 to 82 mm, with a mean of 56 mm. Small nerve twigs to the coracobrachialis (proximal to the main nerve trunk) entered the muscle as close as 17 mm below the coracoid, with an average of 31 mm. The frequently cited range of 5-8 cm below the coracoid for the level of penetration cannot be relied on to describe a safe zone because 29% of the nerves entered the muscle proximal to 5 cm below the coracoid (74% if the proximal twigs are counted). If coracoid mobilization is necessary, the musculocutaneous nerve and its twigs should be identified and protected, keeping in mind the variations in anatomy and the level of penetration.
对肌皮神经的解剖结构进行了研究，以确定其与喙突的关系。从喙突到主要神经干进入肱二头肌短头肌的点的距离在31至82毫米之间，平均为56毫米。至肱二头肌短头肌（在主要神经干近端）的小神经分支在喙突下方低至17毫米处进入该肌肉，平均为31毫米。经常引用的喙突下方5 - 8厘米的穿透水平范围不能用来描述一个安全区域，因为29%的神经在喙突下方5厘米近端进入肌肉（如果计算近端分支则为74%）。如果需要进行喙突松动术，应识别并保护肌皮神经及其分支，同时牢记解剖结构的变异和穿透水平。
