桡神经肱肌支的解剖学研究

An anatomical study of the brachialis branch of radial nerve

目的：研究桡神经的肱肌支的形态特点。方法：对７２侧固定尸体的桡神经肱肌支进行解剖与测量，并分为三种不同的类型进行比较。结果：桡神经存在肱肌支出现率为５１．４％（３７侧）。肱肌支的出现以单侧多见，与性别、侧别无关。对肱肌支的起始点、入肌点、长度及横径测量结果，将其归分为：上升型、下降型和水平型三种类型。肌支的起始点在Ｈｕｅｔｅｒ＇ｓ线上３．０～９．６ｃｍ，入肌点在Ｈｕｅｔｅｒ＇ｓ线下０．２～线上９．５ｃｍ，肌支长度０．７～９．６ｃｍ，横径为０．４～２．０ｍｍ。结论：桡神经的肱肌支较普遍存在，行上臂、肘部手术时，应对其加以保护。

Objective:To study the morphological character of the brachialis branches of radial nerve. Methods: Seventy two upper extremities of fixed human cadavers were dissected.The brachialis branches of radial nerve were measured and divided into three types: ascending,descending, horizontal.Results: The brachialis branch of radial nerve were occurred in 37 specimens with the occurrence rate of 51.39%. The branches were often in single side of extremities and had no relationship to sex and side of extremity.The origins of the branches, the points of the branches entering the muscle, the length of the branches, the diameter of the branches were all measured. The origin of the branches is 3.0 9.5 cm above Hueters line,the point entering the muscle is between 0.2 mm above Hueter′s line and 9.5 mm below Hueter's line the length of the branches was 0.7 9.6 mm with the diameter of 0.4 2.0 mm.Conclusions:The brachialis branch of the radial nerve was a co mmon phenomenon. It must be protected when the operation of the upper arm or the elbow was performed, especially to patients whose musculocutaneous nerves had been injured.