Snow Brian J, Narvy Steven J, Omid Reza, Atkinson Roscoe D, Vangsness C Thomas
Orthopedics. 2013 Oct 1;36(10):e1295-8. doi: 10.3928/01477447-20130920-23.
The classic literature describes the transverse humeral ligament (THL) as a distinct anatomic structure with a role in biceps tendon stability; however, recent literature suggests that it is not a distinct anatomic structure. The purpose of this study was to evaluate the gross and microscopic anatomy of the THL, including a specific investigation of the histology of this ligament. Thirty frozen, embalmed cadaveric specimens were dissected to determine the gross anatomy of the THL. Seven specimens were evaluated histologically for the presence of mechanoreceptors and free nerve endings. Two tissue layers were identified in the area described as the THL. In the deep layer, fibers of the subscapularis tendon were found to span the bicipital groove with contributions from the coracohumeral ligament and the supraspinatus tendon. Superficial to this layer was a fibrous fascial covering consisting of distinct bands of tissue. Neurohistology staining revealed the presence of free nerve endings but no mechanoreceptors. This study's findings demonstrate that the THL is a distinct structure continuous with the rotator cuff tendons and the coracohumeral ligament. The finding of free nerve endings in the THL suggests a potential role as a shoulder pain generator.
经典文献将肱横韧带（THL）描述为一种在肱二头肌肌腱稳定性方面起作用的独特解剖结构；然而，近期文献表明它并非一种独特的解剖结构。本研究的目的是评估THL的大体和微观解剖结构，包括对该韧带组织学的具体研究。解剖了30个冷冻、防腐处理的尸体标本以确定THL的大体解剖结构。对7个标本进行了组织学评估，以检测机械感受器和游离神经末梢的存在情况。在被描述为THL的区域识别出两层组织。在深层，发现肩胛下肌腱的纤维跨越肱二头肌沟，并有喙肱韧带和冈上肌腱的纤维加入。在该层表面是一层由不同组织带组成的纤维筋膜覆盖物。神经组织学染色显示存在游离神经末梢，但未发现机械感受器。本研究结果表明，THL是一种与肩袖肌腱和喙肱韧带连续的独特结构。在THL中发现游离神经末梢提示其可能作为肩部疼痛产生源发挥作用。
