Sakurai G, Ozaki J, Tomita Y, Nakagawa Y, Kondo T, Tamai S
Department of Orthopaedic Surgery, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8521, Japan.
J Orthop Sci. 1998;3(3):137-42. doi: 10.1007/s007760050033.
Morphologic changes in the long head of the biceps brachii (LHB) and bicipital groove associated with cuff tears were studied in 170 cadavers. In specimens with minimum or moderate cuff tears, the primary finding was relative stenosis at the bicipital groove induced by enlargement of the LHB. However, this stenosis was not apparent in specimens with massive cuff tears and in these specimens, the medial wall of the groove exhibited wear and tear, a potential cause of LHB instability. We suggest that the long head of the biceps brachii muscle can potentially compensate for inadequate rotator cuff function. This increasing activity could lead to enlargement of the tendon and cause deterioration of the bicipital gliding mechanism.
在170具尸体上研究了肱二头肌长头（LHB）和肱二头肌沟与肩袖撕裂相关的形态学变化。在肩袖轻度或中度撕裂的标本中，主要发现是LHB增大导致肱二头肌沟相对狭窄。然而，在肩袖严重撕裂的标本中，这种狭窄并不明显，并且在这些标本中，沟的内侧壁出现磨损，这是LHB不稳定的一个潜在原因。我们认为肱二头肌长头有可能代偿肩袖功能不足。这种活动增加可能导致肌腱增大，并导致肱二头肌滑动机制恶化。
