抄録
3 ligaments are known to stabilize the glenohumeral joint: superior glenohumeral ligament (SGHL), middle glenohumeral ligament (MGHL), and inferior glenohumeral ligament (IGHL-AB). Here, we compared the histological structure of these 3 ligaments. 5 shoulders of 3 cadavers were dissected. 3 blocks that contained SGHL, MGHL and IGHL-AB were embedded in paraffin from each cadaver. Serial sections were stained histologically. Types 1 and 3 anti-collagen antibodies were applied to identify the fibers. MGHL and IGHL-AB consisted of parallel compact collagen fibers. They were stained dark with anti-type 1 and type 3 collagen antibodies. Connective tissue observed between long head of the biceps tendon (LHB) and tendon of subscapularis (SSC) was intermingled by compact and less compact fibers. The part close to LHB was relatively thick. These fibers were stained dark only with an anti-type 3 collagen antibody. This area was thought to contain SGHL and CHL from macroscopic observation, whereas the border between them were unclear. SGHL is thought to be a part of CHL extended into the space between LHB and SSC. From the histrogical study, MGHL and IGHL-AB had typical ligament structure, however, SGHL did not have a typical ligament structure. As CHL itself, SGHL turned out to be a loose connective tissue extended from CHL.
