Rotator Interval

The rotator cuff interval is a triangular space situated between the supraspinatus and subscapularis tendons [Figure 17]. [70] Its margins are defined by a number of different landmarks and muscles. [71]

Through arthroscopy, the insertions of the various components of the rotator cuff interval can be seen: superior gleno-humeral ligament, media head of the coracohumeral ligament and subscapularis tendon. [72] In a cadaveric study, Tetro et al [73] commented on the dimensions of the rotator cuff interval, stating “the distance from the anterior edge of the supraspinatus to the superior edge of the subscapularis at the level of the glenoid rim was 21.6 mm and increased to 27.8 mm with joint distension”.


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