Representative bursal-surface view of rotator cuff muscle-tendon units and their anatomical insertion sites. Unlike hominoids, such as humans, chimpanzees, and orangutans, the vervets did not have a “true” rotator cuff which is indicated by a lack of distinction between the tendon insertion sites of the supraspinatus, infraspinatus, subscapularis, and teres minor.40 No tears were discovered during dissection.