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I believe the muscle that you are refering to may be this one, it is known as an infraspinious muscle

= Infraspinatus muscle = Wikipedia, the free encyclopedia - Cite This Source

The Infraspinatus muscle is a thick triangular muscle, which occupies the chief part of the infraspinatous fossa. It attaches medially to the infraspinous fossa of the scapula and laterally to the greater tubercle of the humerus. It arises by fleshy fibers from its medial two-thirds, and by tendinous fibers from the ridges on its surface; it also arises from the infraspinatous fascia which covers it, and separates it from the Teres major and minor. The fibers converge to a tendon, which glides over the lateral border of the spine of the scapula, and, passing across the posterior part of the capsule of the shoulder-joint, is inserted into the middle impression on the greater tubercle of the humerus. The tendon of this muscle is sometimes separated from the capsule of the shoulder-joint by a bursa, which may communicate with the joint cavity. It is a lateral rotator of the glenohumeral joint and adductor of the arm. The Infraspinatus and Teres minor rotate the head of the humerus outward (external rotation); they also assist in carrying the arm backward. == ==

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16y ago
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Q: What is the infraspinolis muscle?
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