Subscapularis muscle
Subscapularis muscle is a large triangular muscle which fills the subscapular fossa and inserts into the lesser tubercle of the humerus and the front of the capsule of the shoulder-joint.
Anatomy[edit | edit source]
The Subscapularis muscle originates from the subscapular fossa on the anterior surface of the scapula bone. It is inserted into the lesser tubercle of the humerus. The muscle is innervated by the subscapular nerves.
Function[edit | edit source]
The Subscapularis muscle is one of the four muscles that comprise the rotator cuff, which stabilizes the shoulder joint. It is responsible for internal rotation and adduction of the humerus.
Clinical significance[edit | edit source]
Injury to the Subscapularis muscle can result in a loss of ability to internally rotate the shoulder and can cause pain and weakness. This muscle is often overlooked as a source of shoulder pain.
See also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD