Infraspinatus muscle
In human anatomy, the infraspinatus muscle is a thick triangular muscle, which occupies the chief part of the infraspinatous fossa. As one of the four muscles of the rotator cuff, the main function of the infraspinatus is to externally rotate the humerus and stabilize the shoulder joint.
| Infraspinatus muscle | |
|---|---|
Muscles connecting the upper extremity to the vertebral column (posterior view). | |
Infraspinatus muscle (shown in red) seen from behind. | |
| Details | |
| Origin | infraspinous fossa of the scapula |
| Insertion | middle facet of greater tubercle of the humerus |
| Artery | suprascapular and circumflex scapular arteries |
| Nerve | suprascapular nerve |
| Actions | External rotation of arm and stabilization of glenohumeral joint |
| Identifiers | |
| Latin | musculus infraspinatus |
| TA98 | A04.6.02.008 |
| TA2 | 2458 |
| FMA | 32546 |
| Anatomical terms of muscle | |
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