Functional Anatomy – Infraspinatus

Infraspinatus is a flat rotator cuff muscle located in the infraspinous fossa of the scapula.

Origin: infraspinous fossa

Insertion: posterior greater tubercle of the humerus

Function: stabilize the humeral head, externally rotate the humerus

Innervation: C4-C6, Brachial Plexus, Suprascapular nerve

Wikipedia entry for Infraspinatus


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Tony Preston has a practice in Atlanta, Georgia where he sees clients. He has written and taught about anatomy, trigger points and cranial therapies since the mid-90s.

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