What is the proximal attachment of the supraspinatus muscle?

The proximal attachment of the supraspinatus muscle is found at the supraspinous fossa of the scapula. This anatomical feature is located above the spine of the scapula and serves as the origin point for the supraspinatus muscle. This muscle plays a crucial role in shoulder function, particularly in initiating the abduction of the arm. Its attachment to the supraspinous fossa allows it to stabilize the shoulder joint and assist with movements of the arm, especially the first 15 degrees of abduction, before the deltoid muscle takes over.

Understanding this attachment helps in appreciating the muscle's function in the shoulder girdle as well as its contribution to overall arm mobility and stability.