Where does the serratus anterior muscle insert?

The serratus anterior muscle primarily inserts on the medial border of the scapula. This muscle plays a crucial role in the movement and stabilization of the scapula during arm elevation and overhead activities. Proper functioning of the serratus anterior is essential for shoulder mechanics, as it helps to protract the scapula and keep it stable against the thoracic wall.

Choosing the anterior scapula as the insertion point reflects a misunderstanding of the specific anatomical location. The muscle actually wraps around the ribcage and attaches along the entire medial border of the scapula, not at the anterior portion of the scapula itself. Additionally, the greater tubercle of the humerus, coracoid process, and anterior scapula are not the correct anatomical sites for the serratus anterior’s insertion, highlighting that a clear understanding of shoulder anatomy is essential for accurately identifying muscle insertions.