What structure do most rotator cuff muscles insert onto?

The correct answer is that most rotator cuff muscles insert onto the greater tuberosity of the humerus. The rotator cuff is composed of four muscles: the supraspinatus, infraspinatus, teres minor, and subscapularis. Each of these muscles has a specific role in the stabilization and movement of the shoulder joint.

The supraspinatus inserts onto the superior aspect of the greater tuberosity, while the infraspinatus and teres minor insert onto the posterior aspect of the greater tuberosity. Subscapularis differs slightly as it inserts onto the lesser tuberosity, but it is not considered among the common insertions associated with the overall function of the rotator cuff as a group.

The greater tuberosity serves as a critical site for muscle attachment, contributing to the overall stability and mobility of the shoulder joint in various movements like abduction and rotation. This anatomical feature is essential in understanding how the rotator cuff functions and why injuries to these muscles can lead to significant shoulder dysfunction.

In contrast, the lesser tuberosity serves primarily for the subscapularis, the medial epicondyle is associated with the forearm's flexor muscles, and the