What is the insertion point of the supraspinatus muscle?

The supraspinatus muscle's insertion point is at the greater tubercle of the humerus. This location is significant because it is one of the four rotator cuff muscles that help stabilize and facilitate movement in the shoulder joint. The supraspinatus plays a crucial role in initiating arm abduction, which is the movement of raising the arm away from the body. By inserting at the greater tubercle, the supraspinatus effectively positions itself to contribute to the shoulder's range of motion and provides essential support to the mechanics of shoulder movements.

The other options refer to anatomical features that are unrelated to the supraspinatus. The olecranon process is part of the ulna and plays a role in elbow movement, while the distal humerus is involved at the elbow joint but is not associated with the supraspinatus. Similarly, the ulna does not have any connection to the insertion of the supraspinatus, underscoring the importance of identifying the specific points of muscular attachment and their relevance to movement and function.