What is the distal attachment point of the infraspinatus muscle?

The infraspinatus muscle is one of the rotator cuff muscles, and its primary function is to facilitate external rotation of the arm at the shoulder joint. The distal attachment point of the infraspinatus is the greater tubercle of the humerus. This anatomical feature is crucial for the muscle's function as it allows for effective exertion of force during shoulder movements.

The greater tubercle of the humerus provides an appropriate surface area for the muscle fibers of the infraspinatus, enabling them to generate the necessary torque for external rotation of the shoulder. This attachment plays a vital role in stabilizing the glenohumeral joint in combination with the other rotator cuff muscles.

Understanding the attachment points of muscles is fundamental when studying their functions and the implications of potential injuries or conditions that can affect movement. In contrast, other choices such as the lesser tubercle, deltoid tuberosity, and olecranon process do not serve as the distal attachment for the infraspinatus, highlighting the importance of precise anatomical knowledge in musculoskeletal assessments and interventions.