What is the distal attachment point of the anconeus?

The anconeus muscle has its distal attachment at the olecranon and the proximal posterior surface of the ulna. This positioning plays a crucial role in its function as it assists in extending the elbow joint. The attachment to the olecranon, which is the bony prominence of the ulna at the elbow, allows the anconeus to stabilize the elbow during forearm movements, making it an important muscle for activities that require precision and strength in elbow extension. Its location helps to provide leverage during these movements, further emphasizing its significance in elbow mechanics.

In contrast, other options do not represent the correct anatomical path of the anconeus muscle. For instance, the coronoid process of the ulna is a different site that is not related to the anconeus's attachment. The infraglenoid tubercle of the scapula is the origin point for the long head of the triceps brachii and is not linked to the anconeus. Lastly, the lateral epicondyle of the humerus serves as an origin for other muscles in the forearm but does not connect to the anconeus. Each of these structures has distinct relationships with different muscles and movements in the upper extremity.