Question

what action does the anconeus muscle perform at the elbow?

a.) flexion
b.) pronation
c.) extension
d.) supination

Explanation:

Identify the function of the anconeus muscle

The anconeus is a small, triangular muscle located at the posterolateral aspect of the elbow joint, originating from the lateral epicondyle of the humerus and inserting onto the olecranon process of the ulna.

Determine the joint action

By contracting, the anconeus assists the triceps brachii in extending the forearm at the elbow joint and stabilizes the elbow during movement.

Match with the given options

The action performed is extension, which corresponds to option c.

Answer:

• a.) Flexion
• b.) Pronation
• c.) Extension (Correct answer)
• d.) Supination