humeroulnar articulation
humeroulnar joint

The humeroulnar joint (ulnohumeral or trochlear joint), is part of the elbow-joint.

Humeroulnar joint (elbow) - The biceps brachii also functions as an important flexor of the forearm, particularly when the forearm is supinated.

Flexion in the humeroulnar joint is produced by the action of the biceps brachii and brachialis, assisted by the brachioradialis, with a tiny contribution from the muscles arising from the medial epicondyle of the humerus.