ulnohumeral

The term ulnohumeral refers to the articulation between the ulna and the humerus, two of the principal bones of the upper arm. This joint is a significant component of the elbow, a complex hinge joint that allows for flexion and extension of the forearm. Specifically, the ulnohumeral joint involves the trochlear notch of the ulna fitting snugly against the trochlea of the humerus. This articulation is stabilized by strong ligaments, particularly the ulnar collateral ligament, which prevents excessive outward movement of the forearm. The precise alignment and smooth movement of the ulnohumeral joint are crucial for the overall function of the elbow, enabling a wide range of activities from simple gestures to complex athletic movements. Injuries or conditions affecting this joint can significantly impair arm mobility and strength.