Which region of the humerus articulates with the radius as...

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Key Concepts

Elbow Joint Anatomy

The elbow joint is a complex hinge joint formed by articulations between three bones: the humerus, the radius, and the ulna. It includes multiple articulation surfaces that allow for elbow flexion, extension, and a degree of rotation, making it essential for the proper functioning of the upper limb.

Humerus Anatomy

The humerus is the long bone of the upper arm and features distinct regions that contribute to its articulation with neighboring bones. Its distal end, which interacts with both the radius and ulna, is particularly important in forming the elbow joint, as it contains multiple articular surfaces that facilitate movement.

Capitulum

The capitulum is a rounded, knob-like structure located on the lateral surface of the distal humerus. It specifically articulates with the head of the radius, allowing for the primary movement and load-bearing function in the lateral aspect of the elbow joint. Its unique morphology is critical for transmitting forces during forearm motions.

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