GROSS ANATOMY

Detailed explanation-1: -In human anatomy of the arm, the capitulum of the humerus is a smooth, rounded eminence on the lateral portion of the distal articular surface of the humerus. It articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone.

Detailed explanation-2: -The ball shape of the capitulum and the nail-head-looking radial head comprise a nicely designed pivot joint; the head of the radius rotates on the ball of the capitulum.

Detailed explanation-3: -Capitulum (Capitulum humeri) is a small, knob-like prominence on the distolateral end of the humerus. It articulates with the head of the radius bone at the elbow joint.

Detailed explanation-4: -The capitellum is a rounded protuberance on the end of the humerus or upper arm bone. Capitellum fractures are rare injuries of the elbow, usually seen in adolescents, caused by direct trauma or a fall on to the outstretched hand.

Detailed explanation-5: -Immediately lateral to the trochlea is the capitulum (“small head”), a knob-like structure located on the anterior surface of the distal humerus. The capitulum articulates with the radius bone of the forearm.