Capitate
Capitate is one of the seven carpal bones of the wrist. It is shaped like a head with its rounded extremity and is the largest bone in the wrist. It is located centrally in the distal row of the carpal bones.
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Capitate
ARTICULATIONS
The capitate articulates primarily with the 3rd metacarpal (bone of the palm) distally, though it variably articulates with other metacarpals as well. As for its articulation with other wrist bones, its proximal surface articulates with the lunate and lateral (radial side) surface with the scaphoid. In the distal row of the carpal bones it articulates with trapezoid laterally and hamate medially (ulnar side).
SURFACES
It has superior, inferior, palmar, dorsal, medial and lateral surfaces. The palmar, lateral and medial surfaces are rough for the attachments of ligaments and muscles; a part of adductor pollicis muscle on palmar surface, and interosseous ligaments on lateral and medial surfaces. Rest of the surfaces are mostly smooth for articulation with the neighboring bones.
FUNCTION
Its main function is to provide structural support to the rest of the wrist bones and stabilize them. It also serves as attachment site for ligaments and muscles.
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