Tags: Anatomical Structure, Bone.
The third metacarpal bone (metacarpal bone of the middle finger) is a little smaller than the second.The dorsal aspect of its base presents on its radial side a pyramidal eminence the styloid process which extends upward behind the capitate; immediately distal to this is a rough surface for the attachment of the extensor carpi radialis brevis muscle.The carpal articular facet is concave behind flat in front and articulates with the capitate.On the radial side is a smooth concave facet for articulation with the second metacarpal and on the ulnar side two small oval facets for the fourth metacarpal.
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