Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Third metacarpal bone
open-in-new
<p>The third metacarpal bone (metacarpal bone of the <a href="/facts/Middle_finger/1Vzzd5hX">middle finger</a>) is a little smaller than the second. </p><p>The dorsal aspect of its base presents on its radial side a pyramidal eminence, the <a href="/facts/Third_metacarpal_styloid_process/WJDsIQJ4">styloid process</a>, which extends upward behind the <a href="/facts/Capitate/MQwwkR52">capitate</a>; immediately distal to this is a rough surface for the attachment of the <a href="/facts/Extensor_carpi_radialis_brevis_muscle/aI99tXan">extensor carpi radialis brevis muscle</a>. </p><p>The carpal articular facet is concave behind, flat in front, and articulates with the capitate. </p><p>On the radial side is a smooth, concave facet for articulation with the <a href="/facts/Second_metacarpal/qPjqdG77">second metacarpal</a>, and on the ulnar side two small oval facets for the <a href="/facts/Fourth_metacarpal/Jrg9vcLW">fourth metacarpal</a>. </p>