Third metacarpal bone
Third metacarpal bone | |
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File:Third metacarpal bone (left hand) 01 palmar view.png
Third metacarpal of the left hand (shown in red). Palmar view.
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File:Gray231.png
The left third metacarpal.
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Details | |
Latin | Os metacarpale III |
Identifiers | |
MeSH | A02.835.232.087.319.550 |
TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
TH | {{#property:P1694}} |
TE | {{#property:P1693}} |
FMA | 23901 |
Anatomical terms of bone
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
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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.
Ossification
The ossification process begins in the shaft during prenatal life, and in the head between 11th and 27th months.[1]
Additional images
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Third metacarpal bone (left hand) - animation01.gif
Third metacarpal bone of the left hand (shown in red). Animation.
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Third metacarpal bone (left hand) - animation02.gif
Third metacarpal bone of the left hand. Close up.
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Gray219 - Third metacarpal bone.png
Palmer view of the left hand (third metacarpal shown in yellow).
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Gray220 - Third metacarpal bone.png
Dorsal view of the left hand (third metacarpal shown in yellow).
See also
- Metacarpus
- First metacarpal bone
- Second metacarpal bone
- Fourth metacarpal bone
- Fifth metacarpal bone
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
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