Fourth metacarpal bone
| Fourth metacarpal bone | |
|---|---|
_01_palmar_view.png?lang=en) Fourth metacarpal of the left hand (shown in red). Palmar view. | |
 The fourth metacarpal. (Left.) | |
| Details | |
| Identifiers | |
| Latin | os metacarpale IV |
| FMA | 23902 |
| Anatomical terms of bone | |
The fourth metacarpal bone (metacarpal bone of the ring finger) is shorter and smaller than the third.
The base is small and quadrilateral; its superior surface presents two facets, a large one medially for articulation with the hamate, and a small one laterally for the capitate.
On the radial side are two oval facets, for articulation with the third metacarpal; and on the ulnar side a single concave facet, for the fifth metacarpal.
Clinical relevance
A shortend fourth metacarspal bone can be a symptom of Kallmann syndrome, a genetic condition which results in the failure to commence or the non-completion of puberty. A short fourth metacarpal bone can also be found in Turner syndrome, a disorder involving sex chromosomes.
Additional images
-
Fourth metacarpal bone of the left hand (shown in red). Animation. -
Fourth metacarpal bone of the left hand. Close up. -
Palmer view of the left hand (fourth metacarpal shown in yellow). -
Dorsal view of the left hand (fourth metacarpal shown in yellow). -
A fractured right hand fourth metacarpal (boxer's fracture).
_-_animation01.gif?lang=en)
_-_animation02.gif?lang=en)
See also
References
This article incorporates text in the public domain from page 228 of the 20th edition of Gray's Anatomy (1918)
