Third metacarpal bone

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Third metacarpal bone
Third metacarpal of the left hand (shown in red). Palmar view.
The left third metacarpal.
Latin Os metacarpale III
Gray's p.228
MeSH Metacarpal+Bones
FMA FMA:23901

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

  • Third metacarpal bone of the left hand (shown in red). Animation.

  • Third metacarpal bone of the left hand. Close up.

  • Palmer view of the left hand (third metacarpal shown in yellow).

  • Dorsal view of the left hand (third metacarpal shown in yellow).

See also

References

  1. ↑ Balachandran, Ajay; Anooj Krishna; Moumitha Kartha; Libu G. K.; Liza John; Krishnan B (30 December 2013). "A Study of Ossification of heads of 2nd to 5th Metacarpals in Forensic Age Estimation in the Kerala Population". Journal of Evolution of Medical and Dental Sciences 2 (52): 10165–10171. Retrieved 26 December 2013. 

This article incorporates text from a public domain edition of Gray's Anatomy.

Wikimedia Commons has media related to Third metacarpal bone.
Bones of upper limbs (TA A02.4, GA 2.200–230)
Pectoral girdle, clavicle
Scapula
Humerus
Forearm
Hand

M: BON/CAR

anat (c/f/k/f, u, t/p, l)/phys/devp/cell

noco/cong/tumr, sysi/epon, injr

proc, drug (M5)


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