Third metacarpal bone: Difference between revisions

Revision as of 05:11, 4 January 2014

Revision as of 09:12, 5 January 2014

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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 [[Third metacarpal styloid process|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.<ref name=Ajay>{{cite journal|last=Balachandran|first=Ajay|author2=Anooj Krishna|author3= Moumitha Kartha|author4= Libu G. K.|author5= Liza John|author6= Krishnan B|title=A Study of Ossification of heads of 2nd to 5th Metacarpals in Forensic Age Estimation in the Kerala Population|journal=Journal of Evolution of Medical and Dental Sciences|date=30 December 2013|volume=2|issue=52|pages=10165–10171|url=http://www.jemds.com/data_pdf/dr%20ajay%20balachandran.pdf|accessdate=26 December 2013}}</ref>.

== Additional images ==

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{{Gray's}}

{{CommonscatCommons category|Third metacarpal bone}}

{{Bones of upper extremity}}

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[[Category:Bones of the hand]]

[[Category:Metacarpus]]

{{musculoskeletal-stub}}