| 词条 | Third metacarpal bone | ||||
| 释义 |
|Name = Third metacarpal bone |Latin = Os metacarpale III |Image = Third metacarpal bone (left hand) 01 palmar view.png |Caption = Third metacarpal of the left hand (shown in red). Palmar view. |Image2 = Gray231.png |Caption2 = The left third metacarpal. |Origins = |Insertions = |Articulations = }} 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. OssificationThe ossification process begins in the shaft during prenatal life, and in the head between 11th and 27th months.[1] Additional imagesSee also
References{{Gray's}}1. ^{{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}} {{Commons category|Third metacarpal bone}}{{Bones of upper extremity}}{{musculoskeletal-stub}}{{Portal bar|Anatomy}} 3 : Skeletal system|Bones of the hand|Metacarpus |
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