Monday, 3 November 2008

Muscle a day #1: Adductor Pollicis

As a way of revising muscles, I'm going to add a post here every day, or however often I can, to highlight a particular muscle relevant to my studies. The first on which came to the fore yesterday whilst working on the hand is...

Adductor Pollicis
This muscle is found on the palmar aspect of the hand and adducts the thumb. It has two heads: transverse and oblique.

Attachments
Oblique head: slips from capitate, bases or 2nd and 3rd metacarpals, intercarpal ligaments and sheath of tenson of flexor carpi radialis.

Transverse head: lower 2/3 of plamar 3rd metacarpal

Insertion: ulnar side of the base of the proximal phalanx of the thumb

Innervation
Deep branch of ulnar nerve

Notes:
The radial artery passes between the two heads, travelling from the back of the hand into the palm, where it forms the deep palmar arch

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