adductor muscle of thumb


A muscle with origin from the transverse head from the shaft of the third metacarpal bone and from the oblique head from the front of the base of the second metacarpal, trapezoid, and capitate bones; with insertion to the medial side of the base of the proximal phalanx of the thumb, with nerve supply from the ulnar nerve, and whose action adducts the thumb.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.