flexor pollicis brevis muscle

(redirected from Flexor pollicus brevis)
Also found in: Wikipedia.

flex·or pol·li·cis bre·vis mus·cle

(fleks'ŏr pol'li-sis brē'vis mŭs'ĕl)
Origin, superficial portion from flexor retinaculum of wrist, deep portion from ulnar side of first metacarpal bone; insertion, base of proximal phalanx of thumb; action, flexes proximal phalanx of thumb; nerve supply, median (superficial head) and deep branch of ulnar (deep head). Some authors consider the deep head to be the first in a series of four palmar interossei muscles of the hand.
Synonym(s): short flexor muscle of thumb.

flexor pollicis brevis muscle

A muscle of the hand originating on the flexor retinaculum and trapezium, trapezoid, and capitate and inserted on the lateral side of the base of the first phalanx of the thumb. It flexes the thumb at both the carpometacarpal joint and the metacarpophalangeal joint and is controlled by the median and the ulnar nerves.
See also: muscle