Adductor pollicis

  • The adductor pollicis (or adductor pollicis muscle, latin: musculus adductor pollicis) is one of the four thenar muscles lying on the radial side of the palm.

    The adductor pollicis is a flat, triangular muscle, lying deep in the thenar compartment. The adductor pollicis arises with two heads: the oblique and the transverse head.

    Origin

    The oblique head of the adductor pollicis originates from the capitate bone, but the oblique head arises from the third metacarpal bone.

    Insertion

    The adductor pollicis inserts to the base of the proximal phalanx of the thumb.

    Action

    The adductor pollicis functions as an adductor of the thumb.

    Innervation

    The adductor pollicis is innervated by the ulnar nerve.