Adductor pollicis muscle
The adductor pollicis muscle originates from several points in the hand. The oblique head attaches at the base of the second and third metacarpals, the trapezoid bone and the capitate bone. The transverse head originates from the shaft of the third metacarpal bone.
The adductor pollicis muscle is innervated by the deep branch of the ulnar nerve (T1).
The adductor pollicis gets its name from its action: adductor refers to its action as an adductor, and pollicis means of the thumb.