Which nerve controlles adductor pollicis in the hand ?

The adductor pollicis muscle has two heads both on the
palmar side of the hand. The transverse head has its origin at the volar crest of the
third metacarpal of the hand. The oblique head is attached to the ligaments of the
capitate bone at the base of the second or third metacarpal. These heads join into an
insertion on the ulnar side of the proximal phalanx of the thumb. Its motions have to do
with the adduction of the thumb.

The adductor pollicis gets
its innervation from the ulnar nerve, which has its origin at the eighth cervical
vertebra. The functioning of the innervation of the adductor pollici is tested by
looking for Froment's sign. In order to perform this test, the patient is asked to hold
a piece of paper in a pinch grip between the thumb and forefinger. The test is to try to
pull the paper out. In a normal hand there should be reasonable resistance, whereas in
palsy of the adductor fromis the paper will pull out very
easily.