ADDUCTOR POLLICIS

Origin

Oblique head: base of 2nd and 3rd MCs, trapezoid and capitate. Transverse head: palmar border and shaft of 3rd MC

Action

Adducts CMC jnt of thumb

Insertion

Ulnar sesamoid then ulnar side of base of prox phalanx and tendon of extensor pollicis longus

Nerve

Deep br of ulnar N (T1)