ADDUCTOR POLLICIS

ORIGIN
Oblique head: base of 2nd and 3rd metacarpals, trapezoid and capitate. Transverse head: palmar border and shaft of 3rd metacarpal
INSERTION
Ulnar sesamoid then ulnar side of base of proximal phalanx and tendon of extensor pollicis longus
ACTION
Adducts carpometacarpal joint of thumb
NERVE
Deep branch of ulnar nerve (T1)