Introduction The muscles of the hand can be divided into extrinsic and intrinsic muscles extrinsic hand muscles these are muscles that are located outside of the hand (thus extrinsic) login to view 3 more bullets intrinsic hand muscles these are muscles that are located inside the hand (thus intrinsic) login to view 5 more bullets Thenar Muscles Introduction the thenar muscles form the thenar eminence on the lateral surface of the palm the thenar hand muscles include Opponens pollicis Abductor pollicis brevis Flexor pollicis brevis mnemonic: "OAF" these muscles are innervated by the median nerve and are involved in fine movements of the thumb Function the thenar hand muscles are involved in Opposition Abduction Flexion mnemonic: "OAF" Hypothenar Muscles Introduction the hypothenar muscles form the hypothenar eminence on the medial surface of the palm the hypothenar muscles include Opponens digiti minimi Abductor digiti minimi Flexor digiti minimi mnemonic: "OAF" these muscles are innervated by the ulnar nerve Function the hypothenar muscles are involved in Opposition Abduction Flexion mnemonic: "OAF" Interossei and Lumbricals Introduction interossei can be divided into dorsal and palmar interossei function login to view 7 more bullets innervation login to view 1 more bullet lumbricals there are 4 lumbrical muscles of the hand login to view 3 more bullets function login to view 2 more bullets innervation login to view 2 more bullets