Muscles that Move the Pollex

extensor pollicis longus origin

Posterior surface of middle 1/3 of ulna and interosseous membrane (EPL)

extensor pollicis longus insertion

base of distal phalanx of thumb (EPL)

flexor pollicis longus insertion

base of distal phalanx of thumb (FPL)

adductor pollicis origin

capitate, 2nd and 3rd metacarpals (AP)

flexor pollicis brevis action

flexes thumb (FPB)

flexor pollicis longus action

flexes thumb (FPL)

opponens pollicis insertion

lateral side of first metacarpal (OP)

extensor pollicis brevis origin

posterior surface of middle third of radius (EPL)

adductor pollicis innervation

ulnar nerve (AP)

Flexor Pollicis longus origin

Anterior surface of radius and adjacent interosseous membrane (FPL)

Thenar muscles

abductor pollicis brevis, flexor pollicis brevis, opponens pollicis

abductor pollicis longus action

abducts thumb (APL)

abductor brevis action

abducts thumbs (AB)

adductor pollicis action

adducts thumb (AP)

abductor pollicis brevis insertion

base of proximal phalanx of thumb (APB)

extensor pollicis brevis insertion

base of proximal phalanx of thumb (EPB)

flexor pollicis brevis insertion

base of proximal phalanx of thumb (FPB)

extensor pollicis brevis action

extends proximal phalanx of thumb and abducts hand (EPB)

flexor pollicis brevis origin

flexor retinaculum and trapezium (FPB)

opponens pollicis origin

flexor retinaculum and trapezium (OP)

Abductor pollicis brevis origin

flexor retinaculum, scaphoid, trapezium (APB)

abductor pollicis longus insertion

lateral surface of base of first metacarpal (APL)

adductor pollicis insertion

medial side of base of proximal phalanx of thumb (AP)

abductor brevis innervation

median nerve (AB)

flexor pollicis brevis innervation

median nerve (FPB)

flexor pollicis longus innervation

median nerve (FPL)

opponens pollicis innervation

median nerve (OP)

abductor pollicis longus origin

middle third of posterior surfaces of radius and ulna (APL)

opponens pollicis action

opposes thumb (OP)

abductor pollicis longus innervation

radial nerve (APL)

extensor pollicis brevis innervation

radial nerve (EPB)

extensor pollicis longus innervation

radial nerve (EPL)