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)