MOINA Hand

palmaris brevis origin

flexor retinaculum, palmar aponeurosis

palmaris brevis insertion

skin of palm

palmaris brevis innervation

superficial branch of ulnar nerve

palmaris brevis action

corrugates skin to improve grip of palm

lumbricals origin

tendons of flexor digitorum profundus

lumbricals insertion

extensor expansion of medial four fingers

lumbricals 1 & 2 innervation

median nerve

lumbricals 3 & 4 innervation

ulnar nerve

lumbricals action

flex metacarpophalangeal joints & extend interphalangeal joints of fingers except thumb

palmar interossei origin

anterior surface of shafts of 2nd, 4th, and 5th metacarpals

palmar interossei insertion

proximal phalanges of thumb and index, ring, and little fingers and dorsal expansion of each finger

palmar interossei innervation

deep branch of ulnar nerve

palmar interossei action

adduct fingers toward center of third finger, flex MCPJ, extend IPJ

abductor pollicis brevis origin

scaphoid, trapezium, flexor retinaculum

abductor pollicis brevis insertion

base of proximal phalanx of thumb

abductor pollicis brevis innervation

median nerve

abductor pollicis brevis action

abducts thumb

flexor pollicis brevis origin

scaphoid, trapezium, flexor retinaculum

flexor pollicis brevis insertion

base of proximal phalanx of thumb

flexor pollicis brevis innervation

superficial head; median nerve
deep head; median and ulnar nerve

flexor pollicis brevis action

flexes metacarpophalangeal joint of thumb

opponens pollicis origin

scaphoid, trapezium, flexor retinaculum

opponens pollicis insertion

shaft of metacarpal bone of thumb

opponens pollicis innervation

median nerve

opponens pollicis action

pulls thumb medially and forward across palm

adductor pollicis origin (oblique head)

2nd and 3rd metacarpal bones

adductor pollicis origin (transverse head)

3rd metacarpal bone

adductor pollicis insertion

base of proximal phalanx of thumb

adductor pollicis innervation

deep branch of ulnar nerve

adductor pollicis action

adducts thumb

abductor digiti minimi origin

pisiform

abductor digiti minimi insertion

base of proximal phalanx of little finger

abductor digiti minimi innervation

deep branch of ulnar nerve

abductor digiti minimi action

abducts little finger

flexor digiti minimi origin

flexor retinaculum

flexor digiti minimi insertion

base of proximal phalanx of little finger

flexor digiti minimi innervation

deep branch of ulnar nerve

flexor digiti minimi action

flexes little finger

opponens digiti minimi origin

flexor retinaculum

opponens digiti minimi insertion

medial border of 5th metacarpal

opponens digiti minimi innervation

deep branch of ulnar nerve

opponens digiti minimi action

pulls fifth metacarpal forward as in cupping the palm

dorsal interossei origin

contiguous sides of shafts of metacarpal bones

dorsal interossei insertion

proximal phalanges of fingers and dorsal extensor expansion

dorsal interossei innervation

deep branch of ulnar nerve

dorsal interossei action

abduct fingers from center of third finger, flex MCPJ, extend IPJ