hand muscles Flashcards
abductor pollicis brevis
o:flexor retinaculum and trapizum and scaphoid
I:base of thumb
action: abducts CMC and MCP of thumb
n: median
(extra) flexor pollicis brevis (2 origins superficial and deep) and (2 nerve)
superficial: trapezium and flexor retinaculum
deep: trapezoid and captitate
I: base of of thumb
a: flexes thumb and CMC joints
N: median - superficial
ulnar - deep
oppenens pollicis
o:flexor retinaculum and trapezium
I: entire length of radial side of 1st MC
a: opposes thumb
n: median
adductor pollicis - extra
O: oblique fibers: capitate and base of 2 and 3 metacarpals
transverse fibers: palmar 3rd metacarpal
I: oblique: extensor expansion
transverse: base of proximal phalanx of thumb
a: adducts CMC and MCP and flexes MCP
n: ulnar
abductor digiti minimi
o: tendon of fcu and pisiform
I: base of pinky and extensor expansion
a: abducts pinky MCP joint
n: ulnar
flexor digiti minimi
o: hamate and flexor retinaculum
i: base of proxmial phalanx of pinky
a: flexes pinky
n: ulnar
opponens digiti minimi
o: hamate and flexor retinaculum
i: entire length of 5th metacarpal
a: opposes pinky
n: ulnar
lumbricals
o: 1 and 2 - flexor profundus tendons of 2nd and 3rd phalanx
3: sides of FPL muscles of 3rd and 4th phalanx
4: FPT of 4th and 5th tendon
o: extensor expansion
a: extend IP joints and flex MCP joints
n: median and ulnar
dorsal interossei
o: metacarpals
i: extensor expansion and base of proximal phalanx
a: abducts 2-5 digits
n: ulnar
