Ch 13 (hand) muscles Flashcards
function to move thumb and forms ball of thumb
thenar muscles
flexor pollicis brevis, abductor pollicis brevis, oponens pollicis are
thenar muscles
located deep in palm of hand and perform more intricate motions
deep palm muscles
adductor pollicis, interossei, lumbricals are
deep palm muscles
act primarily on little finger
hypothenar muscles
flexor digiti minimi, abductor digiti minimi, and opponens digiti minimi are
hypothenar muscles
flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus are
anterior, extrinsic muscles
abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor digitorum, extensor indicis, and extensor digiti minimi are
posterior, extrinsic muscles
A: flexes mcp and cmc of thumb
flexor pollicis brevis
A: abducts cmc of thumb
abductor pollicis brevis
A- opposes cmc of thumb
opponens pollicis
A- adducts cmc of thumb
adductor pollicis
A- abduct fingers at MCP joint
dorsal interossei
A- adducts fingers at MCP joint
palmar interossei
A- flexes mcp joint, extends pip and dip
lumbricals
A- opposes cmc of 5th finger
opponens digiti minimi
A- flexes mcp and cmc of 5th finger
flexor digiti minimi
A- abducts mcp of 5th finger
abductor digiti minimi
O- distal ulna
extensor indicis
I- base of distal phalanx of 2nd finger
extensor indicis
A- extends all joints (mcp, pip, dip)
extensor indicis
extensor indicis is innervated at?
radial nerve (C6-8)
extensor digitorum originates?
lateral epicondyle of humerus
I- base of distal phalanx of 2nd-5th fingers
extensor digitorum
A- extends all joints of fingers (dip, pip, mcp)
extensor digitorum
extensor digitorum is innervated at?
radial nerve (C6-8)
extensor digiti minimi originates?
lateral epicondyle of humerus
I- base of distal phalanx of 5th finger
extensor digiti minimi
A- extends all joints of 5th finger (dip, pip, mcp)
extensor digiti minimi
extensor digiti minimi is innervated at?
radial
O- common flexor tendon on medial epicondyle, coronoid process, and radius
flexor digitorum superficialis
I- sides of middle phalanx of 4 fingers
flexor digitorum superficialis
A- flexes pip and mcp joint of fingers
flexor digitorum superficialis
flexor digitorum superficialis innervates at?
median nerve (c7-T1)
O- upper 3/4 of ulna
flexor digitorum profundus
I- distal phalanx of 4 fingers
flexor digitorum profundus
A- flexes all joins of fingers (dip, pip, mcp)
flexor digitorum profundus
N- median and ulnar nerve (C8, T1)
flexor digitorum profundus
O- radius, anterior surface
flexor pollicis longus
I- distal phalnax of thumb
flexor pollicis longus
A- flexes all three joints at thumb (ip, mcp, cmc)
flexor pollicis longus
flexor pollicis longus innervates at?
median (C8, T1)
O- posterior radius, interosseous membrande, middle ulna
abductor pollicis longus
I- base of 1st metacarpal
abductor pollicis longus
A- abducts thumb (CMC)
abductor pollicis longus
abductor pollicis longus innervates at?
radial C6-7
O- posterior distal radius
extensor pollicis brevis
I- base of proximal phalanx of thumb
extensor pollicis brevis
A- extends mcp and cmc of thumb
extensor pollicis brevis
extensor pollicis brevis innervates at?
radial (C6-7)
O- middle posterior ulna, interosseous membrane
extensor pollicis longus
I- base of distal phalanx of thumb
extensor pollicis longus
A- extends all joints of thumb (IP, CMC, MCP)
extensor pollicis longus
extensor pollicis longus innervates at?
radial (C6-8)