test 2 hand muscles Flashcards
opponens pollicis proximal attachment origin
flexor retinaculum and tubercles of scaphoid and trapezium
thenar muscles of intrinsic hand
- opponens pollicis
- abductor pollicis brevis
- flexor pollicis brevis:superficial and deep heads
- adductor pollicis: oblique and transverse heads
opponens pollicis distal attachment insertion
latteral side of first meta carpal
opponens pollicis innervation
recurrent branch of median nerve C8 T1
opponens pollicis action
to oppose thumb, it draws 1st meta carpal medially to center of palm and rotates it medially
abductor pollicis brevis proximal attachment origin
flexor retinaculum and tubercles of scaphoid and trapezium
abductor pollicis brevis distal attachment insertion
lateral side of base of proximal phalanx of thumb
abductor pollicis brevis inervation
recurrent branch of median nerve C8 T1
abductor pollicis brevis action
- abducts thumb
- helps oppose it
flexor pollicis brevis:
superficial head
deep head
proximal attachment origin
flexor retinaculum and tubercles of scaphoid and trapezium
flexor pollicis brevis:
superficial head
deep head
distal attachment insertion
lateral side of base of proximal phalanx of thumb
flexor pollicis brevis:
superficial head
deep head
innervation
recurrent branch of median nerve C8 T1
flexor pollicis brevis:
superficial head
deep head
action
flexes thumb
adductor pollicis : oblique head proximal attachment origin
- base of 2nd and 3rd metacarpals
- capitate adjacent to carpals
adductor pollicis : oblique head distal attachment insertion
medial side of base of proximal phalanx of thumb
adductor pollicis : oblique head innervation
deep branch of ulnar nerve C8 T1
adductor pollicis : oblique head action
adducts thumb toward lateral border of palm
adductor pollicis : transverse head proximal attachment origin
anterior surface of shaft of rd meta carpal
adductor pollicis : transverse head distal attachment insertion
medial side of base of proximal phalanx of thumb
adductor pollicis : transverse innervation
deep branch of ulmar nerve C8 T1
adductor pollicis : transverse action
adducts thumb toward lateral border of palm
hypothenar muscles of hand
- abductor digiti minimi
- flexor digiti minimi brevis
- opponens digiti minimi
abductor digiti minimi proximal attachment origin
pisiform
abductor digiti minimi istal attachment insertion
medial side of base of proximal phalanx of 5th finger
abductor digiti minimi innervation
deep branch of ulnar nerve C8 T1
abductor digiti minimi action
- abducts 5th finger
- assists in flexion of its proximal phalanx
flexor digiti minimi brevis proximal attachment origin
hook of hamate and flexor retinaculum
flexor digiti minimi brevis distal attachment insetion
medial side of base of proximal phalanx of 5th finger
flexor digiti minimi brevis innervation
deep branch of ulnar nerve C8 T1
flexor digiti minimi brevis action
flexes proximal phalanx of 5th finger
opponens digiti minimi proximal attachment origin
hook of hamate and flexor retinaculum
opponens digiti minimi distal attachment insertion
medial border of 5th metacarpal
opponens digiti minimi innervtion
deep branch of ulnar nerve C8 T1
opponens digiti minimi action
-draws 5th metacarpal anterior and rotates it, brings 5th finger into opposition with thumb
short muscles of hand
- lumbrical 1,2,3,4
- dorsal interossei 1-4
- palmar interossei 1-3
lumbricals 1 and 2 proximal attachment origin
latteral two tendons of flexor digitorum profundus (as unipennate muscles)
lumbricals 1 and 2 distal attachment insertion
lateral sides of extensor expansions of 2nd - 5th fingers
lumbricals 1 and 2 innervation
median nerve C8 T1
lumbricals 1 and 2 action
- flex metacarpophalangeal joints
- extend interphalangeal joints of 2nd - 5th fingers
lumbricals 3 and 4 proximal attachment origin
medial three tendons of flexor digitorum profundus (as bipennate muscles)
lumbricals 3 and 4 distal ttachment insertion
lateral sides of extensor expansions of 2nd -5th fingers
lumbricals 3 and 4 innervation
deep branch of ulnar nerve C8 T1
lumbricals 3 and 4 action
- flex metacarpophalangeal joints
- extend interphalangeal joints of 2nd - 5th fingers
dorsal interossei 1-4 proximal attachment origin
adjacent sides of two metacarpals (as bipennate muscles)
dorsal interossei 1-4 distal attachment insertion
- base of proximal phalanges
- extensor expansions of 2nd -4th fingers
dorsal interossei 1-4 innervation
deep branch of ulnar nerve C8 T1
dorsal interossei 1-4 action
- abduct 2nd -4th fingers from axial line
- act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints
palmar interossei 1-3 proximal attachment origin
palmar surfaces of 2nd 4th and 5th metacarpals (as unipennate muscles)
palmar interossei 1-3 distal attachment insertion
- bases of proximal phalanges
- extensor expansions of 2nd 4th and 5th fingers
palmar interossei 1-3 innervation
deep branch of ulnar nerve C8 T1
palmar interossei 1-3 action
- adduct 2nd 4th and 5th fingers towards axial line
- assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints