PPT 12 Flashcards
flexor digitorum superficialis (FDS) action
of digits 2-5…
proximal phalanx flexion @MCP joint
middle phalanx flexion @PIP joint
extrinsic flexor muscles
superficial:
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
intermediate:
flexor digitorum superficialis
deep:
flexor digitorum profundus
flexor pollicis longus
pronator quadratus
flexor digitorum superficialis (FDS) PA
humero-ulnar head: medial epicondyle, coronoid process of ulna
radial head: anterior radius
flexor digitorum superficialis (FDS) DA
shafts of middle phalanges of digits 2-5
flexor digitorum superficialis (FDS) nerve innervation
median nerve C7, C8, T1
flexor digitorum pronfundus (FDP) action
digits 2-5 flexion @ MCP, PIP, and DIP joints
assists with wrist flexion
flexor digitorum pronfundus (FDP) PA
proximal ulna
interosseous membrane
flexor digitorum pronfundus (FDP) DA
medial part: bases of distal phalanges of digits 4-5
lateral part: bases of distal phalanges of digits 2-3
flexor digitorum pronfundus (FDP) nerve innervation
medial part: ulnar nerve C8, T1
lateral part: median nerve (AIN) C8, T1
flexor pollicis longus action
flexes phalanges of thumb
flexor pollicis longus PA
anterior radius and adjacent interosseous membrane
flexor pollicis longus DA
base of distal phalanx of thumb
flexor pollicis longus nerve innervation
median nerve (AIN) C8, T1
thenar muscles
flexor pollicis brevis
abductor pollicis brevis
opponens pollicis
flexor pollicis brevis action
thumb flexion @ CMC and MCP joints
assists with thumb opposition
flexor pollicis brevis PA
flexor retinaculum
tubercules of scaphoid and trapezium
flexor pollicis brevis DA
base of proximal phalanx of thumb
flexor pollicis brevis nerve innervation
superficial head: median nerve (recurrent branch) C8, T1
deep head: ulna nerve (deep branch) C8, T1
abductor pollicis brevis action
thumb abduction @ CMC and MCP joints
assists with thumb opposition
abductor pollicis brevis PA
flexor retinaculum
tubercules of scaphoid and trapezium
abductor pollicis brevis DA
base of proximal phalanx of thumb
abductor pollicis brevis nerve innervation
median nerve (recurrent branch) C8, T1
opponens pollicis action
thumb opposition (draws 1st metacarpal to center of palm and medially rotates it)
opponens pollicis PA
flexor retinaculum
tubercules of scaphoid and trapezium
opponens pollicis DA
1st metacarpal
opponens pollicis nerve innervation
median nerve (recurrent branch) C8, T1
hypothenar muscles
flexor digiti minimi
abductor digiti minimi
opponens digiti minimi
flexor digiti minimi action
5th digit proximal phalanx flexion @ MCP joint
flexor digiti minimi PA
hook of hamate
flexor retinaculum
flexor digiti minimi DA
base of 5th proximal phalanx
flexor digiti minimi nerve innervation
ulnar nerve (deep branch) C8, T1
abductor digiti minimi action
5th digit abduction @MCP joint
abductor digiti minimi PA
pisiform
abductor digiti minimi DA
base of 5th proximal phalanx
abductor digiti minimi nerve innervation
ulnar nerve (deep branch) C8, T1
opponens digiti minimi action
5th digit opposition @CMC joint
opponens digiti minimi PA
hook of hamate
flexor retinaculum
opponens digiti minimi DA
medial border of 5th metacarpal
opponens digiti minimi nerve innervation
ulnar nerve (deep branch) C8, T1
adductor pollicis action
thumb adduction towards lateral border of palm
adductor pollicis PA
oblique head:
bases of 2nd and 3rd metacarpals
capitate
adjacent carpal bones
transverse head:
shaft of 3rd metacarpal
adductor pollicis DA
base of proximal phalanx of thumb
adductor pollicis nerve innervation
ulnar nerve (deep branch) C8, T1
lumbricals of the hand action
of digits 2-5…
flexion @MCP joints
extension @IP joints
lumbricals of the hand PA
1 & 2: lateral two tendons of FDP (unipennate)
3 & 4: medial three tendons of FDP (bipennate)
lumbricals of the hand DA
radial sides of extensor expansions of digits 2-5
lumbricals of the hand nerve innervation
1 & 2: median nerve (digital branch) C8, T1
3 & 4: ulnar nerve (deep branch) C8, T1
palmar interossei action
digits 2, 4, 5 adduction towards axial line
assists lumbricals with…
flexion @MCP joints
extension @IP joints
palmar interossei PA
palmar surfaces of 2nd, 4th, and 5th metacarpals (unipennate)
palmar interossei DA
of digits 2, 4, 5…
bases of proximal phalanges
extensor expansions
palmar interossei nerve innervation
ulnar nerve (deep branch) C8, T1
dorsal interossei action
digits 2-4 abduction from axial line
assists lumbricals with…
flexion @MCP joints
extension @IP joints
dorsal interossei PA
adjacent sides of two metacarpals (bipennate)
dorsal interossei DA
of digits 2-4…
bases of proximal phalanges
extensor expansions
dorsal interossei nerve innervation
ulnar nerve (deep branch) C8, T1
