Hand Muscles Flashcards
Abductor Pollicis Brevis
PA: trapezium and flexor retinaculum
DA: proximal phalanx of thumb
N: median nerve c8- T1
A: abducts thumb
Flexor Pollicis Brevis
PA: trapezium and flexor retinaculum
DA: proximal phalanx of thumb
N: superficial- median C8-T1, deep- ulnar
A: flexes proximal phalanx of thumb
Opponens Pollicis
PA: trapezium and flexor retinaculum
DA: 1st MC
N: median nerve c8-T1
A: opposes thumb toward center of hand and rotates it medially
adductor pollicis
PA: shaft of 3rd MC and capitate
DA: proximal phalanx of thumb
N: ulnar c8-T1
A: adducts thumb to middle digit
Abductor digiti minimi
PA: pisiform
DA: proximal phalanx of 5th digit
N: ulnar c8-T1
A: abducts 5th digit
flexor digiti minimi brevis
PA: hook of hamate and flexor retinaculum
DA: proximal phalanx of 5th digit
N: ulnar c8-T1
A: flexes proximal phalanx of 5th digit
opponens digiti minimi
PA: hook of hamate and flexor retinaculum
DA: 5th MC
N: ulnar c8-T1
A: draws 5th MC anteriorly and rotates, in opposition with thumb
Lumbricals digits 2-3
PA: lateral 2 FDP tendons
DA: extensor expansion
N: median c8-T1
A: flexes digits at MCP and extends IP joints
Lumbricals 4-5
PA: medial 2 FDP tendons
DA: extensor expansion
N: ulnar c8-T1
A: flexes digits at MCP and extends IP joints
Palmar interossei
PA: shaft of metacarpals 2,4,5
DA: extensor expansion of 2,4,5
N: ulnar c8-T1
A: adducts digits, flexes digits at MCP and extends IP joints
Dorsal Interossei
PA: adjacent sides of two MC
DA: extensor expansion of 2,3,4 digits
N: ulnar c8-T1
A: abduct digits, flexes digits at MCP and extends IP joints
What muscles are thenar?
abductor pollicis brevis, opponens pollicis, flexor pollicis brevis
What muscles are hypothenar?
Abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi
