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ANA126 > hand muscles > Flashcards

hand muscles Flashcards

1
Q

what muscles are in the thenar group

A

flexor pollicis brevis
abductor pollicis brevis
opponens pollicis

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2
Q

thenar group origin

A

o - flexor retinaculum, scaphoid, trapezium

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3
Q

flexor pollicis brevis origin and insertion

A

o - flexor retinaculum, scaphoid, trapezium
i - medial proximal phalanx 1

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4
Q

flexor pollicis brevis action

A

flex thumb at CMC and MCP

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5
Q

abductor pollicis brevis origin and insertion

A

o - flexor retinaculum, scaphoid, trapezuim
i - lateral proximal phalanx 1

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6
Q

abductor pollicis brevis action

A

abduct thumb at CMC

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7
Q

opponens pollicis origin and insertion

A

o - flexor retinaculum, scaphoid, trapezium
i - lateral aspect 1st metacarpal

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8
Q

opponens pollicis action

A

opposes thumb at CMC joint

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9
Q

adductor pollicis origin and insertion

A

o - oblique head - base of 2nd and 3rd metacarpal
transverse head - anterior surface of 3rd metacarpal
i - medial base of 1st proximal phalanx

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10
Q

adductor pollicis action

A

adduct thumb at CMC

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11
Q

hypothenar group muscles

A

flexor digiti minimi brevis
abductor digiti minimi brevis
opponens digiti minimi

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12
Q

flexor digiti minimi brevis origin and insertion

A

o - hamate (hook) and flexor retinaculum
i - base of 5th proximal phalanx

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13
Q

flexor digiti minimi brevis action

A

flex digit 5 at MCP joint

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14
Q

abductor digiti minimi brevis origin and insertion

A

o - pisiform
i - meidal 5th proximal phalanx

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15
Q

abductor digiti minimi brevis action

A

abduct digit 5 at MCP

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16
Q

opponens digiti minmi origin and insertion

A

o - hamate and flexor retinaculum
i - medial 5th metacarpal

17
Q

opponens digiti minimi action

A

opposes digit 5 at CMC joint

18
Q

lumbricals origin and insertion

A

o - tendons of flexor digitorum profundus digits 2-5
i - extensor expansion digits 2-5

19
Q

lumbricals action

A

flex MCP and extend PIP and DIP digits 2-5

20
Q

dorsal interossei origin and insertion

A

o - adjacent metacarpals
i - bases of proximal phalanges and extensor expansion digits 2-4

21
Q

dorsal interossei action

A

abduct digits 2-4 at MCP

22
Q

palmar interossei origin and insertion

A

o - 2nd, 4th, 5th metacarpals
i - bases of proximal phalanges and extensor expansion digits 2, 4, 5

23
Q

palmar interossei action

A

adduct digits 2, 4, 5 at MCP

24
Q

which hand muscles are innervated by median N

A

thenar group and lumbricals 1, 2

25
Q

which hand muscles are innervated by ulnar N

A

adductor pollicis
hypothenar group
lumbricals 3,4
dorsal and palmar interossei

ANA126 (40 decks)

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