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Gross anatomy second exam > muscles of the hand > Flashcards

muscles of the hand Flashcards

0
Q

Opponens pollicis proximal and distal attachment

A

proximal: flexor retinaculum and tubercles of scaphoid and trapezium
distal: lateral side of 1st metacarpal

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1
Q

thenar muscles?

A

opponens pollicis, abductor pollicis brevis, flexor pollicis brevis, adductor pollicis

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2
Q

Abductor pollicis brevis proximal and distal attachment

A

Proximal: Flexor retinaculum and tubercles of scaphoid and trapezium

distal: Lateral side of base of proximal phalanx of thmub

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3
Q

Flexor pollicis brevis proximal and distal attachment

A

Proximal: flexor retinaculum and tubercle of scaphoid and trapezium

Distal: lateral side of base of proximal phalanx of thumb

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4
Q

Opponens pollicis innervation and actions

A

innervation: Recurrent branch of median nerve (C8, T1)
action: to oppose thumb, it draws 1st metacarpel medially to center of palm and rotates it Medially

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5
Q

Abductor pollicis brevis innervation and actions

A

Innervation: recurrent branch of median nerve C8, T1

action: Abducts thumb, helps oppose it

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6
Q

Flexor pollicis brevis innervation and actions

A

Innervation: Recurrent branch of median nerve C8, T1

Action: Flexes thumb

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8
Q

Abductor digit minimi innervation and actions

A

Innervation: Deep branch of ulnar nerve C8, T1

Action: Abducts 5th finger assists in flexion of its proximal phalanx

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9
Q

Flexor digiti minimi brevis innervation and actions

A

Innervation: deep branch of ulnar nerve C8, T1

action: Flexes proximal phalanx of 5th finger

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10
Q

Opponens digiti minimi innervation and actions

A

innervation: Deep branch of ulnar nerve C8, T1

Action: draws 5th metacarpal anterior and rotates it, bringing 5th finger into opposition with thumb

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11
Q

Abductor digiti minimi Proximal and distal attachment

A

Proximal: Pisiform

distal: Medial side of base of proximal phalanx of 5th finger

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12
Q

Flexor digiti minimi brevis Proximal and distal attachment

A

Proximal: Hook of hamate and flexor retinaculum

Distal: Medial side of base of proximal phalanx of 5th finger

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13
Q

Opponens digiti minimi Proximal and distal attachment

A

Proximal: Hook of hamate and flexor retinaculum

Distal: Medial border of 5th metacarpel

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14
Q

Short muscles?

A

Lumbricals, Dorsal interossei, palmar interossei

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15
Q

Lumbericals I and 2 Proximal and distal attachment

A

Proximal: Lateral two tendons of flexor digitorum profundus (as unipennate muscles)

Distal: Lateral sides of extensor expansions of 2nd-5th fingers

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16
Q

Lumbricals 3 and 4 Proximal and distal attachment

A

Proximal: medial three tendons of flexor digitorum profundus (as bipennate muscles)

Distal: Lateral sides of extensor expansions of 2nd-5th fingers

17
Q

Dorsal interossei 1-4 Proximal and distal attachment

A

Proximal: Adjacent sides of 2 metacarpels (as bipennate muscles)

Distal: Bases of proximal phalanges; extensor expansions of 2nd-4th fingers

18
Q

Palmar interossei 1-3 Proximal and distal attachment

A

Proximal: Palmar surfaces of 2nd, 4th, and 5th metacarpals (as unipennate muscles)

Distal: Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th fingers

19
Q

Lumbericals 1and 2, 3 and 4 (have the same innervation and actions)

A

Innervation: Median nerve C8, T1

Actions:Flex metacarpophalangeal joints, extend interphalangeal joints of 2nd-5th fingers

20
Q

Dorsal interossei 1-4 and Palmar interossei 1-3 innervation (have the same innervation)

A

Deep branch of ulnar nerve C8, T1

21
Q

Dorsal interossei 1-4 actions

A

Abducts 2nd-4th fingers from axial line, act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

22
Q

Palmar interossei 1-3 actions

A

Adduct 2nd, 4th, and 5th fingers toward axial line assist lumbericals in flexing metacarpophalangeal joints and extending interphalangeal joints

25
Q

hypothenar muscles

A

abductor digit minimi, flexor digiti minimi brevis, opponens digiti minimi

26
Q

Adductor pollicis Oblique head and transverse head proximal attachment

A

Oblique head: Bases of 2nd and 3rd metacarpals, capitate, adjacent carpals

Transverse Head: Anterior surface of shaft of 3rd metacarpals

27
Q

Adductors Pollicis Distal attachment

A

Medial side of base of proximal phalanx of 1st finger

28
Q

Adductor Pollicis innervation

A

Deep branch of ulnar nerve C8, T1

29
Q

Adductor Pollicis action

A

Adducts thumb toward lateral border of palm

Gross anatomy second exam (4 decks)

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