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Functional Anatomy > Intrinsic Muscles Of The Hand > Flashcards

Intrinsic Muscles Of The Hand Flashcards

0
Q

Proximal and distal attachment of opponens pollicis

A

P: flexor retinaculum and tubercles of scaphoid and trapezium
D: lateral side of 1st metacarpal

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1
Q

Name the thenar muscles

A

Opponents pollicis, flexor pollicis brevis, abductor pollicis brevis and adductor pollicis

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2
Q

Innervation of opponens pollicis

A

Median nerve

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3
Q

Actions of opponens pollicis

A

Oppose the thumb by drawing 1st metacarpal medially to Palm and rotating it medially

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4
Q

O and I of abductor pollicis brevis

A

O: flexor retinaculum and tubercles of scaphoid and trapezium
I: lateral side of base of proximal phalanx of thumb

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5
Q

Innervation of abductor pollicis brevis

A

Median nerve

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6
Q

Action if abductor pollicis brevis

A

Adducts the thumb, helps oppose it

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7
Q

O and I of flexor pollicis brevis

A

O: flexor retinaculum and tubercles of scaphoid and trapezium
I: lateral side of base of 1st phalanx of the thumb

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8
Q

Innervations for flexor pollicis brevis

A

Superficial head = median nerve

Deep head = ulnar nerve

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9
Q

Action of flexor pollicis brevis

A

Flexes thumb

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10
Q

O and I of adductor pollicis

A

O of Oblique head: bases if 2nd and 3rd metacarpals, capitate and adjacent carpals
O of Transverse head: anterior surface of shaft of 3rd metacarpal

I: medial side of base of proximal phalanx of thumb

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11
Q

Innervation of adductor pollicis

A

Ulnar nerve

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12
Q

Action of adductor pollicis

A

Adducts thumb towards border of Palm

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13
Q

List the hypothenar muscles

A

Abductor Digiti Minimi
Flexor Digiti Minimi brevis
Opponens Digiti

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14
Q

Origin and insertion of abductor Digiti Minimi

A

O: pisiform
I: medial side if base of proximal phalanx of 5th digit

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15
Q

Nerve for abductor Digiti Minimi

A

Ulnar nerve

16
Q

Action of abductor Digiti Minimi

A

Abducts 5th digit

Assists in flexion of its proximal phalanx

17
Q

Flexor Digiti Minimi o and I

A

O: hook of hamate and flexor retinaculum
I: medial border of 5th metacarpal

18
Q

Nerve for flexor Digiti Minimi

A

Ulnar nerve

19
Q

Action of flexor Digiti Minimi

A

Flexes prox phalanx of 5th digit

20
Q

Opponens Digiti o and I

A

O: hook of hamate and flexor retinaculum
I: medial border of 5th metacarpal

21
Q

Innervation of opponens Digiti

A

Ulnar nerve

22
Q

Action of opponens Digiti

A

Draws 5th metacarpal anterior and rotates it, bringing 5th digit into opposition with thumb

23
Q

Name short muscles of hand

A

Lumberjacks and interossei

24
Q

O and I of 1st and 2nd lumbricals

A

O: lateral 2 tendons of flexor digitorum Profundus
I: lateral side of extensor expansion and 2nd-5th (radial side)

25
Q

Innervation of 1st and 2nd lumbricals

A

Median nerve

26
Q

Action of lumbricals

A

Flex the MCP joints; extend interphalangeal joints of 2nd-5th digits

27
Q

O and I of lumbricals 3-4

A

O: medial 3 tendons of flexor digitorum Profundus
I: lateral side of extension expansion of 2nd - 5th digits (radial side)

28
Q

Innervation of 3rd &4rth lumbricals

A

Ulnar nerve

29
Q

O and I of dorsal interossei 1-4

A

O: adjacent sides of 2metacarpals (bi-pennate muscles)
I: bases of proximal phalanges and extensor expansion of 2-4 digits

30
Q

Innervation of interossei

A

Ulnar nerve

31
Q

Action of dorsal interossei 1-4

A

Abduct 2-4th digits from axial line

Acts with lumbricals in flexing the MCP joints and extending the interphalangeal joints

32
Q

O and I of palmar interossei 1-3

A

O: Palmar surfaces of 2, 4& 5th metacarpals (uni pennate )
I: bases of prox phalanges, extensor expansions of 2nd, 4rth and 5th digits

33
Q

Action of interossei Palmer

A

Adducts 2,4,5 digits towards axial line, assists lumbricals in flexing metacarpophalangeal joints and extending into phalangeal joints,

Functional Anatomy (18 decks)

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