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Hand muscles Flashcards

0
Q

Innervation of opponens pollicis

A

Recurrent branch of median nerve C8 and T1

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1
Q

Insertion of opponens pollicis

A

Lateral side of the 1st metacarpal

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2
Q

Action of opponens pollicis

A

Opposes thumb

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3
Q

Origin of abductor pollicis brevis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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4
Q

Insertion of abduction pollicis brevis

A

Lateral side on the base of the proximal phalanx of thumb

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5
Q

Innervation of abductor pollicis brevis

A

Recurrent median branch C8 and T1

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6
Q

Action of abductor pollicis brevis

A

Abducts the thumb and helps oppose it

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7
Q

Origin of flexor pollicis brevis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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8
Q

Insertion of flexor pollicis brevis

A

Lateral side of base of proximal phalanx of thumb

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9
Q

Innervation of flexor pollicis brevis

A

Superficial: recurrent branch of median nerve C8 and T1
Deep: deep ulnar nerve C8 and T1

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10
Q

Action of flexor pollicis brevis

A

Flexes the thumb

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12
Q

Origin of adductor pollicis

A

Oblique: base of 2nd and 3rd metacarpal and capitate
Transverse: anterior side of medial shaft of 3rd metacarpal

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13
Q

Insertion of adductor pollicis

A

Medial side of base of proximal phalanx of thumb

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14
Q

Innervation of adductor pollicis

A

Deep radial C8 and T 1

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15
Q

Action of adductor pollicis

A

Adducts thumb

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16
Q

Origin of Abductor digiti minimi

A

Pisiform

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17
Q

Insertion of Abductor digiti minimi

A

Medial side of base of proximal phalanx of 5th finger

18
Q

Innervation of Abductor digiti minimi

A

Deep branch of ulnar nerve C8 and T1

19
Q

Action of Abductor digiti minimi

A

Abducts 5th finger, assists in flexion of its proximal phalanx

20
Q

Origin of flexor digiti brevis

A

Hook of hamate and flexor retinaculum

21
Q

Insertion of flexor digiti brevis

A

Medial side of base of proximal phalanx of 5th finger

22
Q

Innervation of flexor digiti brevis

A

Deep branch of ulnar nerve C8 and T1

23
Q

Action of flexor digiti brevis

A

Flexes proximal phalanx of 5th finger

24
Q

Origin of opponens digiti minimi

A

Hook of hamate and flexor retinaculum

25
Q

Insertion of opponens digiti minimi

A

Medial border of 5th metacarpal

26
Q

Innervation of opponens digiti minimi

A

Deep branch of ulnar nerve C8 and T1

27
Q

Action of opponens digiti minimi

A

Draws 5t metacarpal anteriorly and rotates it

28
Q

Origin of lumbricals

A

1 and 2: lateral two tendons of flexor digitorum profundas

3 and 4: medial three tendons of flexor digitorum profundas

29
Q

Insertion of lumbricals

A

Lateral sides of extensor expansions 2-5 fingers

30
Q

Innervation of lumbricals

A

Median nerve C8 and T1

31
Q

Action of lumbricals

A

Flex metacarpalphalangeal joint ps and extend interphalangeal joints of fingers 2-5

32
Q

Origin of dorsal interossei 1-4

A

Adjacent sides of two metacarpals

33
Q

Insertion dorsal interossei 1-4

A

Bases of proximal phalanxes and extensor expansions of fingers 2-5

34
Q

Innervation of dorsal interossei

A

Deep branch of ulnar nerve C8 ans T1

35
Q

Action of dorsal interossei

A

Abduct 2-4 fingers from axial line, act with lumbricals in flexing metacarpophalageal joints and extending interphalangeal joints

36
Q

Origin of palmar interossei

A

Palmar surface of 2nd 4th and 5th metacarpals

37
Q

Insertion of palmar interossei

A

Base of proximal phlanxes, extensor expansions 2nd, 4th , and 5th finger

38
Q

Innervation of palmar interossei

A

Deep branch of ulnar nerve C8 and T1

39
Q

Action of palmar interossei

A

Adducts 2nd 4th and 5th finger towards axial line, assists lumbrical in flexing metacarpalphalangeal joint and extending interphalangeal joints

50
Q

Origin of opponens pollicis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

gross (13 decks)

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