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Upper Extremity Function > Wrist/Hand Musculature > Flashcards

Wrist/Hand Musculature Flashcards

1
Q

What is the origin of the Extensor Digitorum?

A

Lateral Epicondyle

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2
Q

What is the insertion of the Extensor Digitorum?

A

Base of middle and distal phalanx 2-5

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3
Q

What is the action of the Extensor Digitorum?

A

Extends MCP and IP joints

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4
Q

What is the innervation of the Extensor Digitorum?

A

Radial Nerve C6-8

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5
Q

What is the origin of the Flexor Digitorum Profundus?

A

Anterior medial proximal 3/4 of Ulna

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6
Q

What is the Insertion of the Flexor Digitorum Profundus?

A

Base of anterior distal phlanges 1-4

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7
Q

What is the action of the Flexor Digitorum Profundus?

A

Flexes distal IP 2-5, assist with flex PIP and MCP

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8
Q

What is the innervation of the Flexor Digitorum Profundus?

A

I/II Median C8-T1

III/IV Ulnar C8-T1

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9
Q

What is the origin of the Adductor Pollicis?

A

Capitate, base of 2/3 metacarpals, palmer surface of 3rd metacarpal

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10
Q

What is the insertion of the Adductor Pollicis?

A

Ulnar side base proximal phalanx of the thumb, extensor expansion

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11
Q

What is the action of the Adductor Pollicis?

A

Adducts the CMC, assists with flexion

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12
Q

What is the innervation of the Adductor Pollicis?

A

Ulnar C8-T1

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13
Q

What is the origin of the Abductor Pollicis Brevis?

A

Flex Retinaculum, tubercle of trapezium, tubercle of scaphoid

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14
Q

What is the insertion of the Abductor Pollicis Brevis?

A

Base of Proximal Phalanx of thumb (radial side), extensor expansion

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15
Q

What is the Action of the Abductor Pollicis Brevis?

A

Abducts 1st CMC, extends IP

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16
Q

What is the Innervation of the Abductor Pollicis Brevis?

A

Median C6-T1

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17
Q

What is the Origin of the Opponens Pollicis?

A

Tubercle of trapezium, flex retinaculum

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18
Q

What is the Insertion of the Opponens Pollicis?

A

length of 1st metacarpal (Radial side)

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19
Q

What is the Action of the Opponens Pollicis?

A

Opposes CMC

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20
Q

What is the Innervation of the Opponens Pollicis?

A

Median C6-T1

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21
Q

What is the Origin of the Flexor Pollicis Longus?

A

Anterior surface middle radius, interosseus membrane, medial epicondyle

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22
Q

What is the Insertion of the Flexor Pollicis Longus?

A

Base distal 1st Phalanx (Palmer surface)

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23
Q

What is the Action of the Flexor Pollicis Longus?

A

Flex IP of thumb, assist flex of MCP and CMC

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24
Q

What is the Innervation of the Flexor Pollicis Longus?

A

Median C8-T1

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25
Q

What is the Origin of the Flexor Pollicis Brevis?

A

Flex Retinaculum, trapezium, trapezoid, capitate

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26
Q

What is the Insertion of the Flexor Pollicis Brevis?

A

base of proximal Phalanx (Radial side)

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27
Q

What is the Action of the Flexor Pollicis Brevis?

A

Flexes MCP and CMC, assists in Opposition

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28
Q

What is the Innervation of the Flexor Pollicis Brevis?

A

Median C6-T1

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29
Q

What is the Origin of the Extensor Pollicis Longus?

A

Middle 1/3 posterior surface Ulna

30
Q

What is the Insertion of the Extensor Pollicis Longus?

A

Base of distal phalanx of thumb, (Dorsal surface)

31
Q

What is the Action of the Extensor Pollicis Longus?

A

Extends IP, assists with MCP and CMC extension of thumb

32
Q

What is the Innervation of the Extensor Pollicis Longus?

A

Radial C7-8

33
Q

What is the Origin of the Extensor Pollicis Brevis?

A

Posterior surface distal radius

34
Q

What is the Insertion of the Extensor Pollicis Brevis?

A

Base Prox. Phalanx

35
Q

What is the Action of the Extensor Pollicis Brevis?

A

Extends MCP, Ext and ABD CMP, Assists RD (Radial Deviation)

36
Q

What is the Innervation of the Extensor Pollicis Brevis?

A

Radial C7-8

37
Q

What is the Origin of the Abductor Pollicis Longus?

A

Post surface body distal ulna, 1/3 body of radius

38
Q

What is the Insertion of the Abductor Pollicis Longus?

A

Base of 1st Metacarpal (Radial side)

39
Q

What is the Action of the Abductor Pollicis Longus?

A

ABD and Ext CMC, assists wrist flex and ABD/RD

40
Q

What is the Innervation of the Abductor Pollicis Longus?

A

Radial C7-8

41
Q

What is the Origin of the Opponens Digiti Minimi?

A

Hook of hamate, flex retinaculum

42
Q

What is the Insertion of the Opponens Digiti Minimi?

A

Length of 5th metacarpal, (Ulnar side)

43
Q

What is the Action of the Opponens Digiti Minimi?

A

Opposes 5th CMC

44
Q

What is the Innervation of the Opponens Digiti Minimi?

A

Ulnar C8-T1

45
Q

What is the Origin of the Abductor Digiti Minimi?

A

Pisiform, Tendon of flex carpi ulnaris

46
Q

What is the Insertion of the Abductor Digiti Minimi?

A

Ulnar side base of prox phalanx 5th finger, ulnar boarder extensor expansion

47
Q

What is the Action of the Abductor Digiti Minimi?

A

Abducts, assist opposition of 5th MCP

48
Q

What is the Innervation of the Abductor Digiti Minimi?

A

Ulnar C8-T1

49
Q

What is the Origin Flexor Digiti Minimi?

A

Hook of hamate, Flex retinaculum

50
Q

What is the Insertion Flexor Digiti Minimi?

A

Base of prox phalanx little finger (Ulnar side)

51
Q

What is the Action Flexor Digiti Minimi?

A

Flexes MCP of little finger

52
Q

What is the Innervation Flexor Digiti Minimi?

A

Ulnar C8-T1

53
Q

What is the Origin of the Dorsal Interossei?

A

Sides of digits 1-5

54
Q

What is the Insertion of the Dorsal Interossei?

A

Base of prox. phalanx, extensor expansion

55
Q

What is the Action of the Dorsal Interossei?

A

Abducts 2-4, Add Thumb

56
Q

What is the Innervation of the Dorsal Interossei?

A

Ulnar C8-T1

57
Q

What is the Origin of the Palmer Interossei?

A

Base of 1st MC ulnar side, length 2-5 MC

58
Q

What is the Insertion of the Palmer Interossei?

A

Extensor expansion of same digit

59
Q

What is the Action of the Palmer Interossei?

A

Adduct fingers 1,2,4,5 (all except 3)

60
Q

What is the Innervation of the Palmer Interossei?

A

Ulnar C8-T1

61
Q

What is the Origin of the Lumbricales?

A

Sides of 2-5, flex profundus tendons

62
Q

What is the Insertion of the Lumbricales?

A

Radial boarder extensor expansion 2-5?

63
Q

What is the Action of the Lumbricales?

A

Extends IP 2-5, Flex MCP 2-5

64
Q

What is the Innervation of the Lumbricales?

A

Median C8-T1

Ulnar C8-T1

65
Q

What is the Origin of the Extensor Indicis?

A

Post Surface body distal Ulna

66
Q

What is the Insertion of the Extensor Indicis?

A

Extension expansion index finger

67
Q

What is the Action of the Extensor Indicis?

A

Ext MCP and IP index finger

68
Q

What is the Innervation of the Extensor Indicis?

A

Radial C7-8

69
Q

What is the Origin of the Extensor Digiti Minimi?

A

Lateral Epicondyle

70
Q

What is the Insertion of the Extensor Digiti Minimi?

A

Extensor expansion of 5th digit

71
Q

What is the Action of the Extensor Digiti Minimi?

A

Extends MCP and IP of the 5th digit

72
Q

What is the Innervation of the Extensor Digiti Minimi?

A

Radial C7-8

Upper Extremity Function (2 decks)

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