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Muscles > Hand > Flashcards

Hand Flashcards

1
Q

Lumbricals origin

A

Tendons of the flexor digitorum profundus. 1st: radial side of the tendon of the index finger 2nd: radial side of the tendon of the middle finger 3rd: tendons of the middle and ring fingers 4th: tendons of the ring and little fingers

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2
Q

Lumbricals insertion

A

Radial side of the extensor hood of the corresponding finger

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3
Q

Lumbricals nerve supply

A

1st and 2nd lumbricals median n. 3rd and 4th lumbricals ulnar n. C8, T1

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4
Q

Lumbricals function

A

Flexion of the MCP jts 2-5, extension of the PIP and DIP jts 2-5

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5
Q

Palmar interossei origin

A

Palmar surface of MC bones 2,4,5 1st: ulnar side of the 2nd MC bone 2nd: radial side of the 4th MC bone 3rd: radial side of the 5th MC bone

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6
Q

Palmar interossei insertion

A

1st: ulnar side of the base of the prox phalanx and the extensor hood of the 2nd digit 2nd: radial side of the base of the prox phalanx and the extensor hood of the 4th digit 3rd: radial side of the base of the prox phalanx and the extensor hood of the 5th digit

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7
Q

Palmar interossei nerve supply

A

Ulnar n. C8, T1

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8
Q

Palmar interossei function

A

Adduction and flexion of the 2nd, 4th, 5th MCP jts; extension of the PIP and DIP jts of digits 2, 4, 5

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9
Q

Dorsal interossei origin

A

By 2 heads from adjacent MC bones

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10
Q

Dorsal interossei insertion

A

1st: radial side of the proximal phalanx and the extensor hood of the 2nd digit 2nd: radial side of the proximal phalanx and the extensor hood of the 3rd digit 3rd: ulnar side of the proximal phalanx and the extensor hood of the 3rd digit 4th: ulnar side of the proximal phalanx and the extensor hood of the 4th digit

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11
Q

Dorsal interossei nerve supply

A

Ulnar n. C8, T1

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12
Q

Dorsal interossei function

A

Abduction and flexion of the 2nd, 3rd, and 4th MCP jts; extension of the PIP and DIP jts of digits 2, 3, and 4

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13
Q

Flexor digitorum superficialis origin

A

Humeroulnar head: medial epi of the humerus via the common flexor tendon, the ulnar collateral ligament of the elbow; the coranoid process of the ulna Radial head: anterior surface of the radius

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14
Q

Flexor digitorum superficialis insertion

A

Via 2 slips into the sides of the middle phalanx of digits 2-5

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15
Q

Flexor digitorum superficialis nerve supply

A

Median n. C7, C8, T1

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16
Q

Flexor digitorum superficialis function

A

Flexion of the PIP jts of digits 2-5; assists in flex of the MCP jts of digits 2-5 and the wrist

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17
Q

Flexor digitorum profundus origin

A

Upper ¾ of the ulna, the coronoid process of the ulna, interosseous membrane

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18
Q

Flexor digitorum profundus insertion

A

Base of the distal phalanges of digits 2-5

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19
Q

Flexor digitorum profundus nerve supply

A

Median and ulnar n. C8, T1

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20
Q

Flexor digitorum profundus function

A

Flexion of the DIP jts of digits 2-5; assists in flexing the PIP and MCP jts of digits

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21
Q

Extensor digitorum origin

A

Lateral epicondyle of the humerus via the common extensor tendon

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22
Q

Extensor digitorum insertion

A

Middle and distal phalanges of digits 2-5 via the extensor hood or expansion

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23
Q

Extensor digitorum nerve supply

A

Deep radial n. C6-8

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24
Q

Extensor digitorum function

A

Extension of digits 2-5; assists in wrist extension

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25
Q

Extensor indicis origin

A

Posterior surface of the ulna; interosseous membrane

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26
Q

Extensor indicis insertion

A

Extensor hood of the index finger

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27
Q

Extensor indicis nerve supply

A

Deep radial n. C6-8

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28
Q

Extensor indicis function

A

Extension of the index finger; assists in wrist extension

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29
Q

Extensor digiti minimi origin

A

lateral epicondyle of the humerus via the common extensor tendon; intermuscular septa

30
Q

Extensor digiti minimi insertion

A

Extensor hood on the dorsum of the proximal phalanx of digit 5

31
Q

Extensor digiti minimi nerve supply

A

Deep radial n. C6-8

32
Q

Extensor digiti minimi function

A

Extension of digit 5; assists in wrist extension

33
Q

Abductor digiti minimi origin

A

Pisiform bone and the tendon of the flexor carpi ulnaris

34
Q

Abductor digiti minimi insertion

A

Ulnar side of the base of the proximal phalanx of the 5th digit; aponeurosis of the extensor digiti minimi

35
Q

Abductor digiti minimi nerve supply

A

Ulnar nerve C8-T1

36
Q

Abductor digiti minimi function

A

Abduction and flexion of the 5th MCP joint

37
Q

Flexor pollicis brevis origin

A

Flexor retinaculum, trapezium, trapezoid and capitates

38
Q

Flexor pollicis brevis insertion

A

Radial side of the base of the proximal phalanx of the thumb

39
Q

Flexor pollicis brevis nerve supply

A

Median and ulnar n. C8-T1

40
Q

Flexor pollicis brevis function

A

Flexion of the MCP of the thumb

41
Q

Flexor pollicis longus origin

A

Anterior aspect of the radius, the coronoid process of the ulna, and the interosseous membrane

42
Q

Flexor pollicis longus insertion

A

Base of the distal phalanx of the thumb

43
Q

Flexor pollicis longus nerve supply

A

Anterior interosseous (median) n. C8, T1

44
Q

Flexor pollicis longus function

A

Flexion of the IP joint of the thumb; assists in flexion of the MCP joint of the thumb

45
Q

Extensor pollicis brevis origin

A

Posterior aspect of the radius; the interosseous membrane

46
Q

Extensor pollicis brevis insertion

A

Base of the proximal phalanx of the thumb

47
Q

Extensor pollicis brevis nerve supply

A

Deep radial n. C6, C7

48
Q

Extensor pollicis brevis function

A

Extension of the MCP and CMC joints of the thumb

49
Q

Extensor pollicis longus origin

A

Dorsolateral surface of the ulna; interosseous membrane

50
Q

Extensor pollicis longus insertion

A

Base of the distal phalanx of the thumb

51
Q

Extensor pollicis longus nerve supply

A

Deep radial n. C6-8

52
Q

Extensor pollicis longus function

A

Extension of the IP jt of the thumb; assists in extending the MCP and CMC joints of the thumb

53
Q

Abductor pollicis longus origin

A

Posterior surface of the ulna and radius; interosseous membrane

54
Q

Abductor pollicis longus insertion

A

Radial side of the base of the 1st MC bone

55
Q

Abductor pollicis longus function

A

Deep radial n.C6,C7

56
Q

Abductor pollicis longus function

A

Abduction and extension of the CMC joint of the thumb; assists in abduction (radial deviation) and flexion of the wrist

57
Q

Abductor pollicis brevis origin

A

Flexor retinaculum; scaphoid, trapezium

58
Q

Abductor pollicis brevis insertion

A

Radial side of the base of the proximal phalanx of the thumb

59
Q

Abductor pollicis brevis nerve supply

A

Median n. C8, T1

60
Q

Abductor pollicis brevis function

A

ABduction of the CMC and MCP joints of the thumb

61
Q

Adductor pollicis origin

A

Oblique head: capitates, trapezoid, trapezium, MC 1-4 Transverse head: palmar surface of the 3rd MC bone

62
Q

Adductor pollicis insertion

A

Ulnar side of the base of the proximal phalanx of the thumb

63
Q

Adductor pollicis nerve supply

A

Ulnar n. C8, T1

64
Q

Adductor pollicis function

A

Adduction of the thumb

65
Q

Opponens pollicis origin

A

Flexor retinaculum, trapezium bone

66
Q

Opponens pollicis insertion

A

Radial side of the 1st MC

67
Q

Opponens pollicis nerve supply

A

Median n. C8, T1

68
Q

Opponens pollicis function

A

Opposition at the CMC jt of the thumb

69
Q

Opponens digiti minimi origin

A

Flexor retinaculum; hook of the hamate

70
Q

Opponens digiti minimi insertion

A

Ulnar side of the 5th MC

71
Q

Opponens digiti minimi nerve supply

A

Ulnar n. C8, T1

72
Q

Opponens digiti minimi function

A

Opposition at the CMC joint of the 5th digit

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