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GBE > Forearm and wrist joint > Flashcards

Forearm and wrist joint Flashcards

1
Q

Describe brachoradialis

A

O: prox 2/3 of supra-epicondylar ridge of humerus
A: lateral surface of distal end of the radius
I: Radial nerve (C5,6,7)
Fn: weak flexion, maximal when midpronation

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2
Q

What is the origin of brachoradialis?

A

proximal 2/3 of supra-epicondylar ridge of humerus

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3
Q

What is the attachment of brachoradialis

A

lateral surface of distal end of radius

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4
Q

What is the innervation of brachoradialis

A

Radial nerve C5,6,7

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5
Q

What is the funtion of brachoradialis

A

Weak flexion, maximal when midpronated

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6
Q

Describe extensor carpi radialis longus

A

O: lateral supracondylar ridge of humerus
A: dorsal aspect of base of 2nd metacarpal
I: radial nerve C6,7
Fn: extends wrist joint and abducts hand

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7
Q

What is the origin of extensor carpi radialis longus?

A

lateral supracondylar ridge of humerus

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8
Q

What is the attachment of extensor carpi radialis longus?

A

dorsal aspect of base of 2nd metacarpal

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9
Q

What is the innervation of extensor carpi radialis longus?

A

Radial nerve C6,7

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10
Q

What is the function of extensor carpi radialis longus?

A

Extends wrist joint and abducts hand

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11
Q

Describe extensor carpi radialis brevis

A

O: lateral epicondyle of humerus
A: dorsal aspect of base of the 3rd metacarpal
I: deep branch of the radial nerve C7,8
Fn: extends and abducts hand at wrist

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12
Q

What is the origin of extensor carpi radialis brevis?

A

Lateral epicondyle of humerus

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13
Q

What is the attachment of extensor carpi radialis brevis?

A

Dorsal aspect of base of 3rd metacarpal

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14
Q

What is the innervation of extensor carpi radialis brevis?

A

Deep branch of radial nerve

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15
Q

What is the function of extensor carpi radialis brevis

A

Extends and abducts hand at wrist

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16
Q

Describe extensor digitorum

A

O: lateral epicondyle of humerus
A: extensor expansions of medial 4 fingers
I: posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extends medial 4 fingers

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17
Q

What is the origin of extensor digitorum

A

Lateral epicondyle of humerus

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18
Q

What is the attachment of extensor digitorum

A

Extensor expansions of medial 4 fingers

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19
Q

What is the innervation of extensor digitorum?

A

posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

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20
Q

What is the function of extensor digitorum?

A

Extension of medial 4 fingers

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21
Q

Describe extensor digiti minimi

A

O: lateral epicondyle of humerus
A: extensor expansion of the 5th finger
I: posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extension of the pinky finger

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22
Q

What is the origin of extensor digiti minimi

A

lateral epicondyle of the humerus

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23
Q

What is the attachment of extensor digiti minimi

A

extensor expansion of the5th finger

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24
Q

What is the innervation of extensor digiti minimi

A

posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

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25
Q

What is the function of extensor digiti minimi

A

extension of the 5th finger

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26
Q

Describe extensor carpi ulnaris

A

O: lateral epicondyle of humerus
A: dorsal aspect of the base of 5th metacarpal
I: posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extends and adducts hand at the wrist

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27
Q

What is the origin of extensor carpi ulnaris

A

medial epicondyle of humerus

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28
Q

What is the attachment of extensor carpi ulnaris

A

dorsal aspect of the base of the 5th metacarpal

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29
Q

What is the innervation of extensor carpi ulnaris

A

posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

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30
Q

What is the function of extensor carpi ulnaris

A

Extension and adduction of hand

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31
Q

What are the muscles in the superficial layer of the posterior compartment of the forearm?

A 
Extensor carpi radialis longus + brevis
brachoradialis
Extensor carpi ulnaris
Extensor digitorum
Extensor digit minimi
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32
Q

What are the muscles in the deep layer of the posterior compartment of the forearm?

A 
Supinator
abductor pollicis longus
extensor pollicis longus
extensor pollicis brevis
extensor indicis
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33
Q

Describe supinator

A

O: lateral epicondyle of the humerus
A: prox 1/3 of the radius
I: deep branch of the radial nerve (C7)
Fn: supination

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34
Q

What is the origin of supinator

A

lateral epicondyle of humerus

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35
Q

What is the attachment of supinator

A

prox 1/3 of the radius

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36
Q

What is the innervation of supinator

A

deep branch of the radial nerve (C7)

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37
Q

Describe abductor pollicis longus

A

O: posterior surface of prox 1/2 of ulna, radius and interosseous membrane
A: base of 1st metacarpal
I: post. interosseous nerve (C7,8) continuation of deep branch of the radial nerve
Fn: abducts 1st finger

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38
Q

What is the origin of abductor pollicis longus

A

post surface of prox 1/2 of ulna, radius and interosseous membrane

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39
Q

What is the attachment of abductor pollicis longus

A

base of 1st metacarpal

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40
Q

What is the innervation of abductor pollicis longus

A

post interosseous nerve (C7,8) continuation of deep branch of the radial nerve

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41
Q

What is the function of abductor pollicis longus

A

abduction of thumb

42
Q

Describe extensor pollicis longus

A

O: post surface of middle 1/3 of ulna and interosseous membrane
A: dorsal aspect of base of distal phalanx of thumb
I: post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extension of the thumb

43
Q

What is the origin of extensor pollicis longus

A

post surface of middle 1/3 of ulna and interosseous membrane

44
Q

What is the attachment of extensor pollicis longus

A

dorsal surface of base of distal phalanx of thumb

45
Q

What is the innervation of extensor pollicis longus

A

post interosseous membrane (C7,8) a continuation of the deep branch of the radial nerve

46
Q

What is the function of extensor pollicis longus?

A

extension of the thumb

47
Q

Describe extensor pollicis brevis?

A

O: post surface of distal 1/3 of radius and interosseous membrane
A: dorsal aspect of base of prox phalanx of thumb
I: post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extension of thumb

48
Q

What is the origin of extensor pollicis brevis?

A

post surface of distal 1/3 of radius and interosseous membrane

49
Q

What is the attachment of extensor pollicis brevis?

A

dorsal surface of base of proximal phalanx of thumb

50
Q

What is the innervation of extensor pollicis brevis?

A

post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

51
Q

What is the function of extensor pollicis brevis

A

extension of thumb

52
Q

Describe extensor indicis

A

O: post surface of distal 1/3 of ulna + interosseous membrane
A: extensor expansion of index finger
I: post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extends index finger

53
Q

What is the origin of extensor indicis

A

post surface of distal 1/3 of the ulna and interosseous membrane

54
Q

What is the attachment of extensor indicis

A

extension expansion of index finger

55
Q

What is the innervation of extensor indicis

A

post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

56
Q

What is the function of extensor indicis

A

extension of index finger

57
Q

What lines the anatomical snuff box

A

extensor pollicis longus and brevis

58
Q

How does the radial nerve in the arm?

A

Anteriorly in the arm until the elbow (where it runs past the funny bone) and then is posteriorly and laterally

59
Q

What muscles make up the superficial layer of the anterior compartment of the forearm?

A 
Pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
flexor digitorum superficialis
60
Q

Describe pronator teres

A

O: (ulnar head) coronoid process of ulna
(humeral head) medial epicondyle of humerus
A: middle convexity of lateral surface of radius
I: median nerve (C6,7)
Fn: pronates and flexes forearm

61
Q

What is the origin of pronator teres?

A

ulnar head: coronoid process of ulna

humeral head: medial epicondyle of humerus

62
Q

What is the attachment of pronator teres ?

A

middle convexity of lateral surface of radius

63
Q

What is the innervation of pronator teres?

A

median nerve (C6,7)

64
Q

What is the function of pronator teres?

A

pronates + flexes forearms

65
Q

Describe flexor carpi radialis

A

O: medial epicondyle of humerus
A: base of 2nd metacarpal
I: median nerve (C6,7)
Fn: flexes and abducts hand

66
Q

What is the origin of flexor carpi radialis

A

medial epicondyle of humerus

67
Q

What is the attachment of flexor carpi radialis

A

base of 2nd metacarpal

68
Q

What is the innervation of flexor carpi radialis

A

median nerve (C6,7)

69
Q

What is the function of flexor carpi radialis

A

flexes and abducts hand

70
Q

Describe palmaris longus

A

O: medial epicondyle of humerus
A: palmar aponeurosis
I: median nerve (C7,8)
Fn: flexes head + tenses aponeurosis

71
Q

What is the origin of palmaris longus?

A

medical epicondyle of humerus

72
Q

What is the attachment of palmaris longus

A

palmar aponeurosis

73
Q

What is the innervation of palmaris longus

A

median nerve (C7,8)

74
Q

What is the function palmaris longus?

A

flexes head + tenses aponeurosis

75
Q

Describe flexor carpi ulnaris

A

O: olecranon
A: 5th metacarpal
I: ulnar nerve (C7,8)
Fn: flexes + adducts hand

76
Q

What is the origin of flexor carpi ulnaris?

A

olecranon

77
Q

What is the attachment of flexor carpi ulnaris

A

5th metacarpal

78
Q

What is the innervation of flexor carpi ulnaris

A

median nerve (C7,8)

79
Q

What is the function of flexor carpi ulnaris?

A

flexes and adducts hand

80
Q

Describe flexor digitorum superficialis

A 
O: (humero-ulnar head) medial epicondyle of humerus
(radial head) oblique line of radius
A: middle phalanges of medial 4 digits
I: median nerve (C7,8 T1)
Fn: flexes digits
81
Q

What is the origin flexor digitorum superficialis

A

(humero-ulnar head) medial epicondyle of humerus

(radial head) oblique line of radius

82
Q

What is the attachment of flexor digitorum superficialis

A

middle phalanges of medial 4 digits

83
Q

What is the innervation of flexor digitorum superficialis

A

median nerve (C7,8 T1)

84
Q

What is the function of flexor digitorum superficialis

A

flexes digits

85
Q

What muscles make up the deep layer of the anterior compartment of the forearm?

A

Flexor digitorum profundus
flexor pollicis longus
pronator quadratus

86
Q

Describe flexor digitorum profundus

A

O: prox. 3/4 of medial and ant surfaces of ulna interosseous membrane
A: bases of distal phalanges of medial 4 digits
I: index and middle = median nerve; ring and pinky = ulnar nerve
Fn: flexor of digits + assists w/ wrist flexion

87
Q

What is the origin of flexor digitorum profundus

A

prox. 3/4 of medial and ant. surfaces of ulna interosseous

88
Q

What is the attachment of flexor digitorum profundus

A

bases of distal phalanges of medial 4 digits

89
Q

What is the innervation of flexor digitorum profundus

A

index + middle = median nerve; ring + pinky = ulnar nerve

90
Q

What is the function of flexor digitorum profundus

A

flexor of digits + assists w/wrist flexion

91
Q

Describe flexor pollicis longus

A

O: ant surface of radius
A: base of distal phalanx of thumb
I: ant interosseous nerve (from median nerve)
Fn: flexes thumb

92
Q

What is the origin of flexor pollicis longus

A

ant surface of radius

93
Q

What is the attachment of flexor pollicis longus

A

base of distal phalanx of thumb

94
Q

What is the innervation of the flexor pollicis longus

A

ant interosseous nerve, from the median nerve

95
Q

What is the function of flexor pollicis longus

A

flexes thumb

96
Q

Describe pronator quadratus

A

O: distal 1/4 of ant surface of ulna
A: distal 1/4 of ant surface of radius
I: ant interosseous nerve, from median nerve
Fn: pronates forearm

97
Q

What is the origin of pronator quadratus

A

distal 1/4 of ant surface of ulna

98
Q

What is the attachment of pronator quatratus

A

distal 1/4 of ant surface of radius

99
Q

What is the innervation of pronator quadratus

A

ant interosseous nerve, from median nerve

100
Q

What structure limits the abduction of the wrist

A

styloid process of the radius

GBE (48 decks)

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