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DPT Anatomy Test 3 > Forearm > Flashcards

Forearm Flashcards

1
Q

body of radius has a medial facing sharpened edge indicating the attachment of the

A

interosseus membrane

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2
Q

5 muscles that originate on medial epicondyle of humerus

A 
pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris - humeral head
flexor digitorum superficialis - humeroulnar head
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3
Q

o of pronator teres

A

medial epicondyle of humerus

coronoid process of ulna

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4
Q

i of pronator teres

A

middle of lateral surface of radius

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5
Q

action of pronator teres

A

pronates forearm and flexes it

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6
Q

innervation of pronator teres

A

median n C6-C7

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7
Q

Which two muscles are innervated by median n. C6C7

A

pronator teres

flexor carpi radialis

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8
Q

o of flexor carpi radialis

A

medial epicondyle of humerus

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9
Q

i of flexor carpi radialis

A

base of 2nd metacarpal bone

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10
Q

action of flexor carpi radialis

A

flexes hand and abducts it

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11
Q

innervation of flexor carpi radialis

A

median n. C6C7

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12
Q

o of palmaris longus

A

medial epicondyle of humerus

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13
Q

i of palmaris longus

A

distal 1/2 of flexor retinaculum

palmar aponeurosis

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14
Q

action of palmaris longus

A

flexes hand

tightens palmar aponeurosis

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15
Q

innervation of palmaris longus

A

median n. C7C8

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16
Q

O of flexor carpi ulnaris
humeral head
ulnar head

A

medial epicondyle of humerus

olecranon and posterior border of ulna

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17
Q

i of flexor carpi ulnaris

A

pisiform bone
hook of hamate bone
5th metacarpal bone

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18
Q

action of flexor carpi ulnaris

A

flexes hand
adducts it
(flexion of hand requires both fcr and fcu

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19
Q

innervation of flexor carpi ulnaris

A

ulnar n. C7C8

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20
Q

which muscle of the anterior surface (superficial and intermediate) is not innervated by median n.

A

flexor carpi ulnaris

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21
Q

o of flexor digitorum superficialis

A

humeroulnar -medial epicondyle of humerus, ulnar collateral lig., and coronoid process of ulna
radial head - superior 1/2 of anterior border of radius

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22
Q

i of flexor digitorum superficialis

A

bodies of middle phalanges of medial four digits

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23
Q

action of flexor digitorum superficialis

A

flexes middle phalanges of medial 4 digits

stronger action flexes proximal phalanges and hands

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24
Q

innervation of flexor digitorum superficialis

A

median n. C7-T1

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25
Q

used to increase strength and speed of pronation

A

pronator teres

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26
Q

prime mover of pronation, being responsible for initiation and can act as the only pronator during slow unopposed pronation

A

pronator quadratus

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27
Q

articulates with capitulum and radial notch of ulna

A

radial head

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28
Q

o of flexor digitorum profundus

A

ant surface of ulna

interosseus membrane

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29
Q

i of flexor digitorum profundus

A

bases of distal phalanges of medial 4 digits

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30
Q

a of flexor digitorum profundus

A

flexes distal phalanges of medial 4 digits

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31
Q

innervation of flexor digitorum profundus

A

medial part - ulnar n. C8T1

lateral part - median n. C8T1

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32
Q

o of flexor pollicis longus

A

anterior surface of radius

interosseus membrane

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33
Q

i of flexor pollicis longus

A

base of distal phalanx of thumb

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34
Q

action of flexor pollicis longus

A

flexes phalanges of thumb

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35
Q

innervation of flexor pollicis longus

A

anterior interosseus n C8-T1 (from median n)

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36
Q

origin of pronator quadratus

A

distal 1/4 of anterior surface of ulna

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37
Q

i of pronator quadratus

A

distal 1/4 of anterior surface of radius

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38
Q

action of pronator quadratus

A

primary pronator of forearm

assist holding radius and ulna together

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39
Q

innervation of pronator quadratus

A

anterior interosseus n. C8T1 (from median n.)

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40
Q

which muscle is responsible for increasing speed and strength of pronation?

A

pronator teres

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41
Q

what is the primary pronator and initiator

A

pronator quadratus

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42
Q

o of brachioradialis

A

proximal 2/3 of lateral supraepiconylar ridge of humerus

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43
Q

i of brachioradialis

A

lateral surface of distal end of radius, proximal to styloid process

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44
Q

action of brachioradialis

A

flexes forearm

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45
Q

innervation of brachioradialis

A

radial n. C5-C7

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46
Q

o of extensor carpi radialis longus

A

lateral supracondylar ridge of humerus

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47
Q

i of extensor carpi radialis longus

A

base of 2nd metacarpal bone

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48
Q

action of extensor carpi radialis longus

A

extend and abduct hand at wrist joint

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49
Q

innervation of extensor carpi radialis longus

A

radial n. C6C7

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50
Q

o of extensor carpi radialis brevis

A

lateral epicondyle of humerus

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51
Q

i of extensor carpi radialis brevis

A

base of 3rd metacarpal bone

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52
Q

action of extensor carpi radialis brevis

A

extend and abduct hand at wrist joint

53
Q

innervation of extensor carpi radialis brevis

A

deep branch of radial n. C7C8

54
Q

o of extensor digitorum

A

lateral epicondyle of humerus

55
Q

i of extensor digitorum

A

extensor expansion of medial 4 digits

56
Q

action of extensor digitorum

A

extends medial 4 digits at MCP PIP DIP.

extends hand at wrist

57
Q

innervation of extensor digitorum

A

posterior interosseus n C7C8 (branch of radial n)

58
Q

o of extensor digiti minimi

A

lateral epicondyle of humerus

59
Q

i of extensor digiti minimi

A

extensor expansion of 5th digit

60
Q

action of extensor digiti minimi

A

extends digit 5 at MCP PIP DIP

61
Q

innervation of extensor digiti minimi

A

posterior interosseus n C7C8

62
Q

o of extensor carpi ulnaris

A

lateral epicondyle of humerus

posterior border of ulna

63
Q

i of extensor carpi ulnaris

A

base of 5th metacarpal

64
Q

a of extensor carpi ulnaris

A

extends wrist and ulnar deviation of the hand at the wrist

65
Q

innervation of extensor carpi ulnaris

A

posterior interosseus n. C7C8

66
Q

o of anconeus

A

lateral epicondyle of humerus

67
Q

i of anconeus

A

lateral surface of olecranon

superior part of posterior surface of ulna

68
Q

action of anconeus

A

assists triceps in extending elbow
stabilizes elbow
abducts ulna during pronation

69
Q

innervation of anconeus

A

radial n C7-T1

70
Q

radial deviation of hand needs what muscles

A

flexor carpi radialis, extensor carpi radials longus and brevis

71
Q

ulnar deviation of hand needs what muscles

A

flexor carpi ulnaris and extensor carpi ulnaris

72
Q

o of supinator

A

lateral epicondyle of humerus
radial collateral and annular ligaments
supinator fossa
crest of ulna

73
Q

i of supinator

A

lateral, posterior and anterior surfaces of proximal 1/3 of radius

74
Q

action of supinator

A

supinates forearm

75
Q

innervation of supinator

A

deep branch of radial n. C7C8

76
Q

o of abductor pollicis longus

A

posterior surfaces of ulna and radius and interosseus membrane

77
Q

i of abductor pollicis longus

A

base of 1st metacarpal

78
Q

action of abductor pollicis longus

A

abducts thumb and extends it at CMC joint

79
Q

innervation of abductor pollicis longus

A

posterior interosseus n C7C8

80
Q

o of extensor pollicis brevis

A

posterior surface of radius and interosseus membrane

81
Q

i of extensor pollicis brevis

A

base of proximal phalanx of thumb via extensor expansion

82
Q

a of extensor pollicis brevis

A

extend thumb: proximal phalanx of thumb at MCP jt

83
Q

innervation of extensor pollicis brevis

A

posterior interosseus C7C8

84
Q

o of extensor pollicis longus

A

posterior surface and middle of ulna and interosseus membrane

85
Q

insertion of extensor pollicis longus

A

base of distal phalanx of thumb via extensor expansion

86
Q

a of extensor pollicis longus

A

extends distal phalanx of thumb at IP and MCP jt

87
Q

innervation of extensor pollicis longus

A

posterior interosseus n C7C8

88
Q

o of extensor indicis

A

posterior surface of ulna and interosseus membrane

89
Q

i of extesnsor indicis

A

extensor expansion of 2nd digit

90
Q

a of extensor indicis

A

extends index finger independently

assists in wrist extension

91
Q

innervation of extensor indicis

A

posterior interosseus n C7C8

92
Q

primary mover of supination in non-forceful situation

A

supinator

93
Q

what assists the supinator in strong, forceful movements (using a screwdriver)

A

biceps brachii

94
Q

which of the forearm bones has a stronger articulation with the humerus

A

ulna

95
Q

what 3 structures of ulna make the strong hinge-type jt

A

olecranon, coronoid process, and trochlear notch

96
Q

the radius articulates with the ______ proximally, and is only anchored by the _______ _____ surrounding the head of the radius

A

capitulum

annular ring

97
Q

what 2 bones in the hand does the radius articulate with

A

lunate and scaphoid

98
Q

the styloid process of the _____ extends more distally than the styloid process of the _____

A

radius

ulna

99
Q

fracture of the styloid process of the radius and displacement of it proximally

A

colles fracture

100
Q

in a colles fracture how do you tell

A

styloid processes at same lvl. may also damage scaphoid bone

101
Q

which two fingers may hurt or tingle when the ulnar n is hit (funny bone)

A

medial 2

102
Q

primary n for the muscles of the anterior compartment of the forearm

A

median n

103
Q

median n innervates all the muscles in the flexor compartment except

A

brachioradialis, flexor carpi ulnaris, medial part of flexor digitorum profundus

104
Q

this muscle is a flexor of the forearm at the elbow, but is usually listed as occupying the posterior compartment of the forearm due to its origin near the common origin of the extensors of the forearm

A

brachioradialis

105
Q

named muscular branch of the median n arising near the apex of the cubital fossa. courses along the anterior surface of the interosseus membrane to innervate the digit 2,3 of flexor digitorum profundus, flexor pollicis longus and pronator quadratus

A

anterior interosseus n

106
Q

nerve posterior to medial epicondyle of humerus, deep to flexor carpi ulnaris along flexor digitorum profundus, medial to ulnar a.

A

ulnar n

107
Q

muscular branches to flexor carpi ulnaris and flexor digitorum profundus

A

ulnar n

108
Q

innervates medial 1/2 of palmar surface of hand (little and ring finger)

A

palmar cutaneous branch of ulnar n.

109
Q

innervates medial 1/2 of dorsal surface of hand (little and ring finger)

A

dorsal cutaneous branch of ulnar n.

110
Q

enters forearm on anterior side of lateral epicondyle between brachialis and brachioradialis. branches into superficial and deep branch

A

radial n

111
Q

what is the superficial branch of the radial n.

A

entirely cutaneus-skin of dorsum of wrist, hand, thumb, and dorsum of digits 2,3

112
Q

sweeps around lateral side of radius to extensor compartment

A

deep branch of radial n

113
Q

innervates supinator and extensor carpi radialis brevis

A

deep branch of ulnar n.

114
Q

innervates the muscles of the deep extensor compartment

A

posterior interosseus n.

115
Q

travels with posterior interosseus a, a branch of the ulnar artery

A

posterior interosseus n. branch of radial n.

116
Q

where does the brachial artery divide into the radial and ulnar branches?

A

cubital fossa

117
Q

direct line continuation of brachial artery

A

radial a.

118
Q

the radial a extends distally in the _____ compartment to the _____ and then swings dorsally through the _____

A

anterior
styloid process of radius
anatomical snuff box

119
Q

the ulnar a sweeps ______ after branching from the brachial a

A

medially

120
Q

lies on the flexor digitorum profundus, lateral to ulnar n.

A

ulnar a

121
Q

what does ulnar a supply

A

medial muscles of hand and forearm, common flexor synovial sheaths and ulnar n.

122
Q

ulnar a turns into ________ that divides into anterior and posterior interosseus aa.

A

common interosseus a

123
Q

passes distally and then pierces interosseus membrane to join carpal aa

A

anterior interosseus a

124
Q

passes through the interosseus membrane to reach the extensor compartment of forearm

A

posterior interosseus a.

125
Q

anatomical snuff box make up

A

bounded by the tendons of abductor pollicis longus and extensor pollicis brevis anteriorly
the tendon of extensor pollicis longus posteriorly

126
Q

the ____ a passes deep in the anatomical snuff box as it travels from the anterior compartment to the post

A

radial

127
Q

flexor retinaclm closing over the carpal groove or sulcus

A

carpal tunnel

128
Q

which muscle is encased in Y shaped attachment of flexor retinaculum to the scaphoid and trapezium carpal bones and does not lie in the carpal tunnel

A

flexor carpi radialis

129
Q

space occupying lesions in the carpal tunnel will result in compression of ____ and difficult in _____

A

median n.

flexion

DPT Anatomy Test 3 (4 decks)

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