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Gross Exam 2 > Muscles > Flashcards

Muscles Flashcards

1
Q

trapezius- descending

insertion

A

lateral 1/3 of clavicle

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2
Q

trapezius- descending

innervation

A

accessory n. CN XI

C3-C4 of cervical plexus

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3
Q

trapezius- descending

action

A

elevates scapula

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4
Q

trapezius- transverse

origin

A

aponeurosis at T1-T4 spinous processes

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5
Q

trapezius- transverse

insertion

A

acromion

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6
Q

trapezius- transverse

innervation

A

accessory n. C XI

C3-C4 pf cervical plexus

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7
Q

trapezius- transverse

action

A

retracts scapula

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8
Q

trapezius- ascending

origin

A

spinous processes of T5-T12

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9
Q

trapezius- ascending

insertion

A

scapular spine

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10
Q

trapezius- ascending

innervation

A

accessory n. CN XI

C3-C4 of cervical plexus

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11
Q

trapezius- ascending

action

A

depresses scapula

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12
Q

rhomboid minor

origin

A

spinous processes of C6, C7

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13
Q

rhomboid minor

insertion

A

medial border of scapula above scapular spine

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14
Q

rhomboid minor

innervation

A

dorsal scapular nerve

C4-C5

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15
Q

rhomboid minor

action

A

steadies scapula

elevates scapula

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16
Q

rhomboid major

origin

A

spinous processes of T1-T4 vertebrae

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17
Q

rhomboid major

insertion

A

medial border of scapula below scapular spine

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18
Q

rhomboid major

innervation

A

dorsal scapular nerve

C4-C5

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19
Q

rhomboid major

action

A

steadies scapula

elevates scapula

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20
Q

levator scapulae

origin

A

transverse processes of C1-C4 vertebrae

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21
Q

levator scapulae

insertion

A

superior angle of scapula

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22
Q

levator scapulae

innervation

A

dorsal scapular nerve

C4-C5

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23
Q

levator scapulae

action

A

draws scapula medially upward while moving inferior angle medially,
ipsilateral flexion

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24
Q

supraspinatus

origin

A

supraspinous fossa

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25
Q

supraspinatus

insertion

A

superior facet of greater tubercle of humerus

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26
Q

supraspinatus

innervation

A

suprascapular nerve

C4-C6

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27
Q

supraspinatus

action

A

initiates abduction to first 15 degrees

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28
Q

infraspinatus

origin

A

infraspinous fossa

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29
Q

infraspinatus

insertion

A

middle facet of greater tubercle of humerus

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30
Q

infraspinatus

innervation

A

suprascapular nerve

C4-C6

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31
Q

infraspinatus

action

A

external rotation

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32
Q

teres minor

origin

A

lateral border of scapula

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33
Q

teres minor

insertion

A

inferior facet of greater tubercle of humerus

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34
Q

teres minor

innervation

A

axillary nerve

C5, C6

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35
Q

teres minor

action

A

external rotation

weak adduction

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36
Q

subscapularis

origin

A

subscapular fossa

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37
Q

subscapularis

insertion

A

lesser tubercle of humerus

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38
Q

subscapularis

innervation

A

subscapular nerve

C5, C6

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39
Q

subscapularis

action

A

internal rotation

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40
Q

Trapezius- descending

Origin

A

Occipital bone

Spinous process of C1-C7

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41
Q

teres major

origin

A

inferior angle of scapula

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42
Q

teres major

insertion

A

crest of lesser tubercle of humerus

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43
Q

teres major

innervation

A

lower subscapular nerve

C5-C7

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44
Q

teres major

action

A

internal rotation
adduction
extension

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45
Q

deltoid- anterior/clavicular

origin

A

lateral 1/3 of clavicle

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46
Q

deltoid- anterior/clavicular

insertion

A

deltoid tuberosity of humerus

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47
Q

deltoid- anterior/clavicular

innervation

A

axillary nerve

C5, C6

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48
Q

deltoid- anterior/clavicular

action

A

flexion!!
internal rotation
adduction

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49
Q

deltoid- middle/acromial

origin

A

lateral 1/3 of clavicle

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50
Q

deltoid- middle/acromial

insertion

A

deltoid tuberosity of humerus

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51
Q

deltoid- middle/acromial

innervation

A

axillary nerve

C5, C6

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52
Q

deltoid- middle/acromial

action

A

abduction

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53
Q

deltoid- posterior/scapular

origin

A

scapular spine

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54
Q

deltoid- posterior/scapular

insertion

A

deltoid tuberosity of humerus

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55
Q

deltoid- posterior/scapular

innervation

A

axillary nerve

C5, C6

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56
Q

deltoid- posterior/scapular

action

A

extension!!
external rotaiton
adduction

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57
Q

latissimus dorsi

origin

A

spinous processes T7-T12, thoracolumbar fascia
inferior angle of scapula
9th - 12th ribs
posterior 1/3 of iliac crest

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58
Q

latissimus dorsi

insertion

A

floor of intertubercular sulcus of humerus

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59
Q

latissimus dorsi

innervation

A

thoracodorsal nerve

C6-C8

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60
Q

latissimus dorsi

action

A

internal rotation,
adduction,
extension

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61
Q

pectoralis major

origin

A

medial 1/2 of clavicle
sternum and costal cartilages 1-6
anterior layer of rectus sheath

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62
Q

pectoralis major

insertion

A

crest of greater tubercle of humerus

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63
Q

pectoralis major

innervation

A

medial and lateral pectoral nerves

C5-T1

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64
Q

pectoralis major

action

A

clavicular and sternocostal: flexion

entire muscle: adduction, internal rotation

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65
Q

pectoralis minor

origin

A

3rd to 5th ribs

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66
Q

pectoralis minor

insertion

A

coracoid process

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67
Q

pectoralis minor

innervation

A

medial pectoral nerve

C8, T1

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68
Q

pectoralis minor

action

A

protraction
anterior tilt
depresses shoulder when elevated

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69
Q

serratus anterior

origin

A

1st to 9th ribs

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70
Q

serratus anterior

insertion

A

medial border of scapula

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71
Q

serratus anterior

innervation

A

long thoracic nerve

C5-C7

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72
Q

serratus anterior

action

A

Superior part: lowers the raised arm
Inferior part: rotates scapula laterally
Entire muscle: draws scapula laterally forward
elevates ribs when shoulder is fixed

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73
Q

coracobrachialis

origin

A

coracoid process of scapula

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74
Q

coracobrachialis

insertion

A

in line with crest of lesser tubercle of humerus

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75
Q

coracobrachialis

innervation

A

musculocutaneous nerve

C5-C7

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76
Q

coracobrachialis

action

A

flexion
adduction
internal rotation

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77
Q

subclavius

origin

A

1st rib

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78
Q

subclavius

insertion

A

inferior surface of clavicle

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79
Q

subclavius

innervation

A

Nerve to subclavius

C5, C6

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80
Q

subclavius

action

A

steadies the clavicle in sternoclavicular joint

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81
Q

anterior scalene

origin

A

C3-C6 anterior tubercle of transverse processes

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82
Q

anterior scalene

insertion

A

1st rib scalene tubercle

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83
Q

anterior scalene

innervation

A

direct branches from cervical and brachial plexuses

C3-C8

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84
Q

anterior scalene

action

A

Mobile ribs: elevates upper ribs during forced inspiration

Fixed ribs:
Unilateral- bends cervical spine to same side
Bilateral- flexes neck

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85
Q

middle scalene

origin

A

C3-C7 posterior tubercles of transverse processes

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86
Q

middle scalene

insertion

A

1st rib posterior to groover for subclavian artery

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87
Q

middle scalene

innervation

A

direct branches from cervical and brachial plexuses

C3-C8

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88
Q

middle scalene

action

A

Mobile ribs: elevates upper ribs during forced inspiration

Fixed ribs:
Unilateral- bends cervical spine to same side
Bilateral- flexes neck

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89
Q

posterior scalene

origin

A

C5-C7 posterior tubercles of transverse processes

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90
Q

posterior scalene

insertion

A

2nd rib outer surface

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91
Q

posterior scalene

innervation

A

direct branches from cervical and brachial plexuses

C3-C8

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92
Q

posterior scalene

action

A

Mobile ribs: elevates upper ribs during forced inspiration

Fixed ribs:
Unilateral- bends cervical spine to same side
Bilateral- flexes neck

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93
Q

inferior belly of omohyoid

origin

A

superior border of scapula

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94
Q

inferior belly of omohyoid

insertion

A

body of hyoid bone

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95
Q

inferior belly of omohyoid

innervation

A

ansa cervicalis of cervical plexus C1-C3

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96
Q

inferior belly of omohyoid

action

A

depresses hyoid

draws larynx and hyoid down for phonation and terminal phases during swallowing

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97
Q

biceps brachii- long head

origin

A

supraglenoid tubercle of scapula

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98
Q

biceps brachii- long head

insertion

A

radial tuberosity

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99
Q

biceps brachii- long head

innervation

A

musculocutaneous nerve

C5-C6

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100
Q

biceps brachii- long head

action

A

Elbow joint: flexion, supination

Shoulder joint: flexion, abduction and internal rotation of humerus, stabilizes humeral head during deltoid contraction

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101
Q

biceps brachii- short head

origin

A

coracoid process of scapula

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102
Q

biceps brachii- short head

insertion

A

radial tuberosity

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103
Q

biceps brachii- short head

innervation

A

musculocutaneous nerve

C5-C6

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104
Q

biceps brachii- short head

action

A

Elbow joint: flexion, supination

Shoulder joint: flexion, abduction and internal rotation of humerus, stabilizes humeral head during deltoid contraction

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105
Q

brachialis

origin

A

distal 1/2 of anterior surface of humerus

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106
Q

brachialis

insertion

A

ulnar tuberosity

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107
Q

brachialis

innervation

A

musculocutaneous nerve
C5-C6

radial nerve
C7

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108
Q

brachialis

action

A

flexion at elbow joint

109
Q

triceps brachii- long head

origin

A

infraglenoid tubercle of scapula

110
Q

triceps brachii- long head

insertion

A

olecranon of ulna

111
Q

triceps brachii- long head

innervation

A

radial nerve C6-C8

112
Q

triceps brachii- long head

action

A

shoulder joint: extension, adduction

elbow joint: extension

113
Q

triceps brachii- medial head

origin

A

posterior humerus, inferior to radial groove

medial intermuscular septum

114
Q

triceps brachii- medial head

insertion

A

olecranon of ulna

115
Q

triceps brachii- medial head

innervation

A

radial nerve

C6-C8

116
Q

triceps brachii- medial head

action

A

extension at elbow joint

117
Q

triceps brachii- lateral head

origin

A

posterior humerus, proximal to radial groove

lateral intermuscular septum

118
Q

triceps brachii- lateral head

insertion

A

olecranon of ulna

119
Q

triceps brachii- lateral head

innervation

A

radial nerve

C6-C8

120
Q

triceps brachii- lateral head

action

A

extension at elbow joint

121
Q

pronator teres

origin

A

medial epicondyle of humerus

coronoid process of ulna

122
Q

pronator teres

insertion

A

lateral radius- distal to supinator insertion

123
Q

pronator teres

innervation

A

median nerve

C6, C7

124
Q

pronator teres

action

A

Elbow: weak flexor

Forearm pronation

125
Q

flexor carpi radialis

origin

A

medial epicondyle of humerus

126
Q

flexor carpi radialis

insertion

A

base of 2nd mc

127
Q

flexor carpi radialis

innervation

A

median nerve

C6, C7

128
Q

flexor carpi radialis

action

A

Wrist: flexion, abduction (radial deviation) of hand

129
Q

palmaris longus

origin

A

medial epicondyle of humerus

130
Q

palmaris longus

insertion

A

palmar aponeurosis

131
Q

palmaris longus

innervation

A

median nerve

C7, C8

132
Q

palmaris longus

action

A

Elbow: weak flexion
Wrist: flexion tightens palmar aponeurosis

133
Q

flexor carpi ulnaris

origin

A

medial epicondyle of humerus

olecranon of ulna

134
Q

flexor carpi ulnaris

insertion

A

pisiform
hook of hamate
base of 5th metacarpal

135
Q

flexor carpi ulnaris

innervation

A

ulnar nerve

C7-T1

136
Q

flexor carpi ulnaris

action

A

Wrist: flexion and adduction (ulnar deviation of hand)

137
Q

flexor digitorum superficialis

origin

A

medial epicondyle

upper 1/2 of anterior border of radius

138
Q

flexor digitorum superficialis

insertion

A

sides of middle phalanges of 2nd to 5th digits

139
Q

flexor digitorum superficialis

innervation

A

median nerve

C8, T1

140
Q

flexor digitorum superficialis

action

A

Elbow: weak flexor

Wrist, MCP, and PIP joints of 2nd to 5th digits: flexion

141
Q

flexor digitorum profundus

origin

A

Proximal 2/3 of flexor surface of ulna

Interosseous membrane

142
Q

flexor digitorum profundus

insertion

A

distal phalanges of 2nd to 5th digits

143
Q

flexor digitorum profundus

innervation

A

Anterior interosseous branch of Median nerve
C8,T1

Ulnar nerve
C8, T1

144
Q

flexor digitorum profundus

action

A

Wrist, MCP, and PIP, DIP joints of 2nd to 5th digits: flexion

145
Q

flexor pollicis longus

origin

A

Midanterior surface of radius

Adjacent interosseous membrane

146
Q

flexor pollicis longus

insertion

A

Distal phalanx of thumb- palmar surface

147
Q

flexor pollicis longus

innervation

A

Anterior interosseous branch of Median n.

C8,T1

148
Q

flexor pollicis longus

action

A

Wrist: flexion and abduction (radial deviation) of hand

CMC, MCP and IP of thumb: flexion

149
Q

pronator quadratus

origin

A

Distal quarter of ulna- anterior surface

150
Q

pronator quadratus

insertion

A

Distal quarter of radius- anterior surface

151
Q

pronator quadratus

innervation

A

Anterior interosseous branch of Median n.

C8,T1

152
Q

pronator quadratus

action

A

Hand: pronation

Distal radioulnar joint: stabilization

153
Q

brachioradialis

origin

A

Distal surface of distal humerus

lateral intermuscular septum

154
Q

brachioradialis

insertion

A

styloid process of ulna

155
Q

brachioradialis

innervation

A

radial n.

C5, C6

156
Q

brachioradialis

action

A

Elbow flexion,

Forearm semipronation

157
Q

2] extensor carpi radialis longus

origin

A

Lateral supracondylar ridge of distal humerus,

Lateral intermuscular septum

158
Q

2] extensor carpi radialis longus

insertion

A

2nd mc base

159
Q

2] extensor carpi radialis longus

innervation

A

radial n.

C6, C7

160
Q

2] extensor carpi radialis longus

action

A

Elbow: weak flexion,

Wrist extension and abduction

161
Q

2] extensor carpi radialis brevis

origin

A

lateral epicondyle of humerus

162
Q

2] extensor carpi radialis brevis

insertion

A

3rd mc base

163
Q

2] extensor carpi radialis brevis

innervation

A

radial n.

C7, C8

164
Q

2] extensor carpi radialis brevis

action

A

Elbow: weak flexion,

Wrist extension and abduction

165
Q

4] extensor digitorum

origin

A

lateral epicondyle of humerus

166
Q

4] extensor digitorum

insertion

A

dde of 2nd to 5th digits

167
Q

4] extensor digitorum

innervation

A

Posterior interosseous nerve (of radial n.)

C7, C8

168
Q

4] extensor digitorum

action

A

Wrist: extension

MCP, PIP, and DIP of 2nd to 5th digits: extension, abduction of fingers

169
Q

5] extensor digiti minimi

origin

A

lateral epicondyle of humerus

170
Q

5] extensor digiti minimi

insertion

A

dde of 5th digit

171
Q

5] extensor digiti minimi

innervation

A

Posterior interosseous nerve (of radial n.)

C7, C8

172
Q

5] extensor digiti minimi

action

A

Wrist: extension, ulnar abduction of hand

MCP, PIP, and DIP of 5th digit: extension and abduction of 5th digit

173
Q

6] extensor carpi ulnaris

origin

A

lateral epicondyle of humerus

dorsal surface of ulnar head

174
Q

6] extensor carpi ulnaris

insertion

A

base of 5th mc

175
Q

6] extensor carpi ulnaris

innervation

A

Posterior interosseous nerve (of radial n.)

C7, C8

176
Q

6] extensor carpi ulnaris

action

A

Wrist: extension, adduction (ulnar deviation) of hand

177
Q

supinator

origin

A

Olecranon,
Lateral epicondyle of humerus,
Radial collateral lig.,
Annular lig. of radius

178
Q

supinator

insertion

A

Radius- b/w radial tuberosity and insertion of pronator teres

179
Q

supinator

innervation

A

posterior interosseous n. of radial n.

C6, C7

180
Q

supinator

action

A

radioulnar joints: supination

181
Q

1] abductor pollicis longus

origin

A

Radius and ulna- dorsal surfaces, interosseous membrane

182
Q

1] abductor pollicis longus

insertion

A

base of 1st mc

183
Q

1] abductor pollicis longus

innervation

A

posterior interosseous n. of radial n.

C7, C8

184
Q

1] abductor pollicis longus

action

A

Radiocarpal joint: abduction of the hand

CMC and MCP of thumb: extension

185
Q

1] extensor pollicis brevis

origin

A

Posterior surface of radius,

Interosseous mebrane

186
Q

1] extensor pollicis brevis

insertion

A

base of pp of thumb

187
Q

1] extensor pollicis brevis

innervation

A

Posterior interosseous n. of radial n.

C7,C8

188
Q

1] extensor pollicis brevis

action

A

Radiocarpal joint: abduction (radial deviation) of hand

CMC joint and MCP of thumb: extension

189
Q

3] extensor pollicis longus

origin

A

Posterior surface of ulna,

Interosseous membrane

190
Q

3] extensor pollicis longus

insertion

A

Base of distal phalanx of thumb

191
Q

3] extensor pollicis longus

innervation

A

posterior interosseous n. of radial n.

C7,C8

192
Q

3] extensor pollicis longus

action

A

Wrist: extension and abduction (radial deviation) of hand
CMC of thumb: adduction
MCP and IP of thumb: extension

193
Q

4] extensor indicis

origin

A

Posterior surface of ulna,

Interosseous membrane

194
Q

4] extensor indicis

insertion

A

Posterior digital extension of 2nd digit

195
Q

4] extensor indicis

innervation

A

posterior interosseous n. of radial n.

C7, C8

196
Q

4] extensor indicis

action

A

Wrist: extension

MCP, PIP, and DIP of 2nd digit: extension

197
Q

adductor pollicis

origin

A

Transverse head: 3rd mc (palmar surface)

Oblique head: capitate bone, 2nd and 3rd mc bases

198
Q

adductor pollicis

insertion

A

base of pp on thumb via the ulnar sesamoid

199
Q

adductor pollicis

innervation

A

ulnar n.

200
Q

adductor pollicis

action

A

CMC joint of thumb: adduction

MCP joint of thumb: flexion

201
Q

abductor pollicis brevis

origin

A

Scaphoid
trapezium
Flexor retinaculum

202
Q

abductor pollicis brevis

insertion

A

base of pp of thumb- via radial sesamoid

203
Q

abductor pollicis brevis

innervation

A

recurrent branch of median n.

204
Q

abductor pollicis brevis

action

A

CMC joint of thumb: abduction

205
Q

flexor pollicis brevis

origin

A

Superficial head: flexor retinaculum

Deep head: capitate bone, trapezium

206
Q

flexor pollicis brevis

insertion

A

Base of proximal phalanx of thumb- via the radial sesamoid

207
Q

flexor pollicis brevis

innervation

A

Superficial head: recurrent branch of median n.

Deep head: ulnar n.

208
Q

flexor pollicis brevis

action

A

CMC joint of thumb: flexion

209
Q

opponens pollicis

origin

A

trapezium

210
Q

opponens pollicis

insertion

A

radial border of 1st mc

211
Q

opponens pollicis

innervation

A

recurrent branch of median n.

212
Q

opponens pollicis

action

A

CMC joint of thumb: opposition

213
Q

opponens digiti minimi

origin

A

hook of hamate

flexor retinaculum

214
Q

opponens digiti minimi

insertion

A

ulnar border of 5th mc

215
Q

opponens digiti minimi

innervation

A

ulnar n.

C8, T1

216
Q

opponens digiti minimi

action

A

Draws mc in palmar direction

opposition

217
Q

flexor digiti minimi brevis

origin

A

hook of hamate

flexor retinaculum

218
Q

flexor digiti minimi brevis

insertion

A

base of 5th pp

219
Q

flexor digiti minimi

innervation

A

ulnar n.

C8, T1

220
Q

flexor digiti minimi brevis

action

A

MCP joint of little finger: flexion

221
Q

abductor digiti minimi

origin

A

pisiform

222
Q

abductor digiti minimi

insertion

A

Ulnar base of 5th pp

dde of 5th digit

223
Q

abductor digiti minimi

innervation

A

ulnar n.

C8, T1

224
Q

abductor digiti minimi

action

A

MCP joint of little finger: flexion and abduction

PIP and DIP joints of little finger: extension

225
Q

1st lumbricals

origin

A

Tendons of flexor digitorum profundus (radial sides)

226
Q

1st lumbricals

insertion

A

2nd digit dde

227
Q

1st lumbricals

innervation

A

median n.

C8, T1

228
Q

1st lumbricals

action

A

2nd to 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension
229
Q

2nd lumbricals

origin

A

tendons of flexor digitorum profundus (radial sides)

230
Q

2nd lumbricals

insertion

A

3rd digit dde

231
Q

2nd lumbricals

innervation

A

median n.

C8, T1

232
Q

2nd lumbricals

innervation

A

2nd to 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension
233
Q

3rd lumbricals

origin

A

Tendons of flexor digitorum profundus (bipennate from medial and lateral sides)

234
Q

3rd lumbricals

insertion

A

4th digit dde

235
Q

3rd lumbricals

innervation

A

deep ulnar n.

C8, T1

236
Q

3rd lumbricals

action

A

2nd to 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension
237
Q

4th lumbricals

origin

A

Tendons of flexor digitorum profundus (bipennate from medial and lateral sides)

238
Q

4th lumbricals

insertion

A

5th digit dde

239
Q

4th lumbricals

innervation

A

deep ulnar n.

C8, T1

240
Q

4th lumbricals

action

A

2nd to 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension
241
Q

1st dorsal interossei

origin

A

1st and 2nd mc

242
Q

1st dorsal interossei

insertion

A

2nd digit dde

2nd digit pp radial side

243
Q

1st dorsal interossei

innervation

A

deep ulnar n.

C8, T1

244
Q

1st dorsal interossei

action

A

2nd to 4th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and abduction from 3rd digit
245
Q

2nd dorsal interossei

origin

A

2nd and 3rd mc

246
Q

2nd dorsal interossei

insertion

A

3rd digit dde

3rd digit pp radial side

247
Q

2nd dorsal interossei

innervation

A

deep ulnar n.

C8, T1

248
Q

2nd dorsal interossei

action

A

2nd to 4th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and abduction from 3rd digit
249
Q

3rd dorsal interossei

origin

A

3rd and 4th mc

250
Q

3rd dorsal interossei

insertion

A

3rd digit dde

3rd digit pp ulnar side

251
Q

3rd dorsal interossei

innervation

A

deep ulnar n.

C8, T1

252
Q

3rd dorsal interossei

action

A

2nd to 4th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and abduction from 3rd digit
253
Q

4th dorsal interossei

origin

A

4th and 5th mc

254
Q

4th dorsal interossei

insertion

A

4th digit dde

4th pp ulnar side

255
Q

4th dorsal interossei

innervation

A

deep ulnar n.

C8, T1

256
Q

4th dorsal interossei

action

A

2nd to 4th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and abduction from 3rd digit
257
Q

1st palmar interossei

origin

A

ulnar side of 2nd mc

258
Q

1st palmar interossei

insertion

A

2nd digit dde

2nd pp base

259
Q

1st palmar interossei

innervation

A

deep ulnar n.

C8, T1

260
Q

1st palmar interossei

action

A

2nd, 4th, and 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and adduction toward 3rd digit
261
Q

2nd palmar interossei

origin

A

radial side of 4th mc

262
Q

2nd palmar interossei

insertion

A

4th digit dde

4th pp base

263
Q

2nd palmar interossei

innervation

A

deep ulnar n.

C8, T1

264
Q

2nd palmar interossei

action

A

2nd, 4th, and 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and adduction toward 3rd digit
265
Q

3rd palmar interossei

origin

A

radial side of 5th mc

266
Q

3rd palmar interossei

insertion

A

5th digit dde

5th pp base

267
Q

3rd palmar interossei

innervation

A

deep ulnar n.

C8, T1

268
Q

3rd palmar interossei

action

A

2nd, 4th, and 5th digits:

  • MCP joints: flexion
  • proximal and distal IP joints: extension and adduction toward 3rd digit

Gross Exam 2 (1 decks)

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