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Anatomy > Upper Extremity > Flashcards

Upper Extremity Flashcards

1
Q

Pectoralis Major (clavicular fibers) ORIGIN

A

Anterior surface of sternal 1/2 of clavicle

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2
Q

Pectoralis Major (clavicular fibers) INSERTION

A

Crest of greater tubercle of humerus

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3
Q

Pectoralis Major (clavicular fibers) ACTION

A

Shoulder flexion, MR and horizontal adduction

Origin fixed: humeral adduction and MR

Insertion fixed: assists in elevation of thorax in forced inspiration

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4
Q

Pectoralis Major (clavicular fibers) NERVE

A

Lateral pectoral n. (C5,6,7)

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5
Q

Pectoralis Major (sternal fibers) ORIGIN

A

Anterior surface of sternum, cartilages of ribs 1-7, and aponeurosis of external obliques

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6
Q

Pectoralis Major (sternal fibers) INSERTION

A

Crest of greater tubercle of humerus

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7
Q

Pectoralis Major (sternal fibers) ACTION

A

Depress shoulder
Oblique adduction of humerus toward opposite iliac crest

Origin fixed: humeral adduction and MR

Insertion fixed: assists in elevation of thorax in forced inspiration

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8
Q

Pectoralis Major (sternal fibers) NERVE

A

Lateral and Medial Pectoral n. (C6,7,8,T1)

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9
Q

Pectoralis Minor ORIGIN

A

Superior margins, outer surfaces of 3rd, 4th, and 5th ribs near the cartilages; and from fascia over corresponding intercostals muscles

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10
Q

Pectoralis Minor INSERTION

A

Medial border, superior surface of coracoid process of scapula

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11
Q

Pectoralis Minor ACTION

A

Downward rotation and medial rotation of scapula
Prevents upward rotation of scapula

Origin fixed:
Tilts scapula anteriorly

Insertion fixed:
Assist in forced inspiration

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12
Q

Pectoralis Minor NERVE

A

Medial Pectoral n. (C6,7,8,T1)

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13
Q

Subclavious ORIGIN

A

1st rib and cartilage

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14
Q

Subclavious INSERTION

A

Undersurface of the clavicle

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15
Q

Subclavious ACTION

A

Draws the clavicle down and stabilizes joint

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16
Q

Subclavious NERVE

A

Subclavian n. (C5,C6)

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17
Q

Latissimus Dorsi ORIGIN

A

Spinous processes of last 6 thoracic vertebra
Last 3 or 4 ribs
Through the thoracolumbar fascia from the lumbar and sacral vertebrae
Posterior 1/3 of external lip of iliac crest
Slip from the inferior angle of the scapula

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18
Q

Latissimus Dorsi INSERTION

A

Intertubercular groove of humerus

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19
Q

Latissimus Dorsi ACTION

A 
Origin fixed: 
Shoulder MR, add,
and extension
Depresses shoulder girdle
Assists in trunk lateral flexion

Insertion fixed:
Assists in anterior and lateral pelvic tilts
Assists in lumbar hyperextension

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20
Q

Latissimus Dorsi NERVE

A

Thoracodorsal n. (C6,7,8)

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21
Q

Teres Major ORIGIN

A

Dorsal surface of inferior angle and

lower third of lateral border of scapula

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22
Q

Teres Major INSERTION

A

Crest of lesser tubercle of humerus

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23
Q

Teres Major ACTION

A

Shoulder MR, add, ext

Scapular internal rotation

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24
Q

Teres Major NERVE

A

Lower Subscapular n. (C5,6,7)

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25
Q

Serratus Anterior ORIGIN

A

Outer surface and superior borders of upper 8 or 9 ribs

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26
Q

Serratus Anterior INSERTION

A

Costal surface of medial border of scapula

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27
Q

Serratus Anterior ACTION

A

Origin fixed:
Abduction, posterior tilt, external rotation, and upward rotation of scapula.
Holds medial border of scapula against thorax.
Lower fibers may depress the
scapula and upper fibers may
elevate.

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28
Q

Serratus Anterior NERVE

A

Long Thoracic n. (C5,6,7,8)

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29
Q

Supraspinatus ORIGIN

A

Medial 2/3 of supraspinous fossa of scapula

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30
Q

Supraspinatus INSERTION

A

Superior facet of greater tubercule of humerus, and shoulder joint capsule

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31
Q

Supraspinatus ACTION

A

Abduct shoulder
Stabilizes head of humerus in glenoid cavity during movements
May assist with shoulder LR from neutral to full LR

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32
Q

Supraspinatus NERVE

A

Suprascapular n. (C4,5,6)

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33
Q

Infraspinatus ORIGIN

A

Medial 2/3 of infraspinous fossa of scapula

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34
Q

Infraspinatus INSERTION

A

Middle facet of greater tubercle of humerus, shoulder joint capusle

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35
Q

Infraspinatus ACTION

A

LR shoulder
Stabilizes head of humerus in glenoid cavity during movements
Scapular internal rotation

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36
Q

Infraspinatus NERVE

A

Suprascapular n. (C4,5,6)

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37
Q

Subscapularis ORIGIN

A

Subscapular fossa of scapula

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38
Q

Subscapularis INSERTION

A

Lesser tubercle of humerus and shoulder joint capsule

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39
Q

Subscapularis ACTION

A

MR shoulder
Stabilizes head of humerus in glenoid cavity during movements.
Prevents humeral anterior glide.

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40
Q

Subscapularis NERVE

A

Upper and Lower Subscapular n. (C5,6,7)

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41
Q

Deltoid ORIGIN

A

ANTERIOR:
Anterior border, superior surface of acromion, and lateral 1/3 of clavicle

MIDDLE
Lateral margin and superior surface of acromion

POSTERIOR
Inferior lip of posterior border of spine of scapula

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42
Q

Deltoid INSERTION

A

Deltoid tuberosity

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43
Q

Deltoid ACTION

A

ABD shoulder

Anterior:
Shoulder flexion and MR

Middle:
shoulder abduction; scapular downward rotation

Posterior:
Shoulder extension and LR
Scapular internal rotation

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44
Q

Deltoid NERVE

A

Axillary n. (C5,6)

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45
Q

Upper Trapezius ORIGIN

A

External occipital protuberance, medial 1/3 of superior nuchal line, ligamentum nuchae, and spinous process of C7 vertebra

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46
Q

Upper Trapezius INSERTION

A

Lateral 1/3 of clavicle and acromion process of scapula

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47
Q

Upper Trapezius ACTION

A

Origin fixed:
Stabilization of scapula

Insertion fixed and acting unilaterally:
Extend, laterally flex, and rotate head and cervical vertebrae so face turns to opposite side

Acting bilaterally: 
Extends neck
Elevation of scapula
Elevation and adduction of the scapula and clavicle
Accessory muscle to respiration
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48
Q

Upper Trapezius NERVE

A

Spinal Accessory n. (CN XI)

Anterior Primary rami (C2,3,4)

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49
Q

Middle Trapezius ORIGIN

A

Spinous process of T1-5

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50
Q

Middle Trapezius INSERTION

A

Medial margin of acromion process and superior lip of spine of scapula

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51
Q

Middle Trapezius ACTION

A

Adduction (with stabilization by upper and lower fibers), ER, and upward rotation of scapula.
Stabilizes scapula during upward rotation

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52
Q

Middle Trapezius NERVE

A

Spinal Accessory n. (CN XI)

Anterior primary rami (C2,3,4)

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53
Q

Lower Trapezius ORIGIN

A

Spinous process of T6-12

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54
Q

Lower Trapezius INSERTION

A

Tubercle of at apex of spine of scapula

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55
Q

Lower Trapezius ACTION

A

Depression, ER, and upward rotation of the scapula.

Best upward rotator of scapula in early range of arm elevation

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56
Q

Lower Trapezius NERVE

A

Spinal Accessory n. (CN XI)

Anterior primary rami (C2,3,4)

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57
Q

Levator scapulae ORIGIN

A

Transverse process of cervical vertebrae 1-4

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58
Q

Levator scapulae INSERTION

A

Medial border of scapula between superior angle and root of spine

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59
Q

Levator scapulae ACTION

A

Origin fixed:
Elevation and downward rotation of the scapula

Insertion fixed and acting unilaterally:
Laterally flexes and rotates cervical vertebrae to SAME side

Acting bilaterally:
Assist in cervical extension

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60
Q

Levator scapulae NERVE

A

Dorsal Scapular n. (C4,5,)

Cervical Spinal n. (C3,4)

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61
Q

Rhomboideus Major ORIGIN

A

Spinous processes of T2-T5

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62
Q

Rhomboideus Major INSERTION

A

By fibrous attachment to medial border of scapula between spine and inferior angle

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63
Q

Rhomboideus Major ACTION

A

Adduction, elevation, downward rotation and ER of the scapula

(Stiffness helps prevent scapular internal rotation)

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64
Q

Rhomboideus Major NERVE

A

Dorsal Scapular n. (C4,5)

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65
Q

Rhomboideus Minor ORIGIN

A

Ligamentum nuchae, spinous processes of C7-T1 vertebrae

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66
Q

Rhomboideus Minor INSERTION

A

Medial border at root of spine of scapula

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67
Q

Rhomboideus Minor ACTION

A

Adduction, elevation, ER and downward rotation of scapula

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68
Q

Rhomboideus Minor NERVE

A

Dorsal Scapular n. (C4,5)

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69
Q

Teres Minor ORIGIN

A

Upper 2/3 and dorsal surface of lateral border of scapula

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70
Q

Teres Minor INSERTION

A

Lowest facet of greater tubercle of humerus, and shoulder joint capsule

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71
Q

Teres Minor ACTION

A

LR shoulder
Scapular IR
Stabilizes head of humerus in glenoid cavity during movements

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72
Q

Teres Minor NERVE

A

Axillary n. (C5,6)

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73
Q

Pronator teres ORIGIN

A

Humeral head:
Immediately above medial epicondyle of humerus, common flexor tendon, and deep antebrachial fascia

Ulnar head:
Medial side of coronoid process of ulna

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74
Q

Pronator teres INSERTION

A

Middle of lateral surface of radius

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75
Q

Pronator teres ACTION

A

Pronate forearm

Assists in elbow flexion

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76
Q

Pronator teres NERVE

A

Median n. (C6,7)

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77
Q

Flexor carpi radialis ORIGIN

A

Common flexor tendon from medial epicondyle of humerous, an deep antebrachial fascia

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78
Q

Flexor carpi radialis INSERTION

A

Base of 2nd metacarpal and slip to base of 3rd metacarpal bone

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79
Q

Flexor carpi radialis ACTION

A

ABD and flexion of wrist

Assists in forearm pronation and elbow flex

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80
Q

Flexor carpi radialis NERVE

A

Median n. (C6,7,8)

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81
Q

Palmaris longus ORIGIN

A

Common flexor tendon from medial epicondyle of humerous, deep antebrachial fascia

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82
Q

Palmaris longus INSERTION

A

Flexor retinaculum, and palmar aponeurosis

83
Q

Palmaris longus ACTION

A

Tenses palmar fascia
Flexion of wrist
Assists in elbow flexion

84
Q

Palmaris longus NERVE

A

Median n. (C6,7,8, T1)

85
Q

Flexor digitorum superficialis ORIGIN

A

Humeral head:
Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament of elbow joint, and deep antebrachial fascia

Ulnar head:
Medial side of coroniod process

Radial head:
Oblique line of radius

86
Q

Flexor digitorum superficialis INSERTION

A

By 4 tendons into sides of middle phalanges of 2-5th digits

87
Q

Flexor digitorum superficialis ACTION

A

Flexion of PIP of digits 2-5

Assists in MCP joint flexion and wrist flexion

88
Q

Flexor digitorum superficialis NERVE

A

Median n. (C7,8,T1)

89
Q

Flexor digitorum profundus ORIGIN

A

Anterior and medial surface of proximal ¾ of ulna, interosseus membrane, and deep antebrachial fascia

90
Q

Flexor digitorum profundus INSERTION

A

By 4 tendons into palmar surface of bases of distal phalanges of digits 2-5

91
Q

Flexor digitorum profundus ACTION

A

Flexion of DIP joint of digits 2-5

Assists in PIP, MCP and wrist flexion

92
Q

Flexor digitorum profundus NERVE

A

Lateral - Anterior interosseus n. (C7,8, T1)

Medial - Ulnar n. (C7,8, T1)

93
Q

Flexor pollicis longus ORIGIN

A

Anterior surface of body of radius below tuberosity, interosseus membrane, medial border or coronoid process or ulna, and/or medial epicondyle of humerus

94
Q

Flexor pollicis longus INSERTION

A

Base of distal phalanx of thumb, palmar surface

95
Q

Flexor pollicis longus ACTION

A

Thumb IP flexion

Assists in MCP and CMC flexion and wrist flexion

96
Q

Flexor pollicis longus NERVE

A

Anterior interosseus n. (C6,7,8,T1)

97
Q

Flexor pollicis brevis ORIGIN

A

Superficial head:
Flexor retinaculum and Trapezium bone

Deep head:
Trapezoid and Capitate bones

98
Q

Flexor pollicis brevis INSERTION

A

Base of proximal phalanx of thumb, radial side, and extensor expansion

99
Q

Flexor pollicis brevis ACTION

A

Flexion of MCP & CMC joints of thumb
Thumb opposition
May extend IP joint

100
Q

Flexor pollicis brevis NERVE

A

Superficial head:
Median n. (C6,7,8,T1),

Deep head:
Ulnar n. (C8,T1)

101
Q

Pronator quadratus ORIGIN

A

Anteromedial surface of distal ¼ of ulna

102
Q

Pronator quadratus INSERTION

A

Anterolateral surface of distal ¼ of radius

103
Q

Pronator quadratus ACTION

A

Pronate forearm

104
Q

Pronator quadratus NERVE

A

Anterior interosseus n. (C7,8,T1)

105
Q

Abductor pollicis brevis ORIGIN

A

Flexor retinaculum, tubercle of scaphoid and trapezium

106
Q

Abductor pollicis brevis INSERTION

A

Lateral aspect of base of proximal phalanx of thumb and extensor expansion

107
Q

Abductor pollicis brevis ACTION

A

Palmar abduction of CMC and MCP of thumb
Extend thumb IP joint
Assists in opposition, flexion and MR of CMC joint

108
Q

Abductor pollicis brevis NERVE

A

Median n. (C6,7,8,T1)

109
Q

Opponens pollicis ORIGIN

A

Flexor retinaculum

Tubercle of trapezium bone

110
Q

Opponens pollicis INSERTION

A

Entire length of first metacarpal bone, radial side

111
Q

Opponens pollicis ACTION

A

Opposes thumb CMC

112
Q

Opponens pollicis NERVE

A

Median (C6,7,8,T1)

113
Q

Lumbricals (UE) ORIGIN

A

1 and 2nd:
Radial surface of flexor profundus tendons of index and middle fingers, respectively

3rd:
Adjacent sides of flexor profundus tendons of middle and ring fingers

4th:
Adjacent sides of flexor profundus tendons of ring and little fingers”

114
Q

Lumbricals (UE) INSERTION

A

Into the radial border of the extensor expansion on the dorsum of the respective digits

115
Q

Lumbricals (UE) ACTION

A

Extends IP joint and simultaneously flex MCP joints of 2-5th digits
Extend IP joints with MCP extended

116
Q

Lumbricals (UE) NERVE

A

1st and 2nd: Median (C6,7,8,T1)

3rd and 4th: Ulnar C7,8,T1)

117
Q

Flexor carpi ulnaris ORIGIN

A

Humeral head:
Common flexor tendon from medial epicondyle of humerus

Ulnar head:
Medial margin of olecranon via aponeorosis
Proximal 2/3 of posterior border of ulna
Deep antebrachial fascia

118
Q

Flexor carpi ulnaris INSERTION

A

Pisiform bone and by ligaments to hamate and 5th metacarpal bones

119
Q

Flexor carpi ulnaris ACTION

A

Flexion and ulnar deviation of wrist

Assists in elbow flexion

120
Q

Flexor carpi ulnaris NERVE

A

Ulnar n. (C6,7,8,T1)

121
Q

Abductor digiti minimi ORIGIN

A

Tendon of flexor carpi ulnaris and PISIFORM bone

122
Q

Abductor digiti minimi INSERTION

A

By 2 slips, one into base of proximal phalanx of little finger, ulnar side, 2nd into the ulnar border of the extensor expansion

123
Q

Abductor digiti minimi ACTION

A

Abduct small finger MP joint
Assists in opposition and flexion of CMC of 5th digit
Assists in extension of IP joint

124
Q

Abductor digiti minimi NERVE

A

Ulnar n. (C7,8,T1)

125
Q

Flexor digiti minimi ORIGIN

A

Hook of hamate, and flexor retinaculum

126
Q

Flexor digiti minimi INSERTION

A

Base of proximal phalanx of 5th digit, ulnar side

127
Q

Flexor digiti minimi ACTION

A

Flexion of MCP joint of little finger

Assists in opposition

128
Q

Flexor digiti minimi NERVE

A

Ulnar n. (C7,8,T1)

129
Q

Opponens digiti minimi ORIGIN

A

Hook of hamate

Flexor retinaculum

130
Q

Opponens digiti minimi INSERTION

A

Entire length of 5th metacarpal, ulnar side

131
Q

Opponens digiti minimi ACTION

A

Opposes 5th CMC joint

132
Q

Opponens digiti minimi NERVE

A

Ulnar n. (C7,8,T1)

133
Q

Interossei (UE) ORIGIN

A

DORSAL:
1st Lateral head:
Proximal ½ of ulnar border of 1st metacarpal bone
1st Medial head:
Radial border of 2nd metacapal bone
2-4th:
Adjacent sides of metacarpal bones in each interspace

PALMAR:

1st: Length of 2nd metacarpal bone, ulnar side
2nd: Length of 4th metacarpal bone, radial side
3rd: Length of 5th metacarpal bone, radial side

134
Q

Interossei (UE) INSERTION

A 
Into extensor expansion and to base of proximal phalanx as follows:
1st:  Radial side of 2nd digit, chiefly
to base of proximal phalanx
2nd: Radial side of 3rd digit
3rd: Ulnar side of 3rd digit into
extensor expansion
4th:  Ulnar side of 4th digit

Chiefly into the extensor expansion of the respective digit, with possible attachment to the base of proximal phalanx as follows:
1-Ulnar side of 2nd digit
2-Radial side of 4th digit
3-Radial side of 5th digit

135
Q

Interossei (UE) ACTION

A

DORSAL:
ABD of digits 2-4 from axial line through third digit
Assists in MCP flexion and extension of IP joint of digits 2-4
1st dorsal interossei assists with thumb ADD

PALMAR:
ADD of digits 2,4, and 5
Assists in MCP flexion and extension of IP of digits 2,4, and 5

136
Q

Interossei (UE) NERVE

A

Ulnar n. (C8,T1)

137
Q

Adductor Pollicis ORIGIN

A

Oblique fibers:
Capitate bone, bases of 2nd and 3rd metacarpals

Transverse fibers:
Palmar surface of 3rd metacarpal

138
Q

Adductor Pollicis INSERTION

A

Oblique head:
Into extensor expansion

Transverse head:
Into ulnar side of base of proximal phalanx of thumb

139
Q

Adductor Pollicis ACTION

A

ADD of CMC
Assists in flexion of MCP joint of thumb
Assists thumb opposition and extension of IP joint

140
Q

Adductor Pollicis NERVE

A

Ulnar n. (C8,T1)

141
Q

Triceps Brachii ORIGIN

A

Long head:
Infraglenoid tubercle of scapula

Lateral head:
Lateral and posterior surface of proximal ½ of body of humerus, lateral intermuscular septum

Medial head:
Distal 2/3 of medial and posterior surface of humerus below the radial groove, and from medial intermuscular septum

142
Q

Triceps Brachii INSERTION

A

Posterior surface of olecranon process of ulna and antebrachial fascia

143
Q

Triceps Brachii ACTION

A

Extend elbow

Long head:
Assists in ADD and extension of shoulder

144
Q

Triceps Brachii NERVE

A

Radial n. (C6,7,8,T1)

145
Q

Anconeus ORIGIN

A

Lateral epicondyle of humerus, posterior surface

146
Q

Anconeus INSERTION

A

Lateral side of olecranon process, upper ¼ of posterior surface of body of ulna

147
Q

Anconeus ACTION

A

Extend elbow, stabilize ulna during pronation & supination

148
Q

Anconeus NERVE

A

Radial n. (C7,8)

149
Q

Brachioradialis ORIGIN

A

Proximal 2/3 of lateral supracondylar ridge of humerus, lateral intermuscular septum

150
Q

Brachioradialis INSERTION

A

Lateral side of base of styloid process of radius

151
Q

Brachioradialis ACTION

A

Elbow flexion

Assists in pronation & supination of forearm

152
Q

Brachioradialis NERVE

A

Radial n. (C5,6)

153
Q

Extensor carpi radialis longus ORIGIN

A

Distal 1/3 of lateral supracondylar ridge of humerus and lateral intermuscular septum

154
Q

Extensor carpi radialis longus INSERTION

A

Dorsal surface of base of 2nd metacarpal bone, radial side

155
Q

Extensor carpi radialis longus ACTION

A

Extends and radially deviates wrist

Assists in elbow flexion

156
Q

Extensor carpi radialis longus NERVE

A

Radial n. (C5,6,7,8)

157
Q

Extensor carpi radialis brevis ORIGIN

A

Common extensor tendon from lateral epicondyle of humerus, radial collateral ligament of elbow joint, and deep antebrachial fascia

158
Q

Extensor carpi radialis brevis INSERTION

A

Dorsal surface of base of 3rd metacarpal bone

159
Q

Extensor carpi radialis brevis ACTION

A

Extends wrist

Assist in wrist radial deviation

160
Q

Extensor carpi radialis brevis NERVE

A

Radial - posterior interosseus n. (C6,7,8)

161
Q

Extensor digitorum ORIGIN

A

Common extensor tendon from lateral epicondyle of humerus, and deep antebrachial fascia

162
Q

Extensor digitorum INSERTION

A

By 4 tendons to extensor expansion on the dorsum of digits 2-5, attaching to the sagittal bands and then dividing over the proximal phalanx into a medial and two lateral bands.

MEDIAL BAND:
Into the base of the middle phalanx (central slip)

LATERAL BANDS:
Reunite over the middle phalanx and insert into the base of the distal phalanx (terminal tendon)

163
Q

Extensor digitorum ACTION

A

Extend MCP joint and in conjunction with lumbricals and interossei,
Extend IP joints of digits 2-5
Assist in abducting digits 2,4 and 5
Extend and radial deviate wrist

164
Q

Extensor digitorum NERVE

A

Radial - posterior interosseus n. (C6,7,8)

165
Q

Extensor digiti minimi ORIGIN

A

Common extensor tendon from lateral epicondyle of humerus & deep antebrachial fascia

166
Q

Extensor digiti minimi INSERTION

A

Into extensor expansion of little finger with extensor

digitorum tendon

167
Q

Extensor digiti minimi ACTION

A

Extend MCP joint
Extend IP joints of little finger in conjunction with lumbricals and interossei
Assist in ABD of 5th digit

168
Q

Extensor digiti minimi NERVE

A

Radial - posterior interosseus n. (C6,7,8)

169
Q

Extensor carpi ulnaris ORIGIN

A

Common extensor tendon from lateral epicondyle of humerus by aponeurosis from posterior border of ulna & deep antebrachial fascia

170
Q

Extensor carpi ulnaris INSERTION

A

Base of 5th metacarpal bone, ulnar side

171
Q

Extensor carpi ulnaris ACTION

A

Extend and ulnarly deviate wrist

172
Q

Extensor carpi ulnaris NERVE

A

Radial - posterior interosseus n. (C6,7,8)

173
Q

Extensor indicis ORIGIN

A

Posterior surface of body of ulna distal to origin of extensor pollicis longus & interosseus membrane

174
Q

Extensor indicis INSERTION

A

Into extensor expansion of index finger with extensor digitorum longus tendon

175
Q

Extensor indicis ACTION

A

Extend MCP joint
Extend IP joint of index finger in conjunction with lumbricals and interossei
Assist in adduction of index

176
Q

Extensor indicis NERVE

A

Radial n. (C6,7,8)

177
Q

Abductor pollicis longus ORIGIN

A

Posterior surface of body of ulna distal to origin of supinator, interosseus membrane, and posterior surface of middle 1/3 of body of radius

178
Q

Abductor pollicis longus INSERTION

A

Base of 1st metacarpal bone, radial side

179
Q

Abductor pollicis longus ACTION

A

Extend CMC joint of thumb with slight abduction
Wrist radial deviation
Assists wrist flexion

180
Q

Abductor pollicis longus NERVE

A

Radial n. (C6,7,8)

181
Q

Extensor pollicis longus ORIGIN

A

middle 1/3 of posterior surface of ulna distal to origin of APL & interosseus membrane

182
Q

Extensor pollicis longus INSERTION

A

Base of distal phalanx of thumb, dorsal surface

183
Q

Extensor pollicis longus ACTION

A

Extend IP joint of thumb
Assists thumb MCP and CMC extension
Assists in radial deviation and extension of wrist

184
Q

Extensor pollicis longus NERVE

A

Radial n. (C6,7,8)

185
Q

Extensor pollicis brevis ORIGIN

A

Posterior surface of body of radius distal to origin of APL and interosseus membrane

186
Q

Extensor pollicis brevis INSERTION

A

Base of proximal phalanx of thumb, dorsal surface

187
Q

Extensor pollicis brevis ACTION

A

Extend thumb MCP joint
Extend and abduct CMC joint
Assists in wrist radial deviation

188
Q

Extensor pollicis brevis NERVE

A

Radial n. (C6,7,8)

189
Q

Supinator ORIGIN

A

Lateral epicondyle of humerus, radial collateral ligament of elbow joint, annular ligament of radius, and supinator crest of ulna

190
Q

Supinator INSERTION

A

Lateral surface of upper 1/3 of body of radius covering part of anterior and post surface

191
Q

Supinator ACTION

A

Supinate forearm

192
Q

Supinator NERVE

A

Radial - posterior interosseus n. (C5,6,7)

193
Q

Coracobrachialis ORIGIN

A

Apex of coracoid process of scapular

194
Q

Coracobrachialis INSERTION

A

Medial surface of middle of shaft of humerus, opposite deltoid tuberosity

195
Q

Coracobrachialis ACTION

A

Flexion and adduction of shoulder

196
Q

Coracobrachialis NERVE

A

Musculocutaneous (C6,7)

197
Q

Biceps Brachii ORIGIN

A

“Short head
Apex of coracoid process of scapula
Long head
Supraglenoid tubercle of scapula”

198
Q

Biceps Brachii INSERTION

A

Radial tuberosity, aponeurosis

of biceps brachii

199
Q

Biceps Brachii ACTION

A

Long head:
Evidence is unclear regarding role of LHBT at the shoulder.
May passively restrict humeral anterior and superior translation.

Origin fixed: Elbow flexion moving forearm toward humerus, forearm supination

Insertion fixed: Elbow flexion moving humerus toward forearm

May contribute to scapular anterior tilt
Shoulder flexion

200
Q

Biceps Brachii NERVE

A

Musculocutaneous (C5,6)

201
Q

Brachialis ORIGIN

A

Distal ½ of anterior surface of humerus, medial and lateral intermuscular septa

202
Q

Brachialis INSERTION

A

Tuberosity and coronoid process of ulna

203
Q

Brachialis ACTION

A

Elbow flexion

204
Q

Brachialis NERVE

A

Musculocutaneous (C5,6)

Anatomy (8 decks)

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