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Human Anatomy > Upper Body O, I, A, N > Flashcards

Upper Body O, I, A, N Flashcards

1
Q

Trapezius Origin

A

Medial 1/3 of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7-T12

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2
Q

Trapezius Insertion

A

Lateral 1/3 of clavicle; acromion process; spine of scapula

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3
Q

Trapezius Action

A

Descending part: elevates shoulder
Ascending part: depresses shoulder
Middle part or all: retracts scapula
Ascending & descending together: rotate glenoid superiorly

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4
Q

Trapezius Innervation

A

Spinal accessory nerve (Cranial XI) and C3&C4 spinal nerves

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5
Q

Latissimus Dorsi Origin

A

Spinous processes of T7-T12; thoracolumbar fascia; iliac crest; ribs 9-12

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6
Q

Latissimus Dorsi Insertion

A

Floor of intertubercular sulcus of humerus

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7
Q

Latissimus Dorsi Action

A

Extends, adducts, and medially rotates shoulder joint; raises body during climbing

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8
Q

Latissimus Dorsi Innervation

A

Thoracodorsal nerve (C6, C7, C8)

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9
Q

Rhomboid Major Origin

A

Spinous processes of T2-T5

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10
Q

Rhomboid Major Insertion

A

Medial border of scapula from spine to inferior angle

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11
Q

Rhomboid Major Action

A

Retracts scapula; rotates to depress glenoid cavity; holds scapula to body wall

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12
Q

Rhomboid Major Innervation

A

Dorsal scapular nerve (C4, C5)

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13
Q

Rhomboid Minor Origin

A

Nuchal ligament; spinous processes of C7-T1

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14
Q

Rhomboid Minor Insertion

A

Scapula at medial end of scapular spine

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15
Q

Rhomboid Minor Action

A

Retracts scapula; rotates to depress glenoid cavity; holds scapula to body wall

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16
Q

Rhomboid Minor Innervation

A

Dorsal scapular nerve (C4, C5)

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17
Q

Levator Scapulae Origin

A

Posterior tubercles of transverse processes of C1-C4

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18
Q

Levator Scapulae Insertion

A

Medial border of scapula from superior angle to spine

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19
Q

Levator Scapulae Action

A

Dorsal scapular (C5) and cervical (C3,C4) spinal nerves

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20
Q

Levator Scapulae Innervation

A

Elevates scapula; rotates glenoid inferiorly

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21
Q

Erector Spinae: Origin
Iliocostalis
Longissimus
Spinalis

A

Broad tendon from posterior iliac crest, posterior sacrum, sacro-iliac ligaments, inferior lumbar and sacral spinous processes, and supraspinous ligament

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22
Q

Erector Spinae: Inseriton
Iliocostalis
Longissimus
Spinalis

A

Iliocostalis: run superiorly to angles of ribs and transverse processes of cervical verts
Longissimus: run superiorly to ribs between tubercles and angles; to transverse processes on thoracic and cervical verts; and to mastoid process
Spinalis: run superiorly to spinous processes of upper thoracic and cervical verts

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23
Q

Erector Spinae: Action
Iliocostalis
Longissimus
Spinalis

A

Extend head and vertebral column; laterally flex vertebral column

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24
Q

Erector Spinae: Innervation
Iliocostalis
Longissimus
Spinalis

A

Dorsal (posterior) rami of spinal nerves

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25
Q

Splenius Capitis
Splenius Cervicis
Origin

A

Nuchal ligament and spinous processes of C7-T6

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26
Q

Splenius Capitis
Splenius Cervicis
Insertion

A

Capitis: superolaterally to mastoid process and lateral 1/3 of nuchal line
Cervicis: tubercles of transverse processes of C1-C4

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27
Q

Splenius Capitis
Splenius Cervicis
Action

A

Flex neck; rotate head; extend head and neck

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28
Q

Splenius Capitis
Splenius Cervicis
Innervation

A

Dorsal (posterior) rami of spinal nerves

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29
Q

Semispinalis Capitis Origin

A

Transverse processes of C7-T6; articular processes of C4-C6

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30
Q

Semispinalis Capitis Insertion

A

Occipital bone

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31
Q

Semispinalis Capitis Action

A

Extends head

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32
Q

Semispinalis Capitis Innervation

A

Dorsal (posterior) rami of spinal nerves

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33
Q

Serratus Posterior Superior Origin

A

Nuchal ligament; spinous processes of C7-T3

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34
Q

Serratus Posterior Superior Insertion

A

Ribs 2-4 on superior borders

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35
Q

Serratus Posterior Superior Action

A

Elevate ribs

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36
Q

Serratus Posterior Superior Innervation

A

2nd-5th intercostal nerves

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37
Q

Serratus Posterior Inferior Origin

A

Spinous processes of T11-L2

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38
Q

Serratus Posterior Inferior Insertion

A

Ribs 8-12 on inferior borders near their angles

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39
Q

Serratus Posterior Inferior Action

A

Depresses ribs

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40
Q

Serratus Posterior Inferior Innervation

A

9th-11th intercostal nerves, subcostal (T12) nerve

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41
Q

Semispinalis Origin

A

Transverse processes of C4-T10

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42
Q

Semispinalis Insertion

A

Occipital bone and spinous processes in upper thoracic and cervical regions 4-6 segments superior

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43
Q

Semispinalis Action

A

Extends head + thoracic and cervical regions of vertebral column; rotates column contralaterally

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44
Q

Semispinalis Innervation

A

Dorsal (posterior) rami of spinal nerves

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45
Q

Multifidus Origin

A

Posterior sacrum; PSIS of ilium; aponeurosis of erector spinae; sacro-iliac ligaments; mammillary processes of lumbar verts., transverse processes of thoracic verts., articular processes of C4-C7

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46
Q

Multifidus Insertion

A

Spinous processes of vertebrae 2-4 segments superior

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47
Q

Multifidus Action

A

Stabilizes vertebrae during movements of vertebral column; rotates column contralaterally

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48
Q

Multifidus Innervation

A

Dorsal (posterior) rami of spinal nerves

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49
Q

Rotatores Origin

A

Transverse processes of vertebrae

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50
Q

Rotatores Insertion

A

Junctions of lamina and either transverse processes or spinous processes 1 (brevis)-2 (longus) segments superior.

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51
Q

Rotatores Action

A

Stabilizes vertebrae during movements of vertebral column; rotates column contralaterally; may be organs of proprioceptions

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52
Q

Rotatores Innervation

A

Dorsal (posterior) rami of spinal nerves

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53
Q

Interspinales Origin

A

Superior surfaces of spinous processes of cervical and thoracic vertebrae

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54
Q

Interspinales Insertion

A

Inferior surfaces of spinous processes of vertebrae superior to vertebra of origin.

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55
Q

Interspinales Action

A

Extension and rotation of vertebral column

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56
Q

Interspinales Innervation

A

Dorsal (posterior) rami of spinal nerves

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57
Q

Intertransversarii Origin

A

Transverse processes of cervical and thoracic verts

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58
Q

Intertransversarii Insertion

A

Transverse processes of adjacent vertebrae

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59
Q

Intertransversarii Action

A

Dorsal (posterior) and ventral (anterior) rami of spinal nerves

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60
Q

Intertransversarii Innervation

A

Lateral flexion of vertebral column; stabilize vertebral column

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61
Q

Levatores Costarum Origin

A

Tips of transverse processes of C7 + T1-T11

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62
Q

Levatores Costarum Insertion

A

Pass inferolaterally and insert on rib between tubercle and angle

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63
Q

Levatores Costarum Action

A

Elevate ribs, assisting in respiration; lateral flexion of vertebral column

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64
Q

Levatores Costarum Innervation

A

Posterior rami of C8-T11 spinal nerves

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65
Q

External intercostal Origin

A

Inferior border of ribs

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66
Q

External intercostal Insertion

A

Superior border of ribs inferiorly

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67
Q

External intercostal Action

A

During forced inspiration – elevate ribs

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68
Q

External intercostal Innervation

A

Intercostal nerve

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69
Q

Internal intercostal Origin

A

Inferior border of ribs

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70
Q

Internal intercostal Insertion

A

Superior border of ribs inferiorly

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71
Q

Internal intercostal Action

A

During forced respiration – interosseus part depresses ribs, interchondral part elevates ribs

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72
Q

Internal intercostal Innervation

A

Intercostal nerve

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73
Q

Innermost intercostal Origin

A

Inferior border of ribs

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74
Q

Innermost intercostal Insertion

A

Superior border of ribs inferiorly

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75
Q

Innermost intercostal Action

A

During forced respiration – interosseus part depresses ribs, interchondral part elevates ribs

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76
Q

Innermost intercostal Innervation

A

Intercostal nerve

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77
Q

Transversus thoracis Origin

A

Posterior surface of inferior sternum

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78
Q

Transversus thoracis Insertion

A

Internal surface of costal cartilages 2-6

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79
Q

Transversus thoracis Action

A

Weakly depresses limbs

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80
Q

Transversus thoracis Innervation

A

Intercostal nerve

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81
Q

Subcostal Origin

A

Internal surface of lower ribs near their angles

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82
Q

Subcostal Insertion

A

Superior borders of 2nd or 3rd ribs below

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83
Q

Subcostal Action

A

Probably during forced respiration – interosseus part depresses ribs, interchondral part elevates ribs

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84
Q

Subcostal Innervation

A

Intercostal nerve

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85
Q

Pectoralis Major Origin

A

Clavicular head: anterior surface of medial half o clavicle

Sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle

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86
Q

Pectoralis Major Insertion

A

Lateral lip of intertubercular sulcus of humerus

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87
Q

Pectoralis Major Action

A

Adducts and medially rotates shoulder joint, draws scapula anteriorly and inferiorly
Clavicular head: flexes shoulder joint
Sternocostal head: extends shoulder joint from the flexed position

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88
Q

Pectoralis Major Innervation

A

Lateral and medial pectoral nerves, clavicular head (C5, C6), sternocostal head (C7, C8, T1)

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89
Q

Pectoralis Minor Origin

A

3rd-5th ribs near their costal cartilages

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90
Q

Pectoralis Minor Insertion

A

Medial border and superior surface of coracoid process of scapula

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91
Q

Pectoralis Minor Action

A

Stabilizes scapula by drawing inferiorly and anteriorly against thoracic wall; depresses shoulder

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92
Q

Pectoralis Minor Innervation

A

Medial pectoral nerve (C8, T1)

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93
Q

Subclavius Origin

A

Junction of 1st rib and its costal cartilage

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94
Q

Subclavius Insertion

A

Inferior surface of middle third of clavicle

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95
Q

Subclavius Action

A

Anchors and depresses clavicle

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96
Q

Subclavius Innervation

A

Subclavian nerve (C5, C6)

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97
Q

Serratus Anterior Origin

A

External surfaces of lateral parts of 1st-8th ribs

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98
Q

Serratus Anterior Insertion

A

Anterior surface of medial border of scapula

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99
Q

Serratus Anterior Action

A

Protracts scapula and holds against thoracic wall; rotates scapula

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100
Q

Serratus Anterior Innervation

A

Long thoracic nerve (C5, C6, C7)

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101
Q

Deltoid Origin

A

Lateral third of clavicle; acromion; spine of scapula

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102
Q

Deltoid Insertion

A

Deltoid tuberosity of humerus

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103
Q

Deltoid Action

A

Clavicular (anterior): flexes and medially rotates shoulder
Acromial (middle) or all together: abducts shoulder joint after first 15°
Spinal (posterior): extends and laterally rotates shoulder joint

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104
Q

Deltoid Innervation

A

Axillary nerve (C5, C6)

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105
Q

Supraspinatus Origin

A

Supraspinous fossa of scapula

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106
Q

Supraspinatus Inseriton

A

Superior facet of greater tubercle of humerus

107
Q

Supraspinatus Action

A

Initiates (first 15°) and assists deltoid in abduction of shoulder joint; part of rotator cuff

108
Q

Supraspinatus Innervation

A

Suprascapular nerve (C4, C5, C6)

109
Q

Infraspinatus Origin

A

Infraspinous fossa of scapula

110
Q

Infraspinatus Insertion

A

Middle facet of greater tubercle of humerus

111
Q

Infraspinatus Action

A

Laterally rotates shoulder joint; part of rotator cuff

112
Q

Infraspinatus Innervation

A

Suprascapular nerve (C4, C5, C6)

113
Q

Teres Major Origin

A

Middle part of lateral border of scapula

114
Q

Teres Major Insertion

A

Inferior facet of greater tubercle of humerus

115
Q

Teres Major Action

A

Laterally rotates shoulder joint; part of rotator cuff

116
Q

Teres Major Innervation

A

Axillary nerve (C5, C6)

117
Q

Teres Minor Origin

A

upper two-thirds of the lateral border of scapula

118
Q

Teres Minor Insertion

A

Medial lip of intertubercular sulcus of humerus

119
Q

Teres Minor Action

A

Adducts and medially rotates shoulder joint

120
Q

Teres Minor Innervation

A

Lower subscapular nerve (C5, C6)

121
Q

Subscapularis Origin

A

Subscapular fossa

122
Q

Subscapularis Insertion

A

Lesser tubercle of humerus

123
Q

Subscapularis Action

A

Medially rotates and adducts shoulder joint; part of rotator cuff

124
Q

Subscapularis Innervation

A

Upper and lower subscapular nerves (C5, C6, C7)

125
Q

Biceps brachii Origin

A

Short head: tip of coracoid process of scapula

Long head: supraglenoid tubercle of scapula

126
Q

Biceps brachii Insertion

A

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

127
Q

Biceps brachii Action

A

Supinates forearm and, when it is supinated, flexes elbow joint. Flexes shoulder joint. Short head resists shoulder dislocation.

128
Q

Biceps brachii Innervation

A

Musculocutaneous nerve (C5, C6)

129
Q

Brachialis Origin

A

Distal half of anterior surface of humerus

130
Q

Brachialis Insertion

A

Coronoid process and tuberosity of ulna

131
Q

Brachialis Action

A

Flexes elbow joint

132
Q

Brachialis Innervation

A

Musculocutaneous nerve (C5, C6)

133
Q

Coracobrachialis Origin

A

Tip of coracoid process of scapula

134
Q

Coracobrachialis Insertion

A

Middle third of medial surface of humerus

135
Q

Coracobrachialis Action

A

Flexes and adducts shoulder joint; resists shoulder dislocation

136
Q

Coracobrachialis Innervation

A

Musculocutaneous nerve (C5, C6)

137
Q

Triceps brachii Origin

A

Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus superior to radial groove
Medial head: posterior surface of humerus inferior to radial groove

138
Q

Triceps brachii Insertion

A

Proximal end of olecranon of ulna and fascia of forearm

139
Q

Triceps brachii Action

A

Chief extensor of elbow joint

Long head: extends shoulder joint and resists dislocation of humerus (esp during abduction)

140
Q

Triceps brachii Innervation

A

Radial nerve (C6, C7, C8)

141
Q

Anconeus Origin

A

Lateral epicondyle of humerus

142
Q

Anconeus Insertion

A

Lateral surface of olecranon and superior part of posterior surface of ulna

143
Q

Anconeus Action

A

Assists triceps in extending elbow joint; stabilizes elbow joint; abducts ulna during pronation

144
Q

Anconeus Innervation

A

Radial nerve (C7, C8, T1)

145
Q

Pronator Teres (PT) Origin

A

Ulnar head: coronoid process of ulna

Humeral head: medial epicondyle of humerus

146
Q

Pronator Teres (PT) Insertion

A

Middle of convexity of lateral surface of radius

147
Q

Pronator Teres (PT) Action

A

Pronates and flexes forearm

148
Q

Pronator Teres (PT) Innervation

A

Median nerve (C6, C7)

149
Q

Flexor carpi radialis (FCR) Origin

A

Medial epicondyle of humerus

150
Q

Flexor carpi radialis (FCR) Insertion

A

Base of 2nd (3rd) metacarpal

151
Q

Flexor carpi radialis (FCR) Action

A

Flexes and abducts hand at wrist

152
Q

Flexor carpi radialis (FCR) Innervation

A

Median nerve (C6, C7)

153
Q

Palmaris longus Origin

A

Medial epicondyle of humerus

154
Q

Palmaris longus Insertion

A

Distal half of flexor retinaculum, palmar aponeurosis

155
Q

Palmaris longus Action

A

Flexes hand at wrist and tenses palmar aponeurosis

156
Q

Palmaris longus Innervation

A

Median nerve (C7, C8)

157
Q

Flexor carpi ulnaris
Humeral head and ulnar head
Origin

A

Ulnar head: Olecranon and posterior border of ulna (via aponeurosis)
Humeral head: medial epicondyle of humerus

158
Q

Flexor carpi ulnaris
Humeral head and ulnar head
Insertion

A

Pisiform, hook of hamate, 5th metacarpal

159
Q

Flexor carpi ulnaris
Humeral head and ulnar head
Action

A

Flexes and adducts hand at wrist

160
Q

Flexor carpi ulnaris
Humeral head and ulnar head
Innervation

A

Ulnar nerve (C7, C8)

161
Q

Flexor digitorum superficialis (FDS) Origin

A

Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
Radial head: oblique line of radius

162
Q

Flexor digitorum superficialis (FDS) Insertion

A

Shafts (bodies) of middle phalanges of medial four digits

163
Q

Flexor digitorum superficialis (FDS) Action

A

Flexes wrist joint
Flexes proximal interphalangeal joins of middle four digits; also flexes proximal phalanges at metacarpophalangeal joints

164
Q

Flexor digitorum superficialis (FDS) Innervation

A

Median nerve (C7, C8, T1)

165
Q

Flexor digitorum profundus (FDP) Origin

A

Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane

166
Q

Flexor digitorum profundus (FDP) Insertion

A

Bases of distal phalanges of medial four digits

167
Q

Flexor digitorum profundus (FDP) Action

A

Flexes wrist joint

Flexes distal interphalangeal joints of medial four digits; assists with writs flexion

168
Q

Flexor digitorum profundus (FDP) Innervation

A 
Lateral part (digits 2-3): Median nerve (C8, T1) (anterior interosseous branch)
Medial part (digits 4-5): Ulnar nerve (C8, T1)
169
Q

Flexor pollicis longus (FPL) Origin

A

Anterior surface of radius and adjacent interosseous membrane

170
Q

Flexor pollicis longus (FPL) Insertion

A

Base of distal phalanx of thumb

171
Q

Flexor pollicis longus (FPL) Action

A

Flexes wrist

Flexes metacarpophalangeal and interphalangeal joints of the thumb

172
Q

Flexor pollicis longus (FPL) Innervation

A

Anterior interosseous nerve from Median nerve (C8, T1)

173
Q

Pronator Quadratus Origin

A

Distal quarter of anterior surface of ulna

174
Q

Pronator Quadratus Insertion

A

Distal quarter of anterior surface of radius

175
Q

Pronator Quadratus Action

A

Pronates forearm. Deep fibers bind radius and ulna together.

176
Q

Pronator Quadratus Innervation

A

Anterior interosseous nerve from Median nerve (C8, T1)

177
Q

Brachioradialis Origin

A

Proximal 2/3 of lateral supraepicondylar ridge of humerus

178
Q

Brachioradialis Insertion

A

Lateral surface of distal end of radius proximal to styloid process

179
Q

Brachioradialis Action

A

Relatively weak flexion of elbow joint, maximal when forearm is in midpronated position

180
Q

Brachioradialis Innervation

A

Radial nerve (C5, C6, C7)

181
Q

Extensor carpi radialis longus Origin

A

Lateral supra-epicondylar ridge of humerus

182
Q

Extensor carpi radialis longus Insertion

A

Dorsal aspect of base of 2nd metacarpal

183
Q

Extensor carpi radialis longus Action

A

Extend and abduct wrist joint

184
Q

Extensor carpi radialis longus Innervation

A

Radial nerve (C6, C7)

185
Q

Extensor carpi radialis brevis Origin

A

Lateral epicondyle of humerus

186
Q

Extensor carpi radialis brevis Insertion

A

Dorsal aspect of base of 3rd metacarpal

187
Q

Extensor carpi radialis brevis Action

A

Extend and abduct wrist joint; active during fist clenching.

188
Q

Extensor carpi radialis brevis Innervation

A

Deep branch of radial nerve (C7, C8)

189
Q

Extensor digitorum Origin

A

Lateral epicondyle of humerus

190
Q

Extensor digitorum Insertion

A

Extensor expansions of medial four fingers

191
Q

Extensor digitorum Action

A

Extend wrist joint.

Extend medial four fingers primarily at metacarpophalangeal joints, secondarily at interphalangeal joints.

192
Q

Extensor digitorum Innervation

A

Posterior interosseous nerve (C7, C8); continuation of deep branch of radial nerve

193
Q

Extensor digiti minimi Origin

A

Lateral epicondyle of humerus

194
Q

Extensor digiti minimi Insertion

A

Extensor expansion of 5th finger

195
Q

Extensor digiti minimi Action

A

Extends wrist joint.

Extends 5th finger primarily at metacarpophalangeal joint, secondarily at interphalangeal joint

196
Q

Extensor digiti minimi Innervation

A

Posterior interosseous nerve (C7, C8); continuation of deep branch of radial nerve

197
Q

Extensor carpi ulnaris Origin

A

Lateral epicondyle of humerus; posterior border of ulna via a shared aponeurosis

198
Q

Extensor carpi ulnaris Insertion

A

Dorsal aspect of base of 5th metacarpal

199
Q

Extensor carpi ulnaris Action

A

Extends and adducts wrist joint; active during fist clenching

200
Q

Extensor carpi ulnaris Innervation

A

Posterior interosseous nerve (C7, C8); continuation of deep branch of radial nerve

201
Q

Supinator Origin

A

Lateral epicondyle of humerus; radial collateral and anular ligaments; supinator fossa; crest of ulna

202
Q

Supinator Insertion

A

Lateral, posterior, and anterior surfaces of proximal third of radius

203
Q

Supinator Action

A

Supinates forearm; rotates radius to turn palm anteriorly or superiorly (if elbow is flexed)

204
Q

Supinator Innervation

A

Deep branch of radial nerve (C7, C8)

205
Q

Abductor pollicis longus Origin

A

Posterior surface of proximal halves of ulna, radius, and interosseous membrane

206
Q

Abductor pollicis longus Insertion

A

Base of 1st metacarpal

207
Q

Abductor pollicis longus Action

A

Extends wrist joint

Abducts thumb and extends it at carpometacarpal joint

208
Q

Abductor pollicis longus Innervation

A

Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

209
Q

Extensor pollicis longus Origin

A

Posterior surface of middle third of ulna and interosseous membrane

210
Q

Extensor pollicis longus Insertion

A

Dorsal aspect of base of distal phalanx of thumb

211
Q

Extensor pollicis longus Action

A

Extends wrist joint

Extends distal phalanx of thumb at interphalangeal joint, extends metacarpophalangeal and

212
Q

Extensor pollicis longus Innervation

A

Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

213
Q

Extensor pollicis brevis Origin

A

Posterior surface of distal third of radius and interosseous membrane

214
Q

Extensor pollicis brevis Insertion

A

Dorsal aspect of base of proximal phalanx of thumb

215
Q

Extensor pollicis brevis Action

A

Extends wrist joint

Extends proximal phalanx of thumb at metacarpophalangeal joint; extends carpometacarpal joint

216
Q

Extensor pollicis brevis Innervation

A

Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

217
Q

Extensor Indicis Origin

A

Posterior surface of distal 1/3 of ulna and interosseous membrane

218
Q

Extensor Indicis Insertion

A

Extensor expansion of 2nd finger

219
Q

Extensor Indicis Action

A

Extends wrist joint

Extends 2nd finger (enabling its independent extension); helps extend hand at wrist.

220
Q

Extensor Indicis Innervation

A

Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

221
Q

Opponens pollicis Origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

222
Q

Opponens pollicis Insertion

A

Lateral side of 1st metacarpal

223
Q

Opponens pollicis Action

A

To oppose thumb, it draws 1st metacarpal medially to center of palm and rotates it medially

224
Q

Opponens pollicis Innervation

A

Recurrent branch of median nerve (C8, T1)

225
Q

Abductor pollicis brevis Origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

226
Q

Abductor pollicis brevis Insertion

A

Lateral side of base of proximal phalanx of thumb

227
Q

Abductor pollicis brevis Action

A

Abducts thumb, helps oppose it

228
Q

Abductor pollicis brevis Innervation

A

Recurrent branch of median nerve (C8, T1)

229
Q

Flexor pollicis brevis:
superficial head, deep head
Origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

230
Q

Flexor pollicis brevis:
superficial head, deep head
Insertion

A

Lateral side of base of proximal phalanx of thumb

231
Q

Flexor pollicis brevis:
superficial head, deep head
Action

A

Flexes thumb

232
Q

Flexor pollicis brevis:
superficial head, deep head
Innervation

A

Superficial head: Recurrent branch of median nerve (C8, T1)

Deep head: Deep branch of ulnar nerve (C8, T1)

233
Q

Adductor pollicis:
oblique head, transverse head
Origin

A

Bases of 2nd and 3rd metacarpals, capitate, adjacent carpals.

Anterior surface of shaft of 3rd metacarpal.

234
Q

Adductor pollicis:
oblique head, transverse head
Insertion

A

Medial head side of base of proximal phalanx of thumb

235
Q

Adductor pollicis:
oblique head, transverse head
Action

A

Adducts thumb toward lateral border of palm

236
Q

Adductor pollicis:
oblique head, transverse head
Innervation

A

Deep branch of ulnar nerve (C8, T1)

237
Q

Abductor digiti minimi Origin

A

Pisiform

238
Q

Abductor digiti minimi Inseriton

A

Medial side of base of proximal phalanx of 5th finger

239
Q

Abductor digiti minimi Action

A

Abducts 5th finger, assists in flexion of its proximal phalanx

240
Q

Abductor digiti minimi Innervation

A

Deep branch of ulnar nerve (C8, T1)

241
Q

Flexor digiti minimi Origin

A

Hook of hamate and flexor retinaculum

242
Q

Flexor digiti minimi Insertion

A

Medial side of base of proximal phalanx of 5th finger

243
Q

Flexor digiti minimi Action

A

Flexes proximal phalanx of 5th finger

244
Q

Flexor digiti minimi Innervation

A

Deep branch of ulnar nerve (C8, T1)

245
Q

Opponens digiti minimi Origin

A

Hook of hamate and flexor retinaculum

246
Q

Opponens digiti minimi Insertion

A

Medial border of 5th metacarpal

247
Q

Opponens digiti minimi Action

A

Draws 5th metacarpal anterior and rotates it, bringing 5th finger into opposition with thumb

248
Q

Opponens digiti minimi Innervation

A

Deep branch of ulnar nerve (C8, T1)

249
Q

Lumbricals 1-2 Origin

A

Lateral two tendons of flexor digitorum profundus (as unipennate muscles)

250
Q

Lumbricals 1-2 Insertion

A

Lateral sides of extensor expansions of 2nd – 5th fingers

251
Q

Lumbricals 1-2 Action

A

Flex metacarpophalangeal joints, extend interphalangeal joints of 2nd - 5th fingers

252
Q

Lumbricals 1-2 Innervation

A

Median nerve (C8, T1)

253
Q

Lumbricals 3-4 Origin

A

Medial three tendons of flexor digitorum profundus (as bipennate muscles)

254
Q

Lumbricals 3-4 Insertion

A

Lateral sides of extensor expansions of 2nd – 5th fingers

255
Q

Lumbricals 3-4 Action

A

Flex metacarpophalangeal joints, extend interphalangeal joints of 2nd - 5th fingers

256
Q

Lumbricals 3-4 Innervation

A

Deep branch of ulnar nerve (C8, T1)

257
Q

Dorsal interossei 1-4 Origin

A

Adjacent sides of two metacarpals (as bipennate muscles)

258
Q

Dorsal interossei 1-4 Insertion

A

Bases of proximal phalanges, extensor expansions of 2nd – 4th fingers

259
Q

Dorsal interossei 1-4 Action

A

Abduct 2nd – 4th fingers from axial line, act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

260
Q

Dorsal interossei 1-4 Innervaition

A

Deep branch of ulnar nerve (C8, T1)

261
Q

Palmer interossei 1-4 Origin

A

Palmar surfaces of 2nd, 4th, and 5th metacarpals (as unipennate muscles)

262
Q

Palmer interossei 1-4 Insertion

A

Bases of proximal phalanges, extensor expansions of 2nd , 4th , 5th fingers

263
Q

Palmer interossei 1-4 Action

A

Adduct 2nd , 4th , 5th fingers toward axial line, assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

264
Q

Palmer interossei 1-4 Innervation

A

Deep branch of ulnar nerve (C8, T1)

Human Anatomy (20 decks)

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