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Gross Anatomy > Unit 2 > Flashcards

Unit 2 Flashcards

1
Q

Brachioradialis Origin

A

Proximal 2/3 of lateral supra-epicondylar ridge of humerus

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2
Q

Brachioradialis Insertion

A

Lateral surface of distal end of radius proximal to styloid process

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3
Q

Brachioradialis Innervation

A

Radial Nerve (C5, C6, C7)

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4
Q

Brachioradialis Action

A

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

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5
Q

Extensor carpi radialis longus Origin

A

Lateral supra-epicondylar ridge of humerus

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6
Q

Extensor carpi radialis longus Insertion

A

Dorsal aspect of base of 2nd metacarpal

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7
Q

Extensor carpi radialis longus Innervation

A

Radial Nerve (C6, C7)

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8
Q

Extensor carpi radialis longus Action

A

Extend and abduct wrist joint

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9
Q

Extensor carpi radialis brevis Origin

A

Lateral epicondyle of humerus

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10
Q

Extensor carpi radialis brevis Insertion

A

Dorsal aspect of base of 3rd metacarpel

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11
Q

Extensor carpi radialis brevis Innervation

A

Deep branch of radial nerve (C7, C8)

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12
Q

Extensor carpi radialis brevis Action

A

Extend and abduct wrist joint; active during fist clenching

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13
Q

Extensor Digitorum Origin

A

Lateral epicondyle of humerus

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14
Q

Extensor Digitorum Insertion

A

Extensor expansions of medial four fingers

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15
Q

Extensor Digitorum Innervation

A

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

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16
Q

Extensor Digitorum Action

A

Extend wrist joint; extend medial four fingres primarily at metacarpopholangeal joints, secondarily at interphalangeal joints

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17
Q

Extensor digiti minimi Origin

A

Lateral epicondyle of humerus

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18
Q

Extensor digiti minimi Insertion

A

Extensor expansion of 5th finger

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19
Q

Extensor digiti minimi Innervation

A

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

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20
Q

Extensor digiti minimi Action

A

Extends wrist joint; extends 5th finger primarily at metacarpophalangeal joints, secondarily at interphalangeal joint

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21
Q

Extensor carpi ulnaris Origin

A

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

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22
Q

Extensor carpi ulnaris Insertion

A

Dorsal aspect of base of 5th metacarpal

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23
Q

Extensor carpi ulnaris Innervation

A

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

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24
Q

Extensor carpi ulnaris Action

A

Extends and adducts wrist joint (also active during fist clenching)

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25
Q

Supinator Origin

A

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

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26
Q

Supinator Insertion

A

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

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27
Q

Supinator Innervation

A

Deep branch of radial nerve (C7, C8)

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28
Q

Supinator Action

A

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

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29
Q

Abductor pollicis longus Origin

A

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

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30
Q

Abductor pollicis longus Insertion

A

Base of 1st metacarpal

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31
Q

Abductor pollicis longus Innervation

A

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

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32
Q

Abductor pollicis longus Action

A

Extends wrist joint; abducts thumb and extends it at carpometacarpal joint

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33
Q

Extensor pollicis longus Origin

A

Posterior surface of middle third of ulna and interosseous membrane

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34
Q

Extensor pollicis longus Insertion

A

Dorsal aspect of base of distal phalanx of thumb

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35
Q

Extensor pollicis longus Innervation

A

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

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36
Q

Extensor pollicis longus Action

A

Extends wrist joint; extends distal phalanx of thumb at interphalangeal joint; extends metacarpophalangeal and carpometacarpal joints

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37
Q

Extensor pollicis brevis Origin

A

Posterior surface of distal third of radius and interosseous membrane

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38
Q

Extensor pollicis brevis Insertion

A

Dorsal aspect of base of proximal phalanx of thumb

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39
Q

Extensor pollicis brevis Innervation

A

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

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40
Q

Extensor pollicis brevis Action

A

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

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41
Q

Extensor indicis Origin

A

Posterior surface of distal third of ulna and interosseous membrane

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42
Q

Extensor indicis Insertion

A

Extensor expansion of 2nd finger

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43
Q

Extensor indicis Innervation

A

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

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44
Q

Extensor indicis Action

A

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

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45
Q

Pronator Teres Origin

A

Ulnar head: coronoid process of ulna

Humeral head: medial epicondyle of humerus

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46
Q

Pronator Teres Insertion

A

Middle of convexity of lateral surface of radius

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47
Q

Pronator Teres Innervation

A

Median nerve (C6, C7)

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48
Q

Pronator Teres Action

A

Pronates and flexes forearm

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49
Q

Flexor carpi radialis Origin

A

Medial epicondyle of humerus

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50
Q

Flexor carpi radialis Insertion

A

Base of 2nd (3rd) metacarpal

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51
Q

Flexor carpi radialis Innervation

A

Median nerve (C6, C7)

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52
Q

Flexor carpi radialis Action

A

Flexes and abducts hand at wrist

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53
Q

Palmaris longus Origin

A

Medial epicondyle of humerus

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54
Q

Palmaris longus Insertion

A

Distal half of flexor retinaculum, palmar aponeurosis

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55
Q

Palmaris longus Innervation

A

Median nerve (C7, C8)

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56
Q

Palmaris longus Action

A

Flexes hand (at wrist) and tenses palmar aponeurosis

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57
Q

Flexor carpi ulnaris Origin

A

Ulnar head: olecranon and posterior border of ulna (via aponeurosis)

Humeral head: medial epicondyle of humerus

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58
Q

Flexor carpi ulnaris Insertion

A

Pisiform, hook of hamate, 5th metacarpal

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59
Q

Flexor carpi ulnaris Innervation

A

Ulnar nerve (C7, C8)

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60
Q

Flexor carpi ulnaris Action

A

Flexes and adducts hand at wrist

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61
Q

Flexor digitorum superficialis Origin

A

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

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62
Q

Flexor digitorum superficialis Insertion

A

Shafts of middle phalanges of medial four digits

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63
Q

Flexor digitorum superficialis Innervation

A

Median nerve (C7, C8, T1)

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64
Q

Flexor digitorum superficialis Action

A

Flexes wrist joint; flexes proximal interphalangeal joints of middle four digits; acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

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65
Q

Flexor digitorum profundus Origin

A

Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

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66
Q

Flexor digitorum profundus Insertion

A

Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits

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67
Q

Flexor digitorum profundus Innervation

A 
Lateral part (to digits 2 and 3): median nerve (C8, T1) (anterior interosseous branch)
Medial part (to digits 4 and 5): ulnar nerve (C8, T1)
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68
Q

Flexor digitorum profundus Action

A

Flexes wrist joint; flexes distal interphalangeal joints of digits 2, 3, 4, and 5; assists in wrist flexion

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69
Q

Flexor pollicis longus Origin

A

Anterior surface of radius and adjacent interosseous membrane

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70
Q

Flexor pollicis longus Insertion

A

Base of distal phalanx of thumb

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71
Q

Flexor pollicis longus Innervation

A

Anterior interosseous nerve, from median nerve (C8, T1)

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72
Q

Flexor pollicis longus Action

A

Flexes wrist; flexes metacarpophalangeal and interphalangeal joints of thumb

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73
Q

Pronator quadratus Origin

A

Distal quarter of anterior surface of ulna

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74
Q

Pronator quadratus Insertion

A

Distal quarter of anterior surface of radius

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75
Q

Pronator quadratus Innervation

A

Anterior interosseous nerve, from median nerve (C8, T1)

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76
Q

Pronator quadratus Action

A

Pronates forearm; deep fibers bind radius and ulna together

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77
Q

Opponens pollicis Origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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78
Q

Opponens pollicis Insertion

A

Lateral side of 1st metacarpal

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79
Q

Opponens pollicis Innervation

A

Recurrent branch of median nerve (C8, T1)

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80
Q

Opponens pollicis Action

A

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

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81
Q

Abductor pollicis brevis Origin

A

Flexor retinaculum and tubercles of scaphoid and trapzium

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82
Q

Abductor pollicis brevis Insertion

A

Lateral side of base of proximal phalanx of thumb

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83
Q

Abductor pollicis brevis Innervation

A

Recurrent branch of median nerve (C8, T1)

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84
Q

Abductor pollicis brevis Action

A

Abducts thumb; helps oppose it

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85
Q

Flexor pollicis brevis Origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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86
Q

Flexor pollicis brevis Insertion

A

Lateral side of base of proximal phalanx of thumb

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87
Q

Flexor pollicis brevis Innervation

A

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

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

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88
Q

Flexor pollicis brevis Action

A

Flexes thumb

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89
Q

Adductor pollicis Origin

A

Oblique head: bases of 2nd and 3rd metacarpals, capitate, adjacent carpals
Transverse head: surface of shaft of 3rd metacarpal

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90
Q

Adductor pollicis Insertion

A

Medial side of base of proximal phalanx of thumb

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91
Q

Adductor pollicis Innervation

A

Deep branch of ulnar nerve (C8, T1)

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92
Q

Adductor pollicis Action

A

Adducts thumb toward lateral border of palm

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93
Q

Abductor digiti minimi Origin

A

Pisiform

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94
Q

Abductor digiti minimi Insertion

A

Medial side of base of proximal phalanx of 5th finger

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95
Q

Abductor digiti minimi Innervation

A

Deep branch of ulnar nerve (C8, T1)

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96
Q

Abductor digiti minimi Action

A

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

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97
Q

Flexor digiti minimi brevis Origin

A

Hook of hamate and flexor retinaculum

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98
Q

Flexor digiti minimi brevis Insertion

A

Medial side of base of proximal phalanx of 5th finger

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99
Q

Flexor digiti minimi brevis Innervation

A

Deep branch of ulnar nerve (C8, T1)

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100
Q

Flexor digiti minimi brevis Action

A

Flexes proximal phalanx of 5th finger

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101
Q

Opponens digiti mini Origin

A

Hook of hamate and flexor retinaculum

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102
Q

Opponens digiti mini Insertion

A

Medial border of 5th metacarpal

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103
Q

Opponens digiti mini Innervation

A

Deep branch of ulnar nerve (C8, T1)

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104
Q

Opponens digiti mini Action

A

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

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105
Q

Lumbricals Origin

A

1 and 2: lateral two tendons of flexor digitorum profundus (as unipennate muscles)
3 and 4: medial three tendons of flexor digitorum profundus (as bipenate muscles)

106
Q

Lumbricals Insertion

A

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

107
Q

Lumbricals Innervation

A

1 and 2: Median nerve (C8, T1)

3 and 4: Deep branch of ulnar nerve (C8, T1)

108
Q

Lumbricals Action

A

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

109
Q

Dorsal interossei, 1-4 Origin

A

Adjacent sides of 2 metacarpals (as bipennate muscles)

110
Q

Dorsal interossei, 1-4 Insertion

A

Bases of proximal phalanges; extensor expansions of 2nd-4th fingers

111
Q

Dorsal interossei, 1-4 Innervation

A

Deep branch of ulnar nerve (C8, T1)

112
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

113
Q

Palmar inerossei, 1-3 Origin

A

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

114
Q

Palmar inerossei, 1-3 Insertion

A

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

115
Q

Palmar inerossei, 1-3 Innervation

A

Deep branch of ulnar nerve (C8, T1)

116
Q

Palmar inerossei, 1-3 Action

A

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

117
Q

External Intercostal Origin

A

Inferior border of ribs

118
Q

External Intercostal Insertion

A

Superior border of ribs

119
Q

External Intercostal Innervation

A

Intercostal nerve

120
Q

External Intercostal Action

A

During forced insipiration: elevates ribs

121
Q

Internal Intercostal Origin

A

Superior border of ribs

122
Q

Internal Intercostal Insertion

A

Inferior border of ribs

123
Q

Internal Intercostal Innervation

A

Intercostal nerve

124
Q

Internal Intercostal Action

A

During forced respiration: interosseus part depresses ribs: interchondral part elevates ribs

125
Q

Innermost Intercostal Origin

A

Inferior border of ribs

126
Q

Innermost Intercostal Insertion

A

Superior border of ribs

127
Q

Innermost Intercostal Innervation

A

Intercostal nerve

128
Q

Innermost Intercostal Action

A

During forced respiration: interosseus part depresses ribs: interchondral part elevates ribs

129
Q

Transversus Thoracis Origin

A

Posterior surface of lower sternum

130
Q

Transversus Thoracis Insertion

A

Internal surface of costal cartilages 2-6

131
Q

Transversus Thoracis Innervation

A

Intercostal nerve

132
Q

Transversus Thoracis Action

A

Weakly depresses ribs

133
Q

External Oblique Origin

A

External surfaces of 5th-12th ribs

134
Q

External Oblique Insertion

A

Linea alba, pubic tubercle, and anterior half of illiac crest

135
Q

External Oblique Innervation

A

Thoraco-abdominal nerves (anterior rami of T7-T11) and subcostal nerve

136
Q

External Oblique Action

A

Compress and support abdominal viscera; flex and rotate trunk

137
Q

Internal Oblique Origin

A

Thoracolumbar fascia, anterior two thirds of illiac crest, and connective tissue deep to inguinal ligament

138
Q

Internal Oblique Insertion

A

Inferior borders of 10th-12th ribs, linea alba, and pubis via conjoint tendon

139
Q

Internal Oblique Innervation

A

Thoraco-abdominal nerves (anterior rami of T7-T11), subcostal and first lumbar nerve

140
Q

Internal Oblique Action

A

Compress and support abdominal viscera; flex and rotate trunk

141
Q

Transversus Abdominis Origin

A

Internal surfaces of 7th-12th rcostal cartilages, thoracolumbar fascia, illiac crest, and connective tissue deep to inguinal ligament

142
Q

Transversus Abdominis Insertion

A

Linea alba with aponeurosis of internal oblique, pubic crest, and pubis via conjoint tendon

143
Q

Transversus Abdominis Innervation

A

Thoraco-abdominal nerves (anterior rami of T7-T11), subcostal and first lumbar nerve

144
Q

Transversus Abdominis Action

A

Compresses and supports abdominal viscera

145
Q

Rectus Abdominis Origin

A

Pubic symphysis and pubic crest

146
Q

Rectus Abdominis Insertion

A

Xiphoid process of 5th-7th costal cartilages

147
Q

Rectus Abdominis Innervation

A

Thoraco-abdominal and subcostal nerves (anterior rami of T7-T12 spinal nerves)

148
Q

Rectus Abdominis Action

A

Flexes trunk (lumbar vertebrae) and compresses abdominal viscera, stabilizes and controls tilt of pelvis (antilordosis)

149
Q

Psoas Major Origin

A

Transverse processes of lumbar vertebrae; sides of bodies of T12-S1 vertebrae and intervening IV discs

150
Q

Psoas Major Insertion

A

By a strong tendon to lesser trochanter of femur

151
Q

Psoas Major Innervation

A

Lumbar plexus via anterior branches of nerves L2-L4

152
Q

Psoas Major Action

A

Acting inferiorly with iliacus, flexes thigh; acting superiorly, flexes vertebral column laterally to balance the trunk; when sitting, acts inferiorly with iliacus to flex trunk

153
Q

Iliacus Origin

A

Superior two thirds of iliac fossa, ala of sacrum, and anterior sacro-illiac ligaments

154
Q

Iliacus Insertion

A

Lesser trochanter of femur and shaft inferior to it and to psoas major tendon

155
Q

Iliacus Innveration

A

Femoral Nerve (L2-L4)

156
Q

Iliacus Action

A

Flexes thigh and stabilizes hip joint; acts with psoas major

157
Q

Quadratus Lumborum Origin

A

Medial half of inferior border of 12th rib and tips of lumbar transverse processes

158
Q

Quadratus Lumborum Insertion

A

Illiolumbar ligament and internal lip of illiac crest

159
Q

Quadratus Lumborum Innervation

A

Anterior branches of T12 and L1-L4 nerves

160
Q

Quadratus Lumborum Action

A

Extends and laterally flexes vertebral column; fixes 12th rib during inspiration

161
Q

Psoas Minor Origin

A

T12-L1 vertbrae and IV discs

162
Q

Psoas Minor Insertion

A

Pectineal line and illiopoectineal eminence

163
Q

Psoas Minor Innervation

A

Lumbar plexus via anterior branches of nerves L2-L4

164
Q

Psoas Minor Action

A

Acting inferiorly with iliacus, flexes thigh; acting superiorly, flexes vertebral column laterally to balance the trunk; when sitting, acts inferiorly with iliacus to flex trunk

165
Q

Obturator Internus Origin

A

Pelvic surface of illium and ischium; obturator membrane

166
Q

Obturator Internus Insertion

A

Greater trochanter of femur

167
Q

Obturator Internus Innervation

A

Nerve to obturator internus (L5, S1, S2)

168
Q

Obturator Internus Action

A

Laterally rotates hip joint; assists in holding head of femur in acetabulum

169
Q

Piriformis Origin

A

Pelvic surface of 2nd-4th sacral segments; superior margin of greater sciatic notch and sacrotuberous ligament

170
Q

Piriformis Insertion

A

Greater trochanter of femur

171
Q

Piriformis Action

A

Laterally rotates hip joint; abducts hip joint; assists in holding head of femur in acetabulum

172
Q

Piriformis Innervation

A

Anterior rami of S1 and S2

173
Q

Piriformis Action

A

Laterally rotates hip joint; abducts hip joint; assists in holding head of femur in acetabulum

174
Q

Levator Ani (pubococcygeous and illiococcygeus) Origin

A

Body of pubis, tendinous arch of levator ani, ischial spine

175
Q

Levator Ani (pubococcygeous and illiococcygeus) Insertion

A

Perineal body, cocyx, anococcygeal ligament, walls of prostate or vagina, rectum, anal canal

176
Q

Levator Ani (pubococcygeous and illiococcygeus) Innervation

A

Nerve to levator ani (branches of S4), inferior anal (rectal) nerve, cocygeal plexus

177
Q

Levator Ani (pubococcygeous and illiococcygeus) Action

A

Helps support pelvic visceral; resists increases in intra-abdominal pressure

178
Q

Coccygeus (ischiococcygeus) Origin

A

Ischial spine

179
Q

Coccygeus (ischiococcygeus) Insertion

A

Inferior end of sacrum and coccyx

180
Q

Coccygeus (ischiococcygeus) Innervation

A

Branches of S4 and S5 nerves

181
Q

Coccygeus (ischiococcygeus) ACtion

A

Forms small part of pelvic diaphragm that supports pelvic viscera; flexes coccyx

182
Q

Gluteus Maximus Origin

A

Illium posterior to posterior gluteal line dorsal surface of sacrum and coccyx; scarotberous ligament

183
Q

Gluteus Maximus Insertion

A

Most fibers end in illiotibial tract, which inserts into lateral condyle of tibia; some fibers insert on gluteal tuberosity of femur

184
Q

Gluteus Maximus Innervation

A

Inferior gluteal nerve (L5, S1, S2)

185
Q

Gluteus Maximus Action

A

Extends hip joint between flexed and standing positions and assists in its lateral rotation; steadies thigh and assists in rising from sitting position

186
Q

Gluteus Medius Origin

A

External surface of ilium between anterior and posterior gluteal lines

187
Q

Gluteus Medius Insertion

A

Lateral surface of greater trochanter of femur

188
Q

Gluteus Medius Innervation

A

Superior gluteal nerve (L4, L5, S1)

189
Q

Gluteus Medius Action

A

Abduct and anterior portions medially rotate hip joint; keep pelvis level when opposite limb is elevated

190
Q

Gluteus Minimus Origin

A

External surface of illium between anterior and inferior gluteal lines

191
Q

Gluteus Minimus Insertion

A

Anterior surface of greater trochanter of femur

192
Q

Gluteus Minimus Innervation

A

Superior gluteal nerve (L4, L5, S1)

193
Q

Gluteus Minimus Action

A

Abduct and anterior portions medially rotate hip joint; keep pelvis level when opposite limb is elevated

194
Q

Tensor Fasciae Latae Origin

A

Anterior superior iliac spine; anterior part of iliac crest

195
Q

Tensor Fasciae Latae Insertion

A

Illiotibial tract, which attaches to lateral condyle of tibia (Gerdy’s tubercle)

196
Q

Tensor Fasciae Latae Innervation

A

Superior gluteal nerve (L4, L5, S1)

197
Q

Tesnor Fasciae Latae Action

A

Flexes hip joint; acts with gluteus maximus to stabilize extended knee joint

198
Q

Gemelli superior and inferior Origin

A

Superior: Ischial spine
Inferior: Ischial tuberosity

199
Q

Gemelli superior and inferior Insertion

A

Medial surface of greater trochanter of femur

200
Q

Gemelli superior and inferior Innervation

A

Superior: nerve to obturator internus (L5, S1)
Inferior: nerve to quadratus femoris (L5, S1)

201
Q

Gemelli superior and inferior Action

A

Laterally rotate exteneded hip joint; abduct flexed hip joint; steady femoral head in acetabulum (stabilizes hip joint)

202
Q

Quadratus Femoris Origin

A

Lateral border of ischial tuberosity

203
Q

Quadratus Femoris Insertion

A

Quadrate tubercle on intertrochanteric crest of femur and area inferior to it

204
Q

Quadratus Femoris Innervation

A

Nerve to quadratus femoris (L5, S1)

205
Q

Quadratus Femoris Action

A

Laterally rotates hip joint; also pulls femoral head into acetabulum to stabilize hip joint/pelvis

206
Q

Semitendinosus Origin

A

Ischial tuberosity

207
Q

Semitendinosus Insertion

A

Medial surface of superior part of tibia

208
Q

Semitendinosus Innervation

A

Tibial division of sciatic nerve (L5, S1, S2)

209
Q

Semitendinosus Action

A

Extend hip joint; flex knee joint and rotate the leg medially when knee is flexed; when hip and knee are flexed, can extend trunk

210
Q

Semimembranosus Origin

A

Ischial Tuberosity

211
Q

Semimembranosus Insertion

A

Posterior part of medial condyle of tibia; reflected attachment forms oblique popliteal ligament

212
Q

Semimembranosus Innervation

A

Tibial division of sciatic nerve (L5, S1, S2)

213
Q

Semimembranosus Action

A

Extend hip joint; flex knee joint and rotate the leg medially when knee is flexed; when hip and knee are flexed, can extend trunk

214
Q

Biceps femoris Origin

A

Long head: Ischial tuberosity

Short head: Linea aspera and lateral supracondylar line of femur

215
Q

Biceps femoris Insertion

A

Lateral side of head of fibula; tendon is split at this site by fibular collateral ligament of knee

216
Q

Biceps femoris Innervation

A

Long head: tibial division of sciatic nerve (L5, S1, S2)

Short head: common fibular division of sciatic nerve (L5, S1, S2)

217
Q

Biceps femoris Action

A

Flexes knee joint and rotates it laterally when knee is flexed; extends hip joint

218
Q

Pectineus Origin

A

Superior ramus of pubis

219
Q

Pectineus Insertion

A

Pectineal line of femur, just inferior to lesser trochanter

220
Q

Pectineus Innervation

A

Femoral Nerve (L2, L3); may receive branch from obturator nerve

221
Q

Pectineus Action

A

Adducts and flexes hip joint; assists with medial rotation of hip joint

222
Q

Sartorius Origin

A

Anterior superior illiac spiceand superior part of notch inferior to it

223
Q

Sartorius Insertion

A

Superior part of medial surface of tibia

224
Q

Sartorius Innervation

A

Femoral Nerve (L2, L3)

225
Q

Sartorius Action

A

Flexes, abducts, and laterally rotates hip joint; flexes knee joint

226
Q

Rectus Femoris Origin

A

Anterior inferior illiac spine and ilium superior to acetabulum

227
Q

Rectus Femoris Insertion

A

Quadriceps tendon

228
Q

Rectus Femoris Innervation

A

Femoral Nerve (L2, L3, L4)

229
Q

Rectus Femoris Action

A

Extends knee joint; stabilizes hip joint and helps iliopsoas flex hip joint

230
Q

Vastus Lateralis Origin

A

Greater trochanter and lateral lip of linea aspera

231
Q

Vastus Lateralis Insertion

A

Quadriceps tendon, tibia and patella via aponeuroses

232
Q

Vastus Lateralis Innervation

A

Femoral Nerve (L2, L3, L4)

233
Q

Vastus Lateralis Action

A

Extends knee joint

234
Q

Vastus Medialis Origin

A

Intertrochanteric line and medial lip of linea aspera

235
Q

Vastus Medialis Insertion

A

Quadriceps tendon, tibia and patella via aponeuroses

236
Q

Vastus Medialis Innervation

A

Femoral Nerve (L2, L3, L4)

237
Q

Vastus Intermedius Origin

A

Anterior and lateral surfaces of shaft of femur

238
Q

Vastus Intermedius Insertion

A

Quadriceps tendon

239
Q

Vastus Intermedius Innervation

A

Femoral Nerve (L2, L3, L4)

240
Q

Vastus Intermedius Action

A

Extends knee joint

241
Q

Adductor Longus Origin

A

Body of pubis inferior to pubic crest

242
Q

Adductor Longus Insertion

A

Middle third of linea aspera of femur

243
Q

Adductor Longus Innervation

A

Obturator Nerve (L2, L3, L4)

244
Q

Adductor Longus Action

A

Adducts hip joint

245
Q

Adductor Brevis Origin

A

Body and inferior ramus of pubis

246
Q

Adductor Brevis Insertion

A

Pectineal line and proximal part of linea aspera of femur

247
Q

Adductor Brevis Innervation

A

Obturator Nerve (L2, L3, L4)

248
Q

Adductor Brevis Action

A

Adductss hip joint and to some extend flexes it

249
Q

Adductor Magnus Origin

A

Adductor part: inferior ramus of pubis, ramus of ischium

Hamstring part: ischial tuberosity

250
Q

Adductor Magnus Insertion

A

Adductor part: gluteal tuberosity, linea apsera, medial supracondylar line
Hamstring part: adductor tubercle of femur

251
Q

Adductor Magnus Innervation

A

Adductor part: obturator nerve (L2, L3, L4)

Hamstring part: tibial part of sciatic nerve (L4)

252
Q

Adductor Magnus Action

A

Adducts hip joint; its adductor part also flexes hip joint, and its hamstring part extends it

253
Q

Gracilis Origin

A

Body and inferior ramus of pubis

254
Q

Gracilis Insertion

A

Superior part of medial surface of tibia

255
Q

Gracilis Innervation

A

Obturator nerve (L2, L3)

256
Q

Gracilis Action

A

Adducts hip joint; flexes knee joint and helps rotate it medially

257
Q

Obturator Externus Origin

A

Margins of obturator foramen and obturator membrane

258
Q

Obturator Externus Insertion

A

Trochanteric fossa of femur

259
Q

Obturator Externus Innervation

A

Obturator Nerve (L3, L4)

260
Q

Obturator Externus Action

A

Laterally rotates hip joint; pulls head of femur into acetabulum holding pelvis steady

Gross Anatomy (3 decks)

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