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Origin of Supraspinatus

Supraspinous fossa of scapula

1

Insertion of Supraspinatus

Superior facet of greater tubercle of humerus

2

Innervation of Supraspinatus

Suprascapular nerve (C4, C5 (main), C6)

3

Action of Supraspinatus

Initiates and assists deltoid I'm abduction of shoulder joint and acts with other rotator cuff muscles

4

Origin infraspinatus

Infraspinatus fossa of scapula

5

Insertion infraspinatus

Middle facet of greater tubercle of humerus

6

Innervation of infraspinatus

Suprascapular nerve (C5 (main), C6)

7

Main action of infraspinatus

1. Laterally rotate shoulder joint
2. Help hold humerus in glenoid cavity of scapula

8

Origin: Teres Minor

Middle border of the lateral border of the scapula

9

Insertion: Teres Minor

Inferior Facet of the greater tubercle of the humerus

10

Innervation: Teres Minor

Axillary Nerve (C5 and C6)

11

Main Action: Teres Minor

1. Laterally rotates shoulder joint
2. Helps hold humeral head in glenoid cavity of scapula

12

Origin: Teres Major

1. Inferior part of the lateral border of the scapula
2. Posterior surface of inferior angle of scapula

13

Insertion: Teres Major

Medial lip of intertubercular sulcus of humerus

14

Innervation: Teres Major

Lower subscapular nerve (C5 and C6)

15

Main Action: Teres Major

Adducts and medially rotates shoulder joint

16

Origin: Subscapularis

Subscapularis fossa of the scapula

17

Insertion: Subscapularis

Lesser tubercle of humerus

18

Innervation: Subscapularis

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

19

Main Action: Subscapularis

1. Medially rotates and adducts shoulder joint
2. Helps hold humeral head in glenoid cavity

20

Origin: Deltoid

1. Lateral 1/3 of the clavicle
2. Acromion
3. Spine of the scapula

21

Insertion: Deltoid

Deltoid tuberosity of the humerus

22

Innervation: Deltoid

Axillary nerve (C5 and C6)

23

Action: Deltoid

Clavicular part: medial rotation
Acromial part: abduction
Spinous part: lateral rotation

24

Origin: Pectoralis Major

1. Clavicular Head: Anterior surface of the middle half of the clavicle
2. Sternocostal Head: Anterior surface of the sternum, superior 6 costal cartilages, and aponeurosis of external oblique muscles

25

Insertion: Pectoralis Major

Lateral lip of the intertubercular groove of the humerus

26

Innervation: Pectoralis Major

Lateral and medial pectoral nerve:
1. Clavicular Head: C5 and C6
2. Sternocostal Head: C7, C8, and T1

27

Main Action: Pecotralis Major

1. Adducts and medially rotates shoulder joint, draws scapula anteriorly and inferiorly
2. Acting alone, Clavicular head flexes shoulder joint and sternocostal head extends it from the flexed position

28

Origin: Pectoralis Minor

3rd-5th ribs near their costal cartilages

29

Insertion: Pectoralis Minor

1. Medial border of scapula
2.superior surface of coracoid process of scapula

30

Innervation: Pectoralis Minor

Medial pectoral nerve (C8 and T1)

31

Main Action: Pectoralis Minor

Stabilizes the scapula by drawing inferiorly and anteriorly against thoracic wall

32

Origin: Subclavius

Junction of the 1st rib and its costal cartilage

33

Insertion: Subclavius

Inferior surface if middle 3rd of clavicle

34

Innervation: Subclavius

Subclavian nerve (C5 and C6)

35

Main Action: Subclavius

Anchors and depresses clavicle

36

Origin: Serratus Anterior

External surfaces of lateral parts of ribs 1-8

37

Insertion: Serratus Anterior

Anterior surface of medial border of scapula

38

Innervation: Serratus Anterior

Long Thoracic nerve (C5- C7)

39

Main Action: Serratus Anterior

1. Protects scapula and holds against thoracic wall
2. Rotates Scapula

40

Origin: Brachioradialis

Proximal 2/3 of lateral supraepicondylar ridge of humerus

41

Insertion: Brachioradialis

Distal end of radius proximal to styloid process

42

Innervation: Brachioradialis

Radial nerve (C5-C7)

43

Main Action: Brachioradialis

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

44

Origin: Extensor Carpi Radialis Longus

Lateral supra-epicondylar ridge of humerus

45

Insertion: Extensor Carpi Radialis Longus

Dorsal aspect of base of 2nd metacarpal

46

Innervation: Extensor Carpi Radialis Longus

Radial nerve (C6 and C7)

47

Main Action: Extensor Carpi Radialis Longus

Extends and abducts wrist joint and is active during fist clenching

48

Origin: Extensor Carpi Radialis Brevis

Lateral epicondyle of humerus (common extensor origin)

49

Insertion: Extensor Carpi Radialis Brevis

Dorsal aspect of 3rd metacarpal

50

Innervation: Extensor Carpi Radialis Brevis

Deep branch of radial nerve (C7 and C8)

51

Main Action: Extensor Carpi Radialis Brevis

Extend and abduct wrist joint and is active during fist clenching

52

Origin: Extensor Digitorum

Lateral epicondyle of humerus

53

Insertion: Extensor Digitorum

Extensor expansions of medial 4 fingers

54

Innervation: Extensor Digitorum

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

55

Main Action: Extensor Digitorum

1. Extend wrist joint
2. Extends medial 4 fingers primarily at metacarpophalangeal joints and secondarily at interphalangeal joints

56

Origin: Extensor Digiti Minimi

Lateral epicondyle of humerus

57

Insertion: Extensor Digiti Minimi

Extensor expansion of 5th finger

58

Innervation: Extensor Digiti Minimi

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

59

Main Action: Extensor Digiti Minimi

1. Extends wrist joint
2. Extends 5th finger primarily at metacarpophalangeal joint and secondarily at interphalangeal joint

60

Origin: Extensor Carpi Ulnaris

1. Lateral epicondyle of humerus
2. Posterior border of ulna

61

Insertion: Extensor Carpi Ulnaris

Dorsal aspect of base of 5th metacarpal

62

Innervation: Extensor Carpi Ulnaris

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

63

Main Action: Extensor Carpi Ulnaris

Extends and adducts wrist joint and is also active during fist clenching

64

Origin: Supinator

1. Lateral epicondyle of humerus
2. Radial Collateral and Anular Ligaments
3. Supinator Fossa
4. Crest of Ulna

65

Insertion: Supinator

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

66

Innervation: Supinator

Deep branch of radial nerve (C7 and C8)

67

Main Action: Supinator

1. Supinates forearm
2. Rotates radius to turn palm anteriorly or superiorly if elbow is flexed

68

Origin: Abductor Pollicis Longus

Proximal halves of ulna, radius, and interosseous membrane

69

Insertion: Abductor Pollicis Longus

Base of 1st metacarpal

70

Innervation: Abductor Pollicis Longus

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

71

Main Action: Abductor Pollicis Longus

1. Extends wrist joint
2. Abducts thumb and extends it at carpometacarpal joint

72

Origin: Extensor Pollicis Longus

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

73

Insertion: Extnsor Pollicis Longus

Dorsal aspect of base of distal phalanx of thumb

74

Innervation: Extensor Pollicis Longus

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

75

Main Action: Extensor Pollicis Longus

1. Extends wrist joint
2. Extends distal phalanx of thumb at interphalangeal joint
3. Extends metacarpophalangeal and carpometacarpal joints

76

Origin: Extensor Pollicis Brevis

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

77

Insertion: Extensor Pollicis Brevis

Dorsal aspect of base of proximal phalanx of thumb

78

Innervation: Extensor Pollicis Brevis

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

79

Main Action: Extensor Pollicis Brevis

1. Extends wrist joint
2. Extends proximal phalanx of thumb at metacarpophalangeal joint
3. Extends Carpometacarpal joint

80

Origin: Extensor Indicis

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

81

Insertion: Extensor Indicis

Extensor expansion of 2nd finger

82

Innervation: Extensor Indicis

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

83

Main Action: Extensor Indicis

1. Extends wrist joint
2. Extends 2nd finger enabling its independent extension
3. Helps extend hand at wrist

84

Origin: Biceps Brachii

Short Head: tips of coracoid process of scapula
Long Head: supra glenoid tubercle of scapula

85

Insertion: Biceps Brachii

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

86

Innervation: Biceps Brachii

Musculocutaneous Nerve (C5 and C6)

87

Main Action: Biceps Brachii

1. Supinates forearm and when it is Supinates flexes elbow joint
2. Flexes shoulder joint
3. Short head resists dislocation of shoulder

88

Origin: Brachialis

Distal half of anterior surface of humerus

89

Insertion: Brachialis

Coronoid process and tuberosity of ulna

90

Innervation: Brachialis

Musculocutaneous nerve (C5 and C6)

91

Main Action: Brachialis

Flexes elbow joint in all positions

92

Origin: Coracobrachialis

Tip of coracoid process of scapula

93

Insertion: Coracobrachialis

Middle 1/3 of medial surface of humerus

94

Innervation: Coracobrachialis

Musculocutaneous Nerve (C5-C7)

95

Main Action: Coracobrachialis

1. Helps flex and adduct shoulder joint
2. Resists dislocation of shoulder

96

Origin: Triceps Brachii

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

97

Insertion: Triceps Brachii

Proximal end of olecranon of ulna and fascia of forearm

98

Innervation: Triceps Brachii

Radial Nerve (C6-C8)

99

Main Action: Triceps Brachii

1. Chief extensor of elbow joint
2. Long head extends to shoulder joint and resists dislocation of humerus- important during abduction

100

Origin: Pronator Teres

1. Ulnar Head: coronoid process of ulna
2. Humeral Head: medial epicondyle of humerus

101

Insertion: Pronator Teres

Middle of convexity of lateral surface of radius

102

Innervation: Pronator Teres

Median nerve (C6 and C7)

103

Main Action: Pronator Teres

Pronate and flexes forearm

104

Origin: Flexor Carpi Radialis

Medial epicondyle of humerus

105

Insertion: Flexor Carpi Radialis

Base of 2nd (3rd) metacarpal

106

Innervation: Flexor Carpi Radialis

Median Nerve (C6 and C7)

107

Main Action: Flexor Carpi Radialis

Flexes and abducts hand at wrist

108

Origin: Palmaris Longus

Medial epicondyle of humerus

109

Insertion: Palmaris Longus

1. Distal half of flexor retinaculum
2. Palmar aponeurosis

110

Innervation: Palmaris Longus

Median Nerve (C7 and C8)

111

Main Action: Palmaris Longus

Flexes hand at wrist and tenses palmar aponeurosis

112

Origin: Flexor Carpi Ulnaris

Olecranon and posterior border of ulna

113

Insertion: Flexor Carpi Ulnaris

1. Pisiform
2. Hook of hamate
3. 5th metacarpal

114

Innervation: Flexor Carpi Ulnaris

Ulnar Nerve ( C7 and C8)

115

Main Action: Flexor Carpi Ulnaris

Flexes and adducts hand at wrist

116

Origin: Flexor Digitorum Superficialis

1. Humero-ulnar Head: medial epicondyle of humerus and coronoid process of ulna
2. Radial Head: oblique line of radius

117

Insertion: Flexor Digitorum Superficialis

Shaft of middle phalanges of medial 4 digits

118

Innervation: Flexor Digitorum Superficicalis

Median Nerve (C7-T1)

119

Main Action: Fexor Digitorum Superficialis

1. Flexes wrist joint
2. Flexes proximal interphalangeal joints of middle 4 digits
3. Flexes proximal phalanges at metacarpophalangeal joint

120

Origin: Flexor Digitorum Profundus

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

121

Insertion: Flexor Digitorum Profundus

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

122

Innervation: Flexor Digitorum Profundus

1. Lateral part (to digits 2 and 3): Median nerve (C8 and T1)
2. Medial part (to digits 4 and 5): Ulnar nerve (C8 and T1)

123

Main Action: Flexor Digitorum Profundus

1. Flexes wrist joint
2. Flexes distal interphalangeal joints of digits 2-5
3. Assists with wrist flexion

124

Origin: Flexor Pollicis Longus

Anterior surface of radius and adjacent interosseous membrane

125

Insertion: Flexor Pollicis Longus

Base of distal phalanx of thumb

126

Innervation: Flexor Pollicis Longus

Anterior interosseous nerve from medial nerve (C8 and T1)

127

Main Action: Flexor Pollicis Longus

1. Flexes wrist
2. Flexes metacarpophalangeal joint and interphalangeal joint of the thumb

128

Origin: Pronator Quadratus

Distal quarter of anterior surface of ulna

129

Insertion: Pronator Quadratus

Distal quarter of anterior surface of radius

130

Innervation: Pronator Quadratus

Anterior interosseous nerve from median nerve (C8 and T1)

131

Main Action: Pronator Quadratus

1. Pronator forearm
2. Deep fibers bind radius and ulna together

132

Origin: Opponens Pollicis

Flexor Retinaculum and tubercles of scaphoid and trapezium

133

Insertion: Opponens Pollicis

Lateral side of 1st metacarpal

134

Innervation: Opponens Pollicis

Recurrent branch of median nerve (C8 and T1)

135

Main Action: Opponens Pollicis

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

136

Origin: Abductor Pollicis Brevis

Flexor retinaculum and tubercles of scaphoid and trapezium

137

Insertion: Abductor Pollicis Brevis

Base of proximal phalanx of thumb

138

Innervation: Abductor Pollicis Brevis

Recurrent branch of median nerve (C8 and T1)

139

Main Action: Abductor Pollicis Brevis

Abducts thumb and helps oppose it

140

Origin: Adductor Pollicis (Oblique Head and Transverse Head)

1. Bases of 2nd and 3rd metacarpals, capitate, and adjacent carpals
2. Anterior surface of shaft of 3rd metacarpal

141

Insertion: Adductor Pollicis (Oblique Head and Transverse Head)

Base of proximal phalanx of thumb

142

Innervation: Adductor Pollicis (Oblique Head and Transverse Head)

Deep branch of ulnar nerve (C8 and T1)

143

Main Action: Adductor Pollicis (Oblique Head and Transverse Head)

Adducts thumb toward lateral border of palm

144

Origin: Flexor Pollicis Brevis (Superficial Head and Deep Head)

Flexor retinaculum and tubercles of scaphoid and trapezium

145

Insertion: Flexor Pollicis Brevis (Superficial Head and Deep Head)

Lateral side of base of proximal phalanx of thumb

146

Innervation: Flexor Pollicis Brevis (Superficial Head and Deep Head)

1. Superficial head: Recurrent branch of median nerve (C8 and T1)
2. Deep head: Deep branch of ulnar nerve (C8 and T1)

147

Main Action: Flexor Pollicis Brevis (Superficial Head and Deep Head)

Flexes thumb

148

Origin: Abductor Digiti Minimi

Pisiform

149

Insertion: Abductor Digiti Minimi

Medial side of proximal phalanx of 5th finger

150

Innervation: Abductor Digiti Minimi

Deep branch of ulnar nerve (C8 and T1)

151

Main Action: Abductor Digiti Minimi

Abducts 5th finger and assists in Flexion of its proximal phalanx

152

Origin: Flexor Digiti Minimi Brevis

Hook of hamate and flexor retinaculum

153

Insertion: Flexor Digiti Minimi Brevis

Base of proximal phalanx of 5th finger

154

Main Action: Flexor Digiti Minimi Brevis

Flexes proximal phalanx of 5th finger

155

Origin: Opponens Digiti Minimi

Hook of hamate and flexor retinaculum

156

Insertion: Opponens Digiti Minimi

Medial border of 5th metacarpal

157

Main Action: Opponens Digiti Minimi

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

158

Innervation: Opponens Digiti Minimi

Deep Branch of ulnar nerve (C8 and T1)

159

Origin: Lumbricals 1 and 2

Lateral 2 tendons of flexor Digitorum Profundus

160

Insertion: Lumbricals 1 and 2

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

161

Innervation: Lumbricals 1 and 2

Median nerve (C8 and T1)

162

Main Action: Lumbricals 1 and 2

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

163

Origin: Lumbricals 3 and 4

Medial 3 tendons of flexor Digitorum Profundus

164

Insertion: Lumbricals 3 and 4

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

165

Innervation: Lumbricals 3 and 4

Median nerve (C8 and T1)

166

Main Action: Lumbricals 3 and 4

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

167

Origin: Dorsal Interossei 1-4

Adjacent sides of 2 metacarpals

168

Insertion: Dorsal Interossei 1-4

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

169

Innervation: Dorsi Interossei 1-4

Deep branch of ulnar nerve (C8 and T1)

170

Main Action: Dorsal Interossei 1-4

Abduct 2nd-4th fingers from axial line and act with Lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

171

Origin: Palmer Interossei 1-3

Palmar surfaces of 2nd, 4th, and 5th metacarpals

172

Insertion: Palmar Interossei 1-3

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

173

Innervation: Palmar Interossei 1-3

Deep branch of ulnar nerve (C7 and T1)

174

Main Action: Palmar Interossei 1-3

Adduct 2nd, 4th, and 5th fingers towards axial line and assist Lumbricals in flexing metacarpophalangeal joint and extending interphalangeal joints

175

Innervation: Flexor Digiti Minimi Brevis

Deep branch of ulnar nerve (C8 and T1)