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Flashcards in Muscles Deck (134):
1

Deltoid origin

lateral 1/3 of the clavicle, acromion and spine of the scapula

2

Deltoid Insertion

Deltoid tuberosity

3

Deltoid Innervation

Axillary nerve (C5,C6)

4

Deltoid action

Anterior deltoid:Flexes and medially rotates
Middle Deltoid: Abduction
Posterior Deltoid: Extension and Laterally rotates

5

Supraspinatus origin

Supraspinous fossa

6

Supraspinatus Insertion

Superior Facet of greater tubercle

7

Supraspinatus Innervation

Suprascapular nerve(C4,C5,C6)

8

Supraspinatus Action

Abduction of arm

9

Infraspinatus Origin

Infraspinous fossa

10

Infraspinatus Insertion

Middle Facet of greater tubercle

11

Infraspinatus Innervation

Suprascapular nerve(C5,C6)

12

Infraspinatus Action

Lateral rotation

13

Teres Minor origin

Middle portion of lateral border of scapula

14

Teres Minor Insertion

Inferior Facet of greater tubercle

15

Teres Minor Innervation

Axillary Nerve(C5,C6)

16

Teres Minor Action

Lateral Rotation

17

Pectoralis Major Origin

Clavicular head: Medial half of the clavicle
Sternal head: Sternum, superior 6 costal cartliages and aponeurosis of external obliques

18

Pectoralis Major Insertion

Lateral lip of the intertubecular sulcus

19

Pectoralis Major Innervation

Medial and lateral Pectoral nerves:
Clavicular head: C5,C6
Sternal head: C7, C8, T1

20

Pectoralis Major Action

Adduction and medially rotate humerus, pulls scapula anteriorly and inferiorly

21

Pectoralis Minor Origin

3rd-5th ribs near costal cartilages

22

Pectoralis Minor Insertion

Medial and superior border of coracoid process

23

Pectoralis Minor Innervation

Medial Pectoral nerve C8 T1

24

Pectoralis Minor Action

Stabilization and draw scapula inferiorly and anteriorly to thoracic wall

25

Subclavius Origin

Junction of 1st rib and its costal cartilage

26

Subclavius Insertion

internal surface of middle third of clavicle

27

Subclavius Innervation

Nerve to subclavius C5,C6

28

Subclavius Action

Anchors and depresses clavicle

29

Serratus Anterior Origin

External Surface of 1-8th ribs

30

Serratus Anterior Insertion

Anterior Medial Border of scapula

31

Serratus Anterior Innervation

Long Thoracic Nerve(C5,C6,C7)

32

Serratus Anterior Action

Protraction and holds against thoracic wall, rotates scapula

33

Teres Major Origin

Posterior surface of inferior angle of scapula

34

Teres Major Insertion

Medial lip of intertubecular groove

35

Teres Major Innervation

Lower Subscapular Nerve(C5,C6)

36

Teres Major Action

Adducts and medial rotates

37

Subscapularis Origin

Subscapular fossa

38

Subscapularis Insertion

Lesser Tubercle

39

Subscapularis Innervation

Upper and Lower Subscapular nerve(C5,C6,C7)

40

Biceps Brachii Origin

Long Head: Supraglenoid Tubercle of Scapula
Short Head: tip of coracoid process of scapula

41

Biceps Brachii Insertion

Tuberosity of the radius and fascia via bicipital aponeurosis

42

Biceps Brachii Innervation

Musculocutaneous Nerve(C5, C6, C7)

43

Biceps Brachii Action

Supination and Flexion of the forearm

44

Coracobrachialis Origin

tip of th coracoid prosess

45

Coracobrachialis Insertion

Middle Medial shaft of the humerus

46

Coracobrachialis Innervation

Musculocutaneous Nerve(C5,C6,C7)

47

Coracobrachialis Action

Adduction and flexion

48

Brachialis Origin

Dital half of the anterior surface of humerus

49

Brachialis Insertion

Coronoid process and tuberosity of the ulna

50

Brachialis Innervation

Musculocutaneous Nerve(C5,C6,C7), Radial Nerve (C5,C6)

51

Brachialis Action

Flexes forearm in all postitions(main muscle for forearm flexion)

52

Triceps Brachii Origin

Long Head: Infraglenoid Tubercle of the scapula
Lateral Head: Posterior surface of humerus superior to the radial groove
Medial Head: posterior surface of humerus inferior to the radial groove

53

Triceps Brachii Insertion

Olecranon Process of ulna and fascia of forearm

54

Triceps Brachii Innervation

Radial Nerve(C6,C7,C8)

55

Triceps Brachii Action

Extension of the forearm

56

Anconeus Origin

Lateral epicondyle of humerus

57

Anconeus Insertion

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

58

Anconeus Innervation

Radial Nerve(C7, C8, T1)

59

Anconeus Action

Extends forearm, stabilize elbow joint and abduct ulna during pronation

60

Pronator Teres Origin

Ulnar Head: Coronoid Process
Humeral Head: Epicondyle of Humerus

61

Pronator Teres Insertion

medial convexity of lateral surface of the radius

62

Pronator Teres Innervation

Median Nerve(C6,C7)

63

Pronator Teres Action

Pronation and flexes forearm

64

Flexor Carpi Radialis Origin

Medial Epicondyle of humerus

65

Flexor Carpi Radialis Insertion

base of 2nd metacarpal

66

Flexor Carpi Radialis Innervation

Median Nerve(C6,C7)

67

Flexor Carpi Radialis Action

flexes hand and tenses palmer aponeurosis

68

Palmaris Longus Origin

Medial Epicondyle of humerus

69

Palmaris Longus Insertion

flexes and abducts hand

70

Palmaris Longus Innervation

Median Nerve(C7,C8)

71

Palmaris Longus Action

flexes hand and tenses the palmar aponeurosis

72

Flexor Carpi Ulnaris Origin

Humeral Head: Medial epicondyle of humerus
Ulnar head: Olecranon and posterior border

73

Flexor Carpi Ulnaris Insertion

Pisiform, Hook of hamate and 5th metacarpal

74

Flexor Carpi Ulnaris Innervation

Ulnar Nerve(C7,C8)

75

Flexor Carpi Ulnaris Action

Flex and adduct hand

76

Flexor Digitorum Superficialis Origin

Humeroulnar Head: Medial Epicondyle
Radial Head: Superior half of anterior border

77

Flexor Digitorum Superficialis Insertion

Shafts of middle phalanges of medial 4 digits

78

Flexor Digitorum Superficialis Innervation

Median Nerve(C7,C8,T1)

79

Flexor Digitorum Superficialis Action

Flexes middle phalanges at proximal interphalangeal joint of middle 4 digits; flexes proximal phalanges at metacarpophalangeal joints

80

Flexor Digitorum Profundus Origin

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

81

Flexor digitorum Profundus Insertion

Medial Part: Bases of distal phalanges of 4th and 5th digits
Lateral Part: Bases of distal phalanges of 2nd and 3rd digits

82

Flexor Digitorum Profundus Innervation

Medial: Ulnar nerve(C8,T1)
Lateral: Anterior interosseous Nerve(C8, T1)

83

Flexor digitorum Profundus Action

medial:flexes distal 4th and 5th phalanges interphalanges joint
Lateral:flexes distal 2nd and 3rd phalanges at interphalangeal joint

84

Flexor Pollicis Longus Origin

Anterior Surface of radius and adjacent interosseous membrane

85

Flexor Pollicis Longus Insertion

base of distal phalanx of thumb

86

Flexor Pollicis Longus Innervation

Anterior Interosseous nerve(C8,T1)

87

Flexor Pollicis Longus Action

Flexes phalanges of 1st digit

88

Pronator Quadratus Origin

distal 1/4 of anterior surface of the ulna

89

Pronator Quadratus Insertion

Distal 1/4 of the anterior surface of the radius

90

Pronator Quadratus Innervation

Anterior Interosseous Nerve(C8,T1)

91

Pronator Quadratus Action

Pronates forearm

92

Brachioradialis Origin

Proximal 2/3 of supraepicondylar ridge of humerus

93

Brachioradialis Insertion

Lateral surface of the distal end of the radius proximal to the styloid process

94

Brachioradialis Innervation

Radial Nerve(C5, C6, C7)

95

Brachioradialis Action

weak flexion of forearm

96

Extensor Carpi Radialis Longus Origin

Lateral supraepicondylar of humerus

97

Extensor Carpi Radialis Longus Insertion

Dorsal aspect of base of 2nd metacarpal

98

Extensor Carpi Radialis Longus Innervation

Radial Nerve(C6,C7)

99

Extensor Carpi Radialis Longus Action

Extend and abduct hand

100

Extensor Carpi Radialis Brevis Origin

Lateral epicondyle of humerus

101

Extensor Carpi Radialis Brevis Insertion

Dorsal aspect of base of 3rd metacarpal

102

Extensor Carpi Radialis Brevis Innervation

Deep Branch of radial nerve(C7,C8)

103

Extensor Carpi Radialis Brevis Action

Extend and abduct hand

104

Extensor Digitorum Origin

Lateral epicondyle of humerus

105

Extensor digitorum Insertion

Extensor expansions of medial 4 digits

106

Extensor Digitorum Innervation

deep branch of radial nerve(c7,C8)

107

Extensor digiti Minimi Origin

Lateral Epicondyle of humerus

108

Extensor Digiti Minimi Insertion

Extensor expansion of 5th digit

109

Extensor Digiti Minimi Innervation

Deep Branch of radial nerve(C7,C8)

110

Extensor Digiti Minimi Action

extends 5th digit primarily at metacarpophlangeal joint

111

Extensor Carpi Ulnaris Origin

Lateral epicondyle of humerus, posterior border of ulna

112

Extensor Carpi Ulnaris Insertion

Dorsal aspect of base of 5th metacarpal

113

Extensor Carpi Ulnaris Innervation

Deep Branch of the Radial Nerve(C7,C8)

114

Extensor Carpi Ulnaris Action

extends and adducts hand at wrist joint

115

Supinator Origin

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

116

Supinator Insertion

lateral posteriorand anterior surfaces of the proximal 1/3 of radius

117

Supinator Innervation

Deep Branch of Radial nerve(C7,C8)

118

Supinator Action

supinates forearm, rotates radius to turn palm anteriorly and superiorly

119

Extensor Indicis Origin

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

120

Extensor Indicis Insertion

Extensor Expansion of 2nd digit

121

Extensor Indicis Innervation

Posterior Interosseous Nerve(C7,C8)

122

Extensor Indicis Action

extends 2nd digit and hand

123

Abductor Pollicis Longus Origin

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

124

Abductor Pollicis Longus Insertion

Base of 1st metacarpal

125

Abductor Pollicis Longus Innervation

Posterior Interosseous Nerve(C7,C8)

126

Abductor Pollicis Longus Action

abduct thumbs and extends at the carpometaparal joint

127

Extensor Pollicis Longus Origin

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

128

Extensor Pollicis Longus Insertion

dorsal aspect of base of distal phalanx of thumb

129

Extensor Pollicis Longus Innervation

Posterior Interosseous Nerve(C7,C8)

130

Extensor Pollicis Longus Action

extends distal phalanx of thumb at interphalangeal joint, extend metacarpophalangeal and carpometacarpal joint

131

Extensor Pollicis Brevis Origin

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

132

Extensor Pollicis Brevis Insertion

dorsal aspect of base of proximal phalanx of thumb

133

Extensor Pollicis Brevis Innervation

Posterior Interosseous Nerve (C7, C8)

134

Extensor Pollicis Brevis Action

extends proximal phalanx of thumb at metacarpophalngeal joint, extends carpometacarpal joint