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EXCI 253 > Muscles and innervation of shoulder girdle and upper extremity > Flashcards

Muscles and innervation of shoulder girdle and upper extremity Flashcards

1
Q

I of Pectoralis major

A

Greater tubercule and lateral lip of intertubercular groove of humerus

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2
Q

O clavicular head of Pectoralis Major m.

A

Medial clavicle

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3
Q

O of sternal head of Pectoralis major m.

A

Sternum and costal cartilages of ribs 2-6

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4
Q

Action of Pectoralis major m.

A

Flexion, Medial rotation and adduction of humerus

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5
Q

Innervation of Pectoralis major m.

A

Medial and lateral pectoral n.

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6
Q

O of Pectoralis minor m.

A

Ribs 2-5 (sometimes 3-5 or 2-4) near their costal cartilages

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7
Q

I of Pectoralis minor m.

A

Coracoid process of Scapula

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8
Q

Action of Pectoralis minor m.

A

Abduction, downward rotations of scapula & assists in elevation of ribs when pectoral girdle is fixed

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9
Q

Innervation of Pectoralis minor m.

A

Medial pectoral n.

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10
Q

O of Subclavius m.

A

1st rib

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11
Q

I of Subclavius m.

A

Subclavian groove of Clavicle

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12
Q

Action of Subclavius m.

A

Depress clavicle

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13
Q

Innervation of subclavius m.

A

Subclavian n.

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14
Q

O of Serratus anterior m.

A

Ribs 1-8 (sometimes 1-9)

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15
Q

I of Serratus anterior m.

A

Medial border & inferior angle of scapula

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16
Q

Action of Serratus anterior m.

A

Abduction & upward rotation of Scapula (protraction)

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17
Q

Innervation of Serratus anterior m.

A

Long thoracic n.

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18
Q

O of Serratus posterior superior m.

A

Ligament nuchea & spinous processes of C7-T3 vertebrae

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19
Q

I of Serratus posterior superior m.

A

Superior border of ribs 2 to 4

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20
Q

Action of Serratus posterior superior m.

A

Elevation of ribs

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21
Q

Innervation of Serratus posterior superior m.

A

2-5 intercostal n.

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22
Q

O of Serratus posterior inferior m.

A

Spinous processes of T11-L12 vertebrae

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23
Q

I of Serratus posterior inferior m.

A

Inferior borders of ribs 8-12 near their angles

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24
Q

Action of Serratus posterior inferior m.

A

Depression of ribs

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25
Q

Innervation of Serratus posterior inferior m.

A

9-12 thoracic n.

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26
Q

O of Trapezius m.

A

Occipital bone, ligamentum nuchea & spinous processes of C7-T12

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27
Q

I of Trapezius m.

A

Lateral 1/3 of clavicle, spine and acromion of scapula

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28
Q

Action of superior fibers of Trapezius m.

A

Upward rotation of scapula, can also extend head

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29
Q

Action of middle fibers of Trapezius m.

A

Adduction of scapula (retraction)

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30
Q

Action of inferior fibers of Trapezius m.

A

Depression & upward rotation of scapula

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31
Q

Innervation of Trapezius m.

A

Accessory n. (CN XI) and cervical spinal n. C3-C5

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32
Q

O of Latissimus dorsi m.

A

Spinous processes of T7-L5, Sacral crest, iliac crest and inferior 4 ribs

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33
Q

I of Latissimus dorsi m.

A

Floor of intertubercular groove of humerus b.

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34
Q

Action of Latissimus dorsi m.

A

Extension, adduction and medial rotation of humerus

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35
Q

Innervation of Latissimus dorsi m.

A

Thoracodorsal n.

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36
Q

O of Levator scapulae m.

A

Transverse processes of C1-C4

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37
Q

I of Levator scapulae m.

A

Upper 1/3 of medial border of scapulae

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38
Q

Action of Levator scapulae m.

A

Elevation & Downward rotation of the scapula

39
Q

Innervation of Levator Scapulae m.

A

Dorsal scapular n. and cervical n. C3-C5

40
Q

O of Rhomboid major m.

A

Spinous process of T2-T5

41
Q

I of Rhomboid major m.

A

Lower 1/3 of medial border of scapula

42
Q

Action of Rhomboid major m.

A

Elevation, adduction & downward rotation of scapula; stabilizes scapula

43
Q

Innervation of Rhomboid major m.

A

Dorsal scapular n.

44
Q

O of Rhomboid minor m.

A

Spinous processes of C7-T1

45
Q

I of Rhomboid minor m.

A

Medial border of scapula superior to spine

46
Q

Action of Rhomboid minor m.

A

Elevation, adduction & downward rotation of scapula; stabilizes scapula

47
Q

Innervation of Rhomboid minor m.

A

Dorsal scapular n.

48
Q

O of Deltoid m.

A

Lateral 1/3 of clavicle, acromion and spine of scapula

49
Q

I of Deltoid m.

A

Deltoid tuberosity of humerus

50
Q

Action of anterior fibers of Deltoid m.

A

Flexion & medial rotation of humerus

51
Q

Action of lateral fibers of Deltoid m.

A

Adbuction of humerus

52
Q

Action of posterior fibers of Deltoid m.

A

Extension & lateral rotation of humerus

53
Q

Innervation of Deltoid m.

A

Axillary n.

54
Q

O of Surpraspinatus m.

A

Supraspinous fossa of scapula

55
Q

I of Supraspinatus m.

A

Greater tubercule of humerus

56
Q

Action of Supraspinatus m.

A

Assists deltoid m. in abduction of humerus at shoulder jnt

57
Q

Innervation of Supraspinatus m.

A

Suprascapular n.

58
Q

O of Infraspinatus m.

A

Infraspinous fossa of scapula

59
Q

I of Infraspinatus m.

A

Greater tubercule of humerus

60
Q

Action of Infraspinatus m.

A

Lateral rotation of humerus at shoulder jnt.

61
Q

Innervation of Infraspinatus m.

A

Suprascapular n.

62
Q

O of Teres minor m.

A

Inferior lateral border of scapula

63
Q

I of Teres minor m.

A

Greater tubercule of Humerus

64
Q

Action of Teres minor m.

A

Lateral rotation of humerus at shoulder jnt

65
Q

Innervation of Teres minor m.

A

Axillary n.

66
Q

O of Teres major m.

A

Inferior angle of Scapula

67
Q

I of Teres major m.

A

Medial lip of intertubercular groove of Humerus

68
Q

Action of Teres major m.

A

Extends and assists in adduction & medial rotation of humerus at shoulder jnt.

69
Q

Innervation of Teres major m.

A

Lower subscapular n.

70
Q

O of Subscapularis m.

A

Subscapular fossa of scapula

71
Q

I of Subscapularis m.

A

Lesser tubercle of humerus

72
Q

Action of Subscapularis m.

A

Medial rotation of Humerus at shoulder jnt

73
Q

Innervation of Subscapularis m.

A

Upper & Lower subscapular n.

74
Q

Rotator cuff muscles

A

Supraspinatus m. ; Infraspinatus m. ; Teres minor m. ; Subscapularis m.

75
Q

O of the long head of Biceps brachii m.

A

Supraglenoid tubercle of scapula

76
Q

I of Biceps brachii m.

A

Radial tuberosity of radius & deep fascia of forearm via bicipital aponeuroseus

77
Q

Action of Biceps brachii m.

A

Flexion of forearm at elbow jnt., supination of the forearm at radio-ulnar jnt., flexion of humerus at shoulder jnt.

78
Q

Innervation of Biceps brachii m.

A

Musculocutaneous n.

79
Q

O of the short head of Biceps brachii m.

A

Coracoid process of the scapula

80
Q

O of Brachialis m.

A

Distal anterior surface of humerus

81
Q

I of Brachialis m.

A

Ulnar tuberosity and corocoid process of ulna

82
Q

Action of Brachialis m.

A

Flexion of forearm at elbow jnt

83
Q

Innervation of Brachialis m.

A

Musculocutenous n. & radial n.

84
Q

O of Coracobrachialis m.

A

Coracoid process of scapula

85
Q

I of Coracobrachialis m.

A

Middle 1/3 of medial surface of shaft of humerus

86
Q

Action of Coracobrachialis m.

A

Flexion & adduction of humerus at shoulder jnt.

87
Q

Innervation of COracobrachialis m.

A

Musculocutaneous n.

88
Q

O of long head of Triceps Brachii m.

A

Infraglenoid tubercle of scapula

89
Q

O of lateral head of Triceps Brachii m.

A

Lateral and posterior surface of humerus, above radial groove

90
Q

O of medial head of Tricpes Brachii m.

A

Posterior surface of humerus, below radial groove

91
Q

I of Triceps brachii m.

A

Olecranon process of ulna

92
Q

Action of Triceps Brachii m.

A

Extension of humerus at shoulder jnt, & extension of forearm at elbow jnt.

93
Q

Innervation of Triceps brachii m.

A

Radial n.

EXCI 253 (14 decks)

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