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Muscles > Shoulder > Flashcards

Shoulder Flashcards

1
Q

Deltoid origin

A

Lateral third of clavicle; acromion; spine of scapula

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2
Q

Deltoid insertion

A

Deltoid tuberosity on the humerus

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3
Q

Deltoid innervation

A

Axillary nerve (C5,6) from posterior cord of brachial plexus

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4
Q

Deltoid action

A

Abduction of humerus;
Anterior fibers- assist in flexion;
Posterior fibers- assist in extension

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5
Q

Supraspinatus origin

A

Supraspinous fossa of the scapula

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6
Q

Supraspinatus insertion

A

Superior facet of greater tubercle of humerus

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7
Q

Supraspinatus innervation

A

Suprascapular nerve C5,6

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8
Q

Supraspinatus action

A

Initiates abduction of arm

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9
Q

Infraspinatus origin

A

Infraspinous fossa

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10
Q

Infraspinatus insertion

A

Middle facet of greater tubercle of humerus

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11
Q

Infraspinatus innervation

A

Suprascapular C5,C6

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12
Q

Infraspinatus action

A

Rotates humerus laterally

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13
Q

Teres major origin

A

Lower lateral border and inferior angle of the scapula

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14
Q

Teres major insertion

A

Crest of lesser tubercle and medial lip of intertubercular sulcus of humerus

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15
Q

Teres major action

A

Adducts and medially rotates the humerus. Assists with extension of the arm.

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16
Q

Teres major innervation

A

Lower subscapular nerve C5, C6

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17
Q

Teres minor origin

A

Lateral border of Scapula

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18
Q

Teres minor insertion

A

Inferior facet of the greater tubercle of the humerus

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19
Q

Teres minor action

A

Rotates humerus laterally and weakly adducts humerus

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20
Q

Teres minor innervation

A

Axillary C5,6

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21
Q

Subscapular origin

A

Subscapular fossa

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22
Q

Subscapular insertion

A

Lesser tubercle of humerus

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23
Q

Subscapular action

A

Medially rotates humerus

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24
Q

Subscapular innervation

A

Upper and lower subscapular nerve C5, C6

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25
Q

Biceps brachii origin

A

Long head: supraglenoid tubercle of humerus

Short head: coracoid process

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26
Q

Biceps brachii insertion

A

Tuberosity of radius and the bicipital aponeurosis

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27
Q

Biceps brachii action

A

Flexes and supinates the forearm

Long head: assists in flexing the humerus

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28
Q

Biceps brachii innervation

A

Musculocutaneous C5, C6

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29
Q

Brachialis origin

A

Distal half of anterior surface of the humerus

30
Q

Brachialis insertion

A

Tuberosity of the ulna and anterior surface of the coronoid process

31
Q

Brachialis action

A

Flexor of the forearm

32
Q

Brachialis innervation

A

Musculocutaneous nerve C5, C6

33
Q

Coracobrachialis origin

A

Coracoid process of scapula

34
Q

Coracobrachialis insertion

A

Middle third of medial surface of humerus

35
Q

Coracobrachialis action

A

Flexes and adducts the arm

36
Q

Coracobrachialis innervation

A

Musculocutaneous nerve C6, C7

37
Q

Triceps Brachii origin

A

Long head: infraglenoid tubercle of the scapula
Lateral head: posterior surface and lateral border of the humerus; and the lateral intermuscular septum
Medial head: posterior surface and medial border of the humerus; and the medial intermuscular septum

38
Q

Triceps Brachii Insertion

A

Posterior part of the olecranon process of the ulna; and the deep fascia of the dorsal forearm

39
Q

Triceps Brachii Action

A

Extend the forearm at the elbow joint

Long head: Extends the humerus at the shoulder joint

40
Q

Triceps Brachii Innervation

A

Radial Nerve C7 C8

41
Q

Pectoralis Major Origin

A

Medial half of clavicle, first six ribs and sternum

42
Q

Pectoralis Major Insertion

A

Humerus, lateral lip of intertubercular sulcus

43
Q

Pectoralis Major Action

A

Adducts and medially rotates arm;
Sternal part: extends humerus
Clavicular part: flex humerus

44
Q

Pectoralis Major innervation

A

Lateral Pectoral C5, C6, C7 and medial pectoral C8, T1

45
Q

Pectoralis Minor Origin

A

Ribs 2-5

46
Q

Pectoralis Minor Insertion

A

Coracoid Process

47
Q

Pectoralis Minor Action

A

Protracts scapula (abduction), depress scapula, elevate ribs during forced inhalation

48
Q

Pectoralis Minor Innervation

A

Medial pectoral nerve C8, T1

49
Q

Subclavius Origin

A

First rib and cartilage

50
Q

Subclavius Insertion

A

Inferior surface of middle third of clavicle

51
Q

Subclavius Action

A

Depress clavicle and stabilize S/C joint

52
Q

Subclavius Innervation

A

Subclavian nerve C5, C6

53
Q

Pectoralis major Blood Supply

A

Pectoral branch of the thoracoacromial trunk

54
Q

Pectoralis Minor Blood Supply

A

Pectoral branch of the thoracoacromial trunk

55
Q

Serratus Anterior Blood Supply

A

Lateral thoracic artery

56
Q

Subscapularis blood supply

A

Subscapular artery

57
Q

Deltoid Blood supply

A

Posterior circumflex humeral artery

58
Q

Supraspinatus blood supply

A

Suprascapular artery

59
Q

Infraspinatus blood supply

A

Suprascapular artery

60
Q

Teres Major blood supply

A

Subscapular and circumflex scapular artery

61
Q

Teres Minor blood supply

A

Subscapular and circumflex scapular artery

62
Q

Biceps brachii blood supply

A

Brachial artery

63
Q

Brachialis blood supply

A

Brachial artery

64
Q

Coracobrachialis blood supply

A

Brachial artery

65
Q

Triceps brachii blood supply

A

Deep brachial a

66
Q

Subclavian Blood Supply

A

Clavicular branch of thoracoacromial artery

67
Q

Serratus Anterior Origin

A

Upper 9 ribs

68
Q

Serratus Anterior Insertion

A

Medial border of scapula

69
Q

Serratus Anterior Action

A

Protracts and rotates scapula, holds to thoracic wall

70
Q

Serratus Anterior Innervation

A

Long Thoracic (C5, C6, C7)

Muscles (9 decks)

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