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Anatomy > Scapula and Upper Extremity > Flashcards

Scapula and Upper Extremity Flashcards

1
Q

Deltoid origin (proximal)

A

Lateral 1/3 of clavicle, lateral acromion, inferior edge spine of scapula

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2
Q

Deltoid insertion (distal)

A

Deltoid tuberosity of humerus

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3
Q

Deltoid innervation

A

Axillary nerve (originates from brachial plexus - C5/C6)

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4
Q

Deltoid action

A

Clavicular: flexes and medially rotates arm
Acromial: abducts beyond 15 degrees
Spinal: extends and laterally rotates arm

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5
Q

Deltoid blood supply

A

Posterior circumflex humeral artery, deltoid branch of thoraco-acromial artery

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6
Q

Supraspinatus origin (proximal)

A

Supraspinatus fossa of scapula

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7
Q

Supraspinatus insertion (distal)

A

Inferior facet of greater tubercle of humerus

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8
Q

Supraspinatus innervation

A

Suprascapular nerve (brachial plexus - C5/C6)

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9
Q

Supraspinatus action

A

Initiates arm abduction up to 15 degrees (rotator cuff)

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10
Q

Supraspinatus blood supply

A

Suprascapular artery

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11
Q

Infraspinatus origin (proximal)

A

Infraspinatus fossa of scapula

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12
Q

Infraspinatus insertion (distal)

A

Middle facet of greater tubercle of humerus

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13
Q

Infraspinatus innervation

A

Suprascapular nerve

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14
Q

Infraspinatus blood supply

A

Suprascapular artery

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15
Q

Infraspinatus action

A

Lateral rotation of arm (rotator cuff)

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16
Q

Teres major origin

A

Posterior surface of inferior angle of scapula

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17
Q

Teres major insertion

A

Medial lip of intertubercular sulcus of humerus

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18
Q

Teres major innervation

A

Lower subscapular nerve (brachial plexus C5/C6)

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19
Q

Teres major action

A

Adducts and medially rotates arm

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20
Q

Teres major blood supply

A

Circumflex scapular artery

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21
Q

Teres minor origin

A

Upper 2/3 of posterior surface of lateral border of scapula

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22
Q

Teres minor insertion

A

Inferior facet of greater tubercle of humerus

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23
Q

Teres minor innervation

A

Axillary nerve (brachial plexus C5/C6)

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24
Q

Teres minor action

A

Laterally rotates arm (rotator cuff)

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25
Q

Teres minor blood supply

A

Circumflex scapular artery

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26
Q

Subscapularis origin

A

Subscapular fossa (anterior portion of scapula)

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27
Q

Subscapularis insertion

A

Lesser tubercle of humerus

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28
Q

Subscapularis innervation

A

Upper and lower subscapular nerves (brachial plexus C5/C6)

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29
Q

Subscapularis action

A

Medially rotates and adducts arm at shoulder, holds humeral head in glenoid cavity

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30
Q

Subscapularis blood supply

A

Subscapular artery, lateral thoracic artery

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31
Q

Pectoralis major origin

A

Medial clavicle and anterior surface of sternum

32
Q

Pectoralis major insertion

A

Lateral lip of intertubercular sulcus

33
Q

Pectoralis major innervation

A

Lateral pectoral nerve (C5-T1) and medial pectoral nerve (C8-T1)

34
Q

Pectoralis major action

A

Adducts and medially rotates shoulder joint

35
Q

Pectoralis major blood supply

A

Pectoral branch of thoraco-acromial artery

36
Q

Pectoralis minor origin

A

Ribs 3-5 near costal cartilage

37
Q

Pectoralis minor insertion

A

Superomedial border of coracoid process

38
Q

Pectoralis minor innervation

A

Medial pectoral nerve (C8-T1)

39
Q

Pectoralis minor action

A

Stabilizes scapula

40
Q

Pectoralis minor blood supply

A

Pectoral branch of thoraco-acromial artery

41
Q

Serratus anterior origin

A

Lateral parts of ribs 1-8

42
Q

Serratus anterior insertion

A

Anterior surface medial border of scapula

43
Q

Serratus anterior innervation

A

Long thoracic nerve (C5-C7)

44
Q

Serratus anterior action

A

Holds scapula against thoracic wall

45
Q

Serratus anterior blood supply

A

Superior and lateral thoracic artery

46
Q

Biceps brachii long head origin

A

Supraglenoid tubercle of scapula

47
Q

Biceps brachii long head insertion

A

Radial head tuberosity

48
Q

Biceps brachii innervation

A

Musculocutaneous nerve (C5-C7)

49
Q

Biceps brachii action

A

Supinates forearm, flexion at shoulder joint, flexes elbow joint

50
Q

Biceps brachii blood supply

A

Muscular branches brachial artery

51
Q

Brachialsis origin

A

Distal half anterior surface of humerus

52
Q

Brachialis insertion

A

Coronoid process and ulnar tuberosity

53
Q

Brachialis innervation

A

Musculocutaneous nerve (C5-C7)

54
Q

Brachialis action

A

Flexes elbow joint/forearm

55
Q

Brachialis blood supply

A

Radial recurrent artery, muscular branches of brachial artery

56
Q

Coracobrachialis origin

A

Coracoid process of scapula

57
Q

Coracobrachialis insertion

A

Middle portion of medial humerus

58
Q

Coracobrachialis innervation

A

Musculocutaneous nerve (C5-C7)

59
Q

Coracobrachialis action

A

Flexion and adduction shoulder

60
Q

Coracobrachialis blood supply

A

Muscular branches brachial artery

61
Q

Triceps brachii long head (LH) origin

A

(located medial to short head) originates on infraglenoid tubercle of scapula

62
Q

Triceps brachii long head insertion

A

Olecranon process of ulna

63
Q

Triceps brachii LH innervation

A

Radial Nerve

64
Q

Triceps brachii LH action

A

extension and adduction of shoulder, extension of shoulder joint

65
Q

Triceps brachii LH blood supply

A

deep brachial artery

66
Q

Triceps brachii short head (SH) origin

A

posterolateral humerus proximal to radial groove

67
Q

Triceps brachii SH insertion

A

olecranon process of ulna

68
Q

Triceps brachii SH innervation

A

Radial nerve

69
Q

Triceps brachii action

A

extension of elbow joint/forearm

70
Q

Triceps brachii blood supply

A

deep brachial artery

71
Q

Triceps brachii medial head (MH) origin

A

posteromedial surface of humerus

72
Q

Triceps brachii MH insertion

A

Olecranon process of ulna

73
Q

Triceps brachii MH innervation

A

Radial nerve

74
Q

Triceps brachii MH action

A

extension of elbow/forearm

75
Q

Triceps brachii MH blood supply

A

deep brachial artery

Anatomy (2 decks)

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