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(J) Muscles > Shoulder Complex and Brachial Muscles > Flashcards

Shoulder Complex and Brachial Muscles Flashcards

1
Q

What is the proximal attachment of the trapezius?

A

External Occipital Protuberance

Superior Nuchal Line

Ligamentum Nuchae

Spinous process; CV7, TV1-12

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2
Q

What is the distal attachment of the trapezius?

A

Lateral 1/3 of clavicle

Acromion and crest of scapular spine

Tubercle of scapular spine

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3
Q

What innervates the trapezius?

A

CN XI (accessory nerve)

Ventral Rami C3-C4

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4
Q

What is the blood supply of the trapezius?

A

Dorsal Scapular Artery

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5
Q

What are the actions of the trapezius?

A

Elevates, depresses scapula, adducts, and upwardly rotates

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6
Q

What is the proximal attachment of lattisimus dorsi?

A

Spines of TV7-12

Lumbar/sacral vertebrae via thoracolumar fascia

Posterior iliac crest

Ribs 9-12

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7
Q

What is the distal attachment of the lattisimus dorsi?

A

Floor of intertubercular (bicipital) groove

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8
Q

What are the actions of the lattisimus dorsi?

A

Extends, adducts, and internally rotates humerus

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9
Q

What innervates the lattisimus dorsi?

A

Thoracodorsal nerve

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10
Q

What is the blood supply for the lattisimus dorsi?

A

Subscapular artery via the the throacodorsal artery

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11
Q

What is the proximal attachment for the levator scapulae?

A

Transverse process of CV1-4

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12
Q

What is the distal attachment for the levator scapulae?

A

Medial border of scapula at and above the spine

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13
Q

What are the actions of the levator scapulae?

A

Elevates scapula at superior angle

Assists in external/downward rotation

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14
Q

What innervates the levator scapulae?

A

C3-C5 (Dorsalscapular Nerve for C5)

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15
Q

What is the blood supply for the levator scapulae?

A

Dorsal scapular artery

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16
Q

What is the proximal attachment for the rhomboids?

A

Ligementum nuchae

Spines of CV7, TV1-4

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17
Q

What is the distal attachment of the rhomboids?

A

Medial border of scapula from spine to the inferior angle

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18
Q

What are the actions of the rhomboids?

A

Adducts scapula

External/downward rotation of glenoid fossa

Fixes scapula to thoracic wall

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19
Q

What innervates the rhomboids?

A

Dorsal scapular nerve

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20
Q

What is the blood supply of the rhomboids?

A

Dorsal scapular artery

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21
Q

What is the proximal attachment of the teres major?

A

Posterior inferior angle of scapula

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22
Q

What is the distal attachment of the teres major?

A

Medial lip of intertubercular (bicipital) groove

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23
Q

What are the action of the teres major?

A

Adducts and medically rotates the humerus

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24
Q

What innervates the teres major?

A

Lower subscapular nerve

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25
Q

What is the blood supply of the teres major?

A

Circumflex scapular artery

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26
Q

What is the proximal attachment of the teres minor?

A

Middle of the lateral border of the scapula

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27
Q

What is the distal attachment of the teres minor?

A

Inferior facet of the greater tubercle

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28
Q

What are the actions of the teres minor?

A

Laterally rotates humerus

Fixes head of humerus

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29
Q

What innervates the teres minor?

A

Axillary nerve

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30
Q

What is the blood supply of the teres minor?

A

Circumflex scapular artery

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31
Q

What is the proximal attachment of subclavius?

A

Junction of 1st rib and costal cartilage

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32
Q

What is the distal attachment of the subclavius?

A

Inferior surface of middle 1/3 of clavicle

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33
Q

What are the actions of the subclavius?

A

Anchors/depresses scapula

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34
Q

What innervates the subclavius?

A

Nerve to subclavius

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35
Q

What is the blood supply of the subclavius?

A

Subclavian artery

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36
Q

What is the proximal attachment of the pectoralis major?

A

Anteromedical surface of clavicle

Anterior manubrium and sternum

Costal cartilage 2-6

Aponeurosis of external obliques

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37
Q

What is the distal attachment of the pectoralis major?

A

Lateral lip of intertubercular (bicipital) groove

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38
Q

What are the actions of pectoralis major?

A

Adducts and medially rotates humerus

Flexes arm

Extends arm from flexed position

Draws scapular anteriorly and inferiorly

39
Q

What innervates the pectoralis major?

A

Lateral and medial pectoral nerves

40
Q

What is the blood supply of the pectoralis major?

A

Pectoral branch of the thoracoacromial artery

41
Q

What is the proximal attachment of the pectoralis minor?

42
Q

What is the distal attachment of the pectoralis minor?

A

Coracoid process

43
Q

What are the actions of the pectoralis minor?

A

Draws scapula inferiorly against thoracic wall (stabilizes)

44
Q

What innervates the pectoralis minor?

A

Medial pectoral nerve

45
Q

What is the blood supply of the pectoralis minor?

A

Pectoral branch of the thoracoacromial artery

46
Q

What is the proximal attachment of the serratus anterior?

A

External lateral parts of ribs 1-8(9)

47
Q

What is the distal attachment of the serratus anterior?

A

Anterior medial surface of scapula

48
Q

What are the actions of the serratus anterior?

A

Rotates, protracts, and fixes scapula to thoracic wall

49
Q

What innervates the serratus anterior?

A

Long thoracic nerve

50
Q

What is the blood supply of the serratus anterior?

A

Lateral thoracic artery

51
Q

What is the proximal attachment of the biceps brachii?

A

Supraglenoid tubercle (long head)

Coracoid process of scapula (short head)

52
Q

What is the distal attachment biceps brachii?

A

Posterior border of bicipital tuberosity of the radius

Bicipital aponeurosis

53
Q

What are the actions of the biceps brachii?

A

Supinate forearm

Flexes elbow

Assist in humeral flexion

54
Q

What innervates the biceps brachii?

A

Musculocutaneous nerve

55
Q

What is the blood supply of the biceps brachii?

A

Muscular branch of brachial artery

56
Q

What is the proximal attachment of triceps brachii?

A

Infraglenoid tubercle (long head)

Upper posterior humerus (lateral head)

Lower posterior part of humerus, inferomedial to radial groove (medial head)

57
Q

What is the distal attachment of the triceps brachii?

A

Posterior upper surface of olecranon process.

58
Q

What are the actions of the triceps brachii?

A

Extends elbow

Stabilizes shoulder

59
Q

What innervates the triceps brachii?

A

Radial nerve

60
Q

What is the blood supply of the triceps brachii?

A

Deep brachial artery

61
Q

What is the proximal attachment of brachialis?

A

Anterior lower half of humerus

62
Q

What is the distal attachment of the brachialis?

A

Coronoid process and ulnar tuberosity

63
Q

What innervates the brachialis?

A

Musculocutaneous nerve and radial nerve

64
Q

What is the blood supply of the brachialis?

A

Muscular branch of brachial artery

Radial recurrent artery

65
Q

What are the actions of the brachialis?

A

Flexes elbow

66
Q

What is the proximal attachment of the deltoid?

A

Lateral 1/3 of clavicle

Acromion

Scapular spine

67
Q

What is the distal attachment of the deltoid?

A

Deltoid tuberosity (humerus)

68
Q

What are the actions of the deltoid?

A

Flexes, extends, medially rotates, laterally rotates, and abducts

69
Q

What innervates the deltoid?

A

Axillary nerve

70
Q

What is the blood supply of the deltoid?

A

Deltoid branch of the thoracoacromial artery

71
Q

What is the proximal attachment of the coracobrachialis?

A

Coracoid process

72
Q

What is the distal attachment of the coracobrachialis?

A

Middle 3rd of the medial surface of the humerus

73
Q

What are the actions of the coracobrachialis?

A

Assists in flexion and adduction of humerus

74
Q

What innervates the coracobrachialis?

A

Musculocutaneous nerve

75
Q

What is the blood supply of the coracobrachialis?

A

Muscular branch of the brachial artery

76
Q

What is the proximal attachment of the supraspinatus?

A

Supraspinous fossa

77
Q

What is the distal attachment of the supraspinatus?

A

Superior facet of the greater tubercle

78
Q

What are the actions of the supraspinatus?

A

Assists deltoid in adbuction of humerus

Stabilizes shoulder joint

79
Q

What is the innervation of the supraspinatus?

A

Suprascapular nerve

80
Q

What is the blood supply for the supraspinatus?

A

Suprascapular artery

81
Q

Proximal attachment of infraspinatus?

A

Infrospinous fossa

82
Q

What is the distal attachment of infraspinatus?

A

Middle facet of greater tubercle

83
Q

What innervates the infraspinatus?

A

Suprascapular nerve

84
Q

What is the action of the infraspinatus?

A

Laterally rotates humerus

Stabilizes head of humerus

85
Q

What is the blood supply to infraspinatus?

A

Suprascapular artery

86
Q

What is the proximal attachment of subscapularis?

A

Subscapular fossa

87
Q

What is the distal attachment of the subscapularis?

A

Lesser tubercle

88
Q

What are the actions of the subscapularis?

A

Medially rotates and adducts humerus

Stabilizes head of humerus

89
Q

What is the innervation of the subscapularis?

A

Upper and lower subscapular nerves

90
Q

What is the blood supply to the subscapularis?

A

Suprascapular artery

91
Q

What is the proximal attachment of the anconeus?

A

Posterior lateral epicondyle of humerus

92
Q

What is the distal attachment of the anconeus?

A

Lateral olecranon and superior, posterior ulna

93
Q

What innervates the anconeus?

A

Radial nerve

94
Q

What are the actions of the anconeus?

A

Abducts ulna during pronation

Assists in flexion

(J) Muscles (4 decks)

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