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Gross anatomy > Pectoral region and axilla > Flashcards

Pectoral region and axilla Flashcards

1
Q

PECTORALIS MAJOR MUSCLE medial

A

medial half of the clavicle, 2-6 costal cartilages, anterior layer of the rectus sheath

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2
Q

PECTORALIS MAJOR MUSCLE lateral

A

crest of the greater tubercle of the humerus

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3
Q

PECTORALIS MAJOR MUSCLE function

A

flexes, adducts, and medially rotates the humerus

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4
Q

PECTORALIS MAJOR MUSCLE innervation

A

medial and lateral pectoral nerves (C5-T1)

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5
Q

PECTORALIS MAJOR MUSCLE vascularization

A

pectoral branch of the thoraco-acromial artery

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6
Q

two heads of the PECTORALIS MAJOR MUSCLE

A

clavicular head and sternocostal head (the two heads meet at the sternoclavicular joint)

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7
Q

DELTOPECTORAL TRIANGLE borders

A

superior border of the clavicular head of the pectoralis major muscle and the inferior border of the deltoid muscle near the clavicle

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8
Q

DELTOPECTORAL TRIANGLE narrows to form the

A

deltopectoral groove

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9
Q

what is deep to the CLAVICULAR HEAD

A

lateral pectoral nerve and the pectoral branch of the thoracoacromial artery

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10
Q

deep to the PECTORALIS MAJOR MUSCLE

A

clavipectoral fascia, pectoralis minor muscle, and subclavius muscle

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11
Q

PECTORALIS MINOR MUSCLE inferior

A

ribs 3-5 near their costal cartilages

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12
Q

PECTORALIS MINOR MUSCLE superior

A

coracoid process of the scapula

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13
Q

PECTORALIS MINOR MUSCLE function

A

draws the glenoid cavity of the scapula anteriorly and inferiorly

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14
Q

PECTORALIS MINOR MUSCLE innervation

A

medial and lateral pectoral nerve (C8, T1)

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15
Q

PECTORALIS MINOR MUSCLE vascularization

A

pectoral branch of the thoracoacromial artery

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16
Q

SUBCLAVIUS MUSCLE location

A

inferior to the clavicle; attached to the clavicle and the first rib

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17
Q

SUBCLAVIUS MUSCLE function

A

depresses the clavicle

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18
Q

SUBCLAVIUS vascularization

A

clavicular branch of the thoracoacromial artery

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19
Q

SUBCLAVIUS innervation

A

nerve to the subclavius

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20
Q

branches of the thoracoacromial artery

A

pectoral branch (largest), deltoid branch, acromial branch, clavicular branch

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21
Q

SERRATUS ANTERIOR MUSCLE anterior

A

ribs 1-9

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22
Q

SERRATUS ANTERIOR MUSCLE posterior

A

anterior surface of the scapula along the entire length of its medial border

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23
Q

SERRATUS ANTERIOR MUSCLE function

A

protracts the scapula and rotates the scapula (when the arm is abducted above the horizontal plane)

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24
Q

SERRATUS ANTERIOR MUSCLE vascularization

A

?

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25
Q

SERRATUS ANTERIOR MUSCLE innervation

A

long thoracic nerve (C5-C7)

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26
Q

AXILLA region function

A

region of passage for vessels and nerves that course from the root of the neck into the upper limb

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27
Q

AXILLA region components

A

axillary sheath, brachial plexus, axillary vessels and their branches, lymph nodes and lymphatic vessels, portions of 3 muscles, and fat and connective tissue

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28
Q

apex of the axilla

A

bounded by the clavicle anteriorly, the superior border of the scapula posteriorly, and the first rib medially

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29
Q

base of the axilla

A

skin and fascia of the armpit

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30
Q

anterior wall of the axilla

A

pectoralis major muscle, pectoralis minor muscle, and clavipectoral fascia

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31
Q

posterior wall of the axilla

A

teres major and latissimus dorsi muscles and the subscapularis muscle that covers the anterior surface of the scapula

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32
Q

lateral wall of the axilla

A

intertubercular sulcus of the humerus

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33
Q

AXILLARY ARTERY location begins

A

begins at the lateral border of the first rib where it is the continuation of the subclavian artery; (axillary artery is surrounded by the brachial plexus)

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34
Q

AXILLARY ARTERY location ends

A

ends at the inferior border of the teres major muscle where its name changes to brachial artery

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35
Q

first part of the AXILLARY ARTERY

A

extends from the lateral border of the first rib to the medial border of the pectoralis minor muscle

36
Q

second part of the AXILLARY ARTERY

A

lies posterior to the pectoralis minor muscle

37
Q

third part of the AXILLARY ARTERY

A

extends from the lateral border of the pectoralis minor muscle to the inferior border of the teres major muscle

38
Q

Branch of the first part of the axillary artery

A

superior thoracic artery

39
Q

SUPERIOR THORACIC ARTERY function

A

supplies blood to the first and second intercostal spaces

40
Q

Branches of the second part of the axillary artery

A

thoracoacromial artery and lateral thoracic artery

41
Q

SUPERIOR THORACIC ARTERY location

A

arises near the apex of the axilla

42
Q

LATERAL THORACIC ARTERY location

A

arises at the lateral border of the pectoralis minor muscle and descends along the lateral border of the pectoralis minor muscle

43
Q

LATERAL THORACIC ARTERY function

A

supplies the pectoral muscles, the serratus anterior muscle, the axillary lymph nodes, and the lateral thoracic wall

44
Q

branches of the third part of the axillary artery

A

subscapular artery, posterior circumflex humeral artery, and anterior circumflex humeral artery

45
Q

SUBSCAPULAR ARTERY divides into

A

(largest branch of the axillary artery); divides into the circumflex scapular artery and the thoracodorsal artery

46
Q

CIRCUMFLEX SCAPULAR ARTERY function

A

vascularization to muscles on the posterior surface of the scapula

47
Q

THORACODORSAL ARTERY function

A

supplies the latissimus dorsi

48
Q

ANTERIOR AND POSTERIOR CIRCUMFLEX HUMERAL ARTERIES function

A

supply the deltoid muscle; (posterior is larger)

49
Q

QUADRANGULAR SPACE contains

A

axillary nerve and the posterior circumflex humeral artery

50
Q

POSTERIOR CIRCUMFLEX HUMERAL ARTERY location

A

posterior to the surgical neck of the humerus

51
Q

ANTERIOR CIRCUMFLEX HUMERAL ARTERY location

A

anterior surface of the humerus at the surgical neck

52
Q

SUBSCAPULARIS MUSCLE medial

A

subscapular fossa of the scapula

53
Q

SUBSCAPULARIS MUSCLE lateral

A

lesser tubercle of the humerus

54
Q

DORSAL SCAPULAR NERVE origin

A

C5

55
Q

DORSAL SCAPULAR innervation

A

both rhomboids

56
Q

AXILLARY NERVE origin

A

C5, C6

57
Q

AXILLARY NERVE innervation

A

teres minor and deltoid

58
Q

RHOMBOID chief action

A

retraction of the scapula

59
Q

TERES MINOR chief action

A

external rotation of arm

60
Q

DELTOID chief action

A

abduction of arm

61
Q

LATERAL PECTORAL NERVE origin

A

C5-C7

62
Q

LATERAL PECTORAL NERVE innervation

A

upper pectoralis major

63
Q

UPPER PECTORALIS MAJOR muscle chief action

A

adduction-flexion of arm

64
Q

MEDIAL PECTORAL NERVE origin

A

C8, T1

65
Q

MEDIAL PECTORAL NERVE major muscle

A

lower pectoralis major and pectoralis minor

66
Q

LOWER PECTORALIS MAJOR muscle chief action

A

adduction-extension of arm

67
Q

PECTORALIS MINOR MUSCLE chief action

A

depression of shoulder

68
Q

THORACODORSAL NERVE origin

A

C6-C8

69
Q

THORACODORSAL NERVE innervation

A

latissimus dorsi

70
Q

LATISSIMUS DORSI chief action

A

extension-adduction of arm

71
Q

MUSCOLOCUTANEOUS NERVE origin

A

C5-C7

72
Q

MUSCOLOCUTANEOUS NERVE innervation

A

biceps brachii, coracobrachialis, brachialis

73
Q

BICEPS BRACHII chief action

A

flexination-supination of forearm

74
Q

CORACOBRACHIALIS chief action

A

adduction-flexion of arm

75
Q

BRACHIALIS chief action

A

flexion of forearm

76
Q

RADIAL NERVE origin

A

C5-C8

77
Q

RADIAL NERVE innervation

A

triceps and anconeus

78
Q

TRICEPS chief action

A

extension of forearm

79
Q

ANCONEUS chief function

A

extension of forearm

80
Q

MEDIAN NERVE origin

A

C5-T1

81
Q

MEDIAN NERVE innervation

A

abductor pollicis brevis, opponens pollicis, lumbricals I and II

82
Q

ABDUCTOR POLLICIS BREVIS chief action

A

abduction of thumb

83
Q

OPPONENS POLLICIS chief action

A

opposition of thumb

84
Q

LUMBRICALS I and II chief action

A

don’t need to know now

85
Q

ULNAR NERVE origin

A

C8, T1

86
Q

ULNAR NERVE innervation

A

adductor pollicis, abductor digiti minimi, lumbricals III and IV, and interossei

87
Q

ULNAR NERVE innervation of major muscles are primarily

A

related to the hand

Gross anatomy (6 decks)

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