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Human Anatomy Exam III > Scapular & Pectoral Regions > Flashcards

Scapular & Pectoral Regions Flashcards

1
Q

What are the two joints associated with the UL that are considered bony articulations (not muscle attachments)?

A

Sternoclavicular & acrmoioclavicular

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2
Q

What are the two components that comprise the coracoclavicular ligament?

A

Trapezoid (more lateral) and coroid (more medial) ligaments

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3
Q

What are the rotator cuff muscles?

A

SITS = supraspinatus, infraspinatus, teres minor, subscapularis

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4
Q

Deltoid origin

A

Lateral clavicle, acromion, and spine of scapula

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5
Q

Deltoid insertion

A

Deltoid tuberosity of humerus

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6
Q

Deltoid action

A

Abducts humerus (primary function), flexes, extends, and rotates humerus (secondary function)

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7
Q

Deltoid supply

A

Axillary n & posterior circumflex humeral vessels (located in quadrangular space)

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8
Q

Teres Major origin

A

Inferior angle of scapula

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9
Q

Teres Major insertion

A

Crest of lesser tubercle of humerus

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10
Q

Teres Major action

A

Medially rotates & extends humerus

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11
Q

Teres Major supply

A

Lower (inferior) sub scapular n & subscapular vessels

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12
Q

Supraspinatus origin

A

Supraspinous fossa

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13
Q

Supraspinatus insertion

A

Greater tubercle of humerus

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14
Q

Supraspinatus action

A

Initial 15 degrees of humerus abduction (then deltoid takes over)

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15
Q

Supraspinatus supply

A

Suprascapular n & vessels & dorsal scapular vessels

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16
Q

Infraspinatus origin

A

Infraspinous fossa

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17
Q

Infraspinatus insertion

A

Greater tubercle of humerus

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18
Q

Infraspinatus action

A

Laterally rotates humerus

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19
Q

Infraspinatus supply

A

Suprascapular n & vessels & subscapular vessels

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20
Q

Teres Minor origin

A

Lateral border of scapula

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21
Q

Teres Minor insertion

A

Greater tubercle of humerus

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22
Q

Teres Minor action

A

Lateral rotation of humerus

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23
Q

Teres Minor supply

A

Axillary n & suprascapular & subscapular vessels

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24
Q

Subscapularis origin

A

Subscapular fossa

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25
Q

Subscapularis insertion

A

Lesser tubercle of humerus (more medially located than greater tubercle)

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26
Q

Subscapularis action & supply

A

Medial rotation of humerus

Upper & lower subscapular nn and subscapular vessels

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27
Q

What are the boundaries of the quadrangular space?

A

Superior: Teres Minor
Inferior: Teres Major
Medial: Long head of Triceps Brachii
Lateral: Surgical neck of humerus

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28
Q

What is contained within the quadrangular space?

A

Axillary n & posterior circumflex humeral vessels

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29
Q

What are the boundaries of the triangular space?

A

Superior: Teres Minor
Inferior: Teres Major
Lateral: Long head of Triceps Brachii

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30
Q

What is contained within the triangular space?

A

Circumflex scapular vessels

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31
Q

What are the boundaries of the triangular interval?

A

Superior: Teres Major
Medial: Long head of Triceps Brachii
Lateral: Lateral head of Triceps Brachii

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32
Q

What is contained within the triangular interval?

A

Radial n & Deep Brachial a

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33
Q

What makes up the suprascapular nerve?

A

Ventral rami of C5-C6

34
Q

Where does the suprascapular artery come from?

A

Thyrocervical trunk

35
Q

What ligament is associated with the suprascapular n & a? Which goes over/under?

A

The nerve runs under superior transverse scapular ligament through the suprascapular notch, while the artery runs over the ligament above the notch

36
Q

Suprascapular n & a action

A

Both pass through spinoglenoid notch to infraspinatus fossa & supply supraspinatus & infraspinatus mm

37
Q

What makes up the dorsal scapular nerve?

A

Ventral rams of C5

38
Q

Where does dorsal scapular artery come from?

A

Subclavian a or deep transverse cervical artery

39
Q

Dorsal scapular n & a action

A

Both run parallel to vertebral border of scapula & supply levator scapulae & rhomboid mm

40
Q

CN XI runs with which artery?

A

Transverse cervical artery

41
Q

Where does transverse cervical artery come from?

A

Thyrocervical trunk

42
Q

CN XI & transverse cervical a action

A

Both supply Trapezius m

43
Q

Where do the upper and lower subscapular nerves come from?

A

Posterior cord of brachial plexus; ventral rami of C5-C6

44
Q

Where does subscapular artery come from?

A

Third part of axillary artery

45
Q

What are the two branches of the subscapular artery?

A

Thoracodorsal artery & circumflex scapular artery

46
Q

Upper & lower subscapular nn & a action

A

All supply subscapularis m

47
Q

What other muscle do lower subscapular n and subscapular a also supply?

A

Teres Major m

48
Q

Collateral circulation of the scapular region is performed by which arteries?

A

Thyrocervical trunk & subscapular a

49
Q

Ligating anywhere distal to what artery inhibits blood flow to UL?

A

Subscapular a

50
Q

What two heads is Pectoralis Major divided into?

A

Clavicular and sternocostal heads

51
Q

What fascia is Pectoralis Minor enveloped in?

A

Clavipectoral fascia

52
Q

Pectoralis Major origin

A

Clavicle, sternum, and ribs 2-6

53
Q

Pectoralis Major insertion

A

Crest of greater tubercle of humerus

54
Q

Pectoralis Major action

A

Adducts & medially rotates humerus

55
Q

Pectoralis Major supply

A

Medial & lateral pectoral nn & thoracoacromial vessels

56
Q

Pectoralis Minor origin

A

Ribs 3-5

57
Q

Pectoralis Minor insertion

A

Coracoid process of scapula

58
Q

Pectoralis Minor action

A

Protracts scapula

59
Q

Pectoralis Minor supply

A

Medial pectoral n & thoracoacromial vessels

60
Q

What arteries supply the pectoral region?

A

Lateral & internal thoracic (mammary) arteries, thoracoacromial artery

61
Q

Lateral thoracic artery is a branch of which artery?

A

Second part of axillary artery

62
Q

Lateral thoracic artery runs with which nerve?

A

Long thoracic nerve

63
Q

What does lateral thoracic artery supply?

A

Lateral thorax, lateral pec region, and lateral breast

64
Q

Internal thoracic artery is a branch of what artery?

A

Subclavian a (inside thorax)

65
Q

What is the pathway of internal thoracic artery?

A

Descends across intercostal spaces lateral to sternum

66
Q

What does internal thoracic artery supply?

A

Anterior thorax, medial pectoral region, and medial breast

67
Q

Thoracoacromial artery is a branch of which artery?

A

Second part of axillary artery

68
Q

What are the four branches of thoracoacromial artery?

A

Pectoral, clavicular, acromial, deltoid

69
Q

What kind of innervation is supplied by cutaneous nerves?

A

General sensory

70
Q

Where do cutaneous nerves originate?

A

T1-T6

71
Q

What are the branches off the cutaneous nerves?

A

Lateral & anterior cutaneous branches of intercostal nerves

72
Q

Where does the medial pectoral nerve originate?

A

Medial cord of brachial plexus

73
Q

From where is the medial pectoral nerve derived?

A

Ventral rami C8-T1

74
Q

What muscle does medial pectoral nerve pierce?

A

Pectoralis minor m to enter Pectoralis major m

75
Q

What muscles does medial pectoral nerve supply?

A

Pectoralis minor & part of Pectoralis major

76
Q

Where does lateral pectoral nerve originate?

A

Lateral cord of brachial plexus

77
Q

From where is lateral pectoral nerve derived?

A

Ventral rami C5-C7

78
Q

What does lateral pectoral nerve supply?

A

Remainder of Pectoralis major muscle

79
Q

From where is long thoracic nerve derived?

A

Ventral rami C5-C7

80
Q

What muscle does long thoracic nerve supply?

A

Serratus anterior m superficially

81
Q

Damage to long thoracic nerve (common during mastectomy) results in what?

A

“Winged scapula” = lose the close adherence of scapula to posterior wall

Human Anatomy Exam III (5 decks)

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