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MSK Final > Scap, Delt, Pec, and Axilla > Flashcards

Scap, Delt, Pec, and Axilla Flashcards

1
Q

What is the Triangle of Auscultation?

A

Under trap/deltoid (armpit area) where there is less tissue, so it is easier to hear breathing sounds

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2
Q

What are the components of the scapular anastomosis?

A

suprascapular artery, dorsal scapular artery, posterior intercostal arteries, circumflex scapular artery, and thoracodorsal artery

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3
Q

What are the four rotator cuff muscles?

A

SITS: Subscapularis, Infraspinatus, Teres minor, and Supraspinatus

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4
Q

What provides the shoulder joint support by holding the humeral head in the glenoid cavity?

A

The rotator cuff muscles/tendons

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5
Q

What is the most commonly injured rotator cuff tendon?

A

Supraspinatus tendon

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6
Q

What ligament holds the long tendon of biceps brachii in the intertubercular groove?

A

Transverse ligament

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7
Q

What vessels/structures transmit through Quadrangular Space?

A

the axillary nerve and the posterior circumflex humeral artery

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8
Q

What is found within the Triangular Space?

A

Circumflex scapular artery

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9
Q

What is found within the Triangular Interval?

A

The deep brachial artery and radial nerve

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10
Q

What innervates the breast?

A

The anterior and lateral branches of the 4th-6th intercostal nerves–and sometimes the supraclavicular nerve branches

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11
Q

What attaches the dermis of the breast to the overlying skin?

A

Suspensory ligaments (also called Cooper’s Ligaments)

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12
Q

What are the primary blood supplies to the breast?

A

Lateral thoracic artery (originates from the axillary artery) and the Internal thoracic artery (originates from the subclavian artery)

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13
Q

Where does 75% of the lymph from the breast drain?

A

Into axillary lymph nodes (pectoral, central, and apical)

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14
Q

The superficial fascia of the pectoral region contains what vessels/structures and unusual body feature?

A

It contains supraclavicular nerves, and the anterior and lateral branches of intercostal nerves

It also contains/gives rise to the platysma muscle

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15
Q

The pectoralis minor is a landmark that splits what artery and into how many/what portions?

A

It splits the axillary artery into 3 portions (Part 1 is proximal/medial to P minor, Part 2 is at/behind P. minor, and Part 3 is distal/lateral to P minor)

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16
Q

What are the primary venous return vessles in the arm?

A

Deep brachial veins and superficial veins (Basilic v. – turns into axillary and cephalic v. – drains into axillary)

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17
Q

The part 1 (proximal/medial to P minor) branch of the axillary artery includes what vessel(s)?

A

superior thoracic artery

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18
Q

The part 2 (at/behind P minor) branch of the axillary artery includes what vessel(s)?

A

thoracoacromial trunk –> pectoral, deltoid, acromial (clavicular) branches

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19
Q

The part 3 (distal/lateral to P minor) branch of the axillary artery includes what vessel(s)?

A

The subscapular artery (gives rise to circumflex scapular artery and thoracodorsal artery)

The anterior and posterior circumflex humeral arteries

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20
Q

The Clavipectoral fascia becomes what structure and is pierced by what vessels?

A

The suspensory ligament of the axilla

Cephalic vein, thoracoacromial artery, and lateral pectoral nerves

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21
Q

Proximal attachment of Deltoid

A

Lateral 1/3 of clavicle, acromion, and spine of scapula

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22
Q

Distal attachment of Deltoid

A

Deltoid tuberosity of humerus

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23
Q

Actions of Deltoid

A

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

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24
Q

Blood supply of Deltoid

A

Deltoid branch of thoracoacromial arterial trunk

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25
Q

Innervation of Deltoid

A

Axillary nerve (C5, C6)

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26
Q

Proximal attachment of Teres major

A

Posterior surface of inferior angle of scapula

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27
Q

Distal attachment of Teres major

A

Medial lip of intertubercular (bicipital) groove of humerus

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28
Q

Actions of Teres major

A

Adducts and medially rotates humerus

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29
Q

Blood supply of Teres major

A

Circumflex scapular artery

30
Q

Innervation of Teres major

A

Lower subscapular nerve (C5, C6)

31
Q

Proximal attachment of Serratus anterior

A

External surfaces of lateral parts of ribs 1-9

32
Q

Distal attachment of Serratus anterior

A

Anterior surface of medial border of scapula

33
Q

Actions of Serratus anterior

A

Protracts scapula and holds it against thoracic wall; rotates scapula

34
Q

Blood supply of Serratus anterior

A

Lateral thoracic artery

35
Q

Innervation of Serratus anterior

A

Long thoracic nerve (C5, C6, C7)

36
Q

Proximal attachment of Supraspinatus

A

Supraspinous fossa of scapula

37
Q

Distal attachment of Supraspinatus

A

Superior facet of greater tubercle of humerus

38
Q

Actions of Supraspinatus

A

Works with deltoid in abduction of humerus; acts with other rotator cuff muscles in stabilizing shoulder joint

39
Q

Blood supply of Supraspinatus

A

Suprascapular artery

40
Q

Innervation of Supraspinatus

A

Suprascapular nerve (C4, C5, C6)

41
Q

Proximal attachment of Subscapularis

A

Subscapular fossa (anterior surface of scapula)

42
Q

Distal attachment of Subscapularis

A

Lesser tubercle of humerus

43
Q

Actions of Subscapularis

A

Medially rotates and adducts humerus; helps hold humeral head in place

44
Q

Blood supply of Subscapularis

A

Subscapular artery

45
Q

Innervation of Subscapularis

A

Upper and lower subscapular nerves (C5, C6, C7)

46
Q

Proximal attachment of Infraspinatus

A

Infraspinous fossa of scapula

47
Q

Distal attachment of Infraspinatus

A

Middle facet of greater tubercle of humerus

48
Q

Actions of Infraspinatus

A

Laterally rotates humerus; helps hold humeral head in place

49
Q

Blood supply of Infraspinatus

A

Suprascapular artery

50
Q

Innervation of Infraspinatus

A

Suprascapular nerve (C5, C6)

51
Q

Proximal attachment of Teres minor

A

Middle part of lateral border of scapula

52
Q

Distal attachment of Teres minor

A

Inferior facet of greater tubercle of humerus

53
Q

Actions of Teres minor

A

Laterally rotates humerus; helps hold humeral head in place

54
Q

Blood supply of Teres minor

A

Circumflex scapular artery

55
Q

Innervation of Teres minor

A

Axillary nerve (C5, C6)

56
Q

Proximal attachment of Pectoralis major

A

Clavicular and sternocostal attachments: anterior surface of medial 1/2 clavicle, anterior surface of sternum and superior 6 costal cartilages

57
Q

Distal attachment of Pectoralis major

A

Lateral lip of intertubercular sulcus (bicipital groove)

58
Q

Actions of Pectoralis major

A

Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly (via clavicle); clavicular portion flexes humerus; sternal portion can extend humerus in flexed position

59
Q

Blood supply of Pectoralis major

A

Pectoral branches of thoracoacromial trunk

60
Q

Innervation of Pectoralis major

A

Lateral and medial pectoral nerves (C5, C6 clavicular portion; C7, C8, T1 sternocostal portion)

61
Q

Proximal attachment of Pectoralis minor

A

3rd-5th ribs, near costal cartilages

62
Q

Distal attachment of Pectoralis minor

A

Coracoid process of scapula

63
Q

Actions of Pectoralis minor

A

Stabilizes scapula by pulling it anteriorly and inferiorly against posterior thoracic wall

64
Q

Blood supply of Pectoralis minor

A

Pectoral branches of thoracoacromial trunk

65
Q

Innervation of Pectoralis minor

A

Medial pectoral nerve (C8, T1), usually pierced by this nerve

66
Q

Proximal attachment of Subclavius

A

Junction of 1st rib and its costal cartilage

67
Q

Distal attachment of Subclavius

A

Inferior surface of middle 1/3 clavicle

68
Q

Actions of Subclavius

A

Anchors and depresses clavicle

69
Q

Blood supply of Subclavius

A

Clavicular branches of thoracoacromial arterial trunk

70
Q

Innervation of Subclavius

A

Nerve to subclavius (C5, C6)

MSK Final (7 decks)

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