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SHB > Shoulder, Breast, and Pectoral Region > Flashcards

Shoulder, Breast, and Pectoral Region Flashcards

1
Q

Pectoral Fascia

A

Covers the pectoralis major

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2
Q

Axillary fascia

A

Continuation of pectoral fascia laterally

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3
Q

Clavipectoral fascia

A

Deep to pectoralis major; encloses subclavius and pectoralis minor

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4
Q

Pectoralis major

A

Large, fan shaped muscle covering most of the anterior thoracic wall

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5
Q

Origin of Pectoralis major

A

Sternal half of clavicle, sternum to 7th rib, cartilages of true ribs, aponeurosis of external oblique muscle

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6
Q

Insertion of Pectoralis major

A

Lateral lip of intertubercular sulcus of humerus

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7
Q

Action of Pectoralis major

A

Flexes and adducts arm, rotates arm medially

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8
Q

Innervation of Pectoralis major

A

Medial and lateral pectoral nerves

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9
Q

Supply of Pectoralis major

A

Pectoral branch of thoraco‐acromial artery, perforating branches of internal thoracic artery

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10
Q

Origin of Pectoralis minor

A

Outer surface of upper margin of ribs 3–5

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11
Q

Insertion of Pectoralis minor

A

Coracoid process of scapula

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12
Q

Action of Pectoralis minor

A

Lowers lateral angle of scapula and protracts scapula

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13
Q

Innervation of Pectoralis minor

A

Medial pectoral nerve

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14
Q

Supply of Pectoralis minor

A

Pectoral branch of thoraco‐acromial and intercostal lateral thoracic arteries

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15
Q

Origin of Deltoid

A

Lateral third of anterior clavicle, lateral acromion, inferior edge of spine of scapula

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16
Q

Insertion of Deltoid

A

Deltoid tuberosity of humerus

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17
Q

Action of Deltoid

A

Rotates arm, abducts humerus from 15 to 90 degrees

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18
Q

Innervation of Deltoid

A

Axillary nerve

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19
Q

Supply of Deltoid

A

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

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20
Q

Rotator Cuff Muscles

A 
S i t S
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
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21
Q

Origin of the Supraspinatus

A

Supraspinous fossa of scapula and deep fascia

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22
Q

Insertion of the Supraspinatus

A

Greater tubercle of the humerus

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23
Q

Action of the Supraspinatus

A

Initiates abduction of the arm with the first 15 degrees

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24
Q

Innervation of the Supraspinatus

A

Suprascapular nerve

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25
Q

Supply of the Supraspinatus

A

Suprascapular artery

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26
Q

Origin of the Infraspinatus

A

Infraspinous fossa of scapula and deep fascia

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27
Q

Insertion of the Infraspinatus

A

Greater tubercle of the humerus

28
Q

Action of the Infraspinatus

A

Lateral rotation of arm (with teres minor)

29
Q

Supply of the Infraspinatus

A

Suprascapular artery

30
Q

Innervation of the Infraspinatus

A

Suprascapular nerve

31
Q

Origin of Teres major

A

Posterior surface of inferior angle of scapula

32
Q

Insertion of Teres major

A

Medial lip of intertubercular sulcus of humerus

33
Q

Action of Teres major

A

Adducts and medially rotates arm

34
Q

Innervation of Teres major

A

Lower subscapular nerve

35
Q

Supply of Teres major

A

Circumflex scapular artery

36
Q

Origin of Subscapularis

A

Subscapular fossa

37
Q

Insertion of Subscapularis

A

Lesser tubercle of humerus

38
Q

Action of Subscapularis

A

Medially rotates arm at shoulder and adducts it, helps hold humeral head in glenoid cavity

39
Q

Innervation of Subscapularis

A

Upper and lower subscapular nerves

40
Q

Supply of Subscapularis

A

Subscapular artery, lateral thoracic artery

41
Q

Origin of Teres minor

A

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

42
Q

Insertion of Teres minor

A

Inferior facet of greater tubercle of humerus

43
Q

Action of Teres minor

A

Laterally rotates arm

44
Q

Innervation of Teres minor

A

Axillary nerve

45
Q

Supply of Teres minor

A

Circumflex scapular artery

46
Q

Subclavian artery branches

A

VITamin C and sometimes D

47
Q

Axillary artery branches

A

Screw The Lawyer, Save A Patient

48
Q

First part of the axillary artery

A

Medial to the pectoralis minor; Superior thoracic artery

49
Q

Second part of the axillary artery

A

Under the pectoralis minor; Thoracoacromial trunk and Lateral thoracic arteries

50
Q

Third part of the axillary artery

A

Lateral to the pectoralis minor; Subscapular, Anterior and Posterior circumflex humeral arteries

51
Q

The dorsal scapular nerve innervates…

A

The levator scapulae and the rhomboid major and minor

52
Q

The suprascapular nerve innervates…

A

The supraspinatus and the infraspinatus muscle

53
Q

The long thoracic nerve innervates…

A

The serratus anterior

54
Q

The axillary nerve innervates…

A

The deltoid and the teres minor

55
Q

The upper subscapular nerve innervates…

A

The subscapularis

56
Q

The lower subscapular nerve innervates…

A

The subscapularis and the teres major

57
Q

The thoracodorsal nerve innervates…

A

The latissimus dorsi

58
Q

The medial pectoral nerve innervates…

A

The pectoralis major and the pectoralis minor

59
Q

The lateral pectoral nerve innervates…

A

The pectoralis major

60
Q

The breast extends…

A

Vertically, from the 2nd to the 6th rib

61
Q

The breast contains…

A

1 lactiferous duct per lobe and 15-20 tubuloalveolar glands (with each forming a lobe)

62
Q

Suspensory ligaments (of Cooper)

A

Attach the lobes to the skin and divide the glandular tissue into lobes

63
Q

Arterial supply to the breast

A

Internal thoracic artery (internal mammary, subclavian), the pectoral branch of thoracoacromial trunk (axillary) and the lateral thoracic artery (axillary)

64
Q

Lymphatics of the breast

A

Many nodes drain the breast, but the majority of the nodes drain towards the axilla. Remember CLASP (central, lateral, apical, subscapular, and pectoral nodes)

65
Q

Where does the highest frequency of breast cancer occur?

A

In the superior lateral quadrant of the breast, which drains to the axillary nodes.

SHB (11 decks)

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