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OS 203 > OS 203 2 Shoulder and Arm - Sheet1 > Flashcards

OS 203 2 Shoulder and Arm - Sheet1 Flashcards

1
Q

5 joints of pectoral girdle

A

vertebrocostal, costosternal, sternoclavicular, acromioclavicular, glenohumeral

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2
Q

2 articulations of pectoral girdle

A

subacromial, scapulothoracic

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3
Q

least movement among the joints of the girdle

A

vertebrocostal, costosternal, sternoclavicular, acromioclavicular, glenohumeral

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4
Q

sternoclavicular - mobility

A

greeeat

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5
Q

costosternal - mobility

A

little

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6
Q

what is the glenoid labrum

A

cartilage surrounding the rim of the glenoid fossa

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7
Q

glenoid labrum deepens the fossa by _ and increases depth by _

A

deepens by 2.5 mm, increases depth by 100%

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8
Q

reduces glenoid depth by 50%

A

anterior labral detachment

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9
Q

which among the anterior (superior, middle, inferior) ligaments is the strongest

A

middle

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10
Q

which among the anterior (superior, middle, inferior) ligaments is the weakest

A

inferior

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11
Q

rotator cuff synergism

A

supraspinatus-teres minor; subscapularis-antagonist-infraspinatus

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12
Q

supraspinatus vector

A

up

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13
Q

infraspinatus vector

A

down

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14
Q

subscapularis

A

down

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15
Q

glenohumeral abduction:scapulothoracic articulation

A

2 is to 1 (for every 2 deg glenohumeral abduction, 1 deg scapulothoracic articulation)

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16
Q

components of the intricate collateral system

A

circumflex scapular artery, circumflex humeral artery

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17
Q

supplies blood to the dorsum of scapula

A

circumflex scapular artery (also anastomoses around scapula)

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18
Q

encircles surgical neck of humerus, anastomosing w each other

A

circumflex humeral artery

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19
Q

anterior & posterior circumflex humeral artery: size, supplies blood to where

A

anterior - smaller; supplies to the shoulder… posterior - larger, glenohumeral jt and surrounding muscles

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20
Q

quadrangular space artery and innervation

A

posterior circumflex artery, axillary nerve

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21
Q

triangular interval - artery and innervation

A

profunda brachii, radial nerve

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22
Q

triangular space - artery and nerve

A

circumflex scapular artery (no nerve)

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23
Q

xray: humerus superimposed with glenoid fossa (4)

A

anterior labrum detachment, torn capsule, long head of biceps attenuated, subscapularis muscles destroyed

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24
Q

what happens when dislocation occurs

A

muscles will contract (sudden pain), 6-8 wks before healing

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25
Q

longest bone in the body (and 2nd longest)

A

femur, humerus

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26
Q

head articulates w

A

glenoid fossa

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27
Q

anatomical neck, what’s attached?

A

glenohumeral joint capsule

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28
Q

attachment of deltoid

A

deltoid tuberosity (lateral)

29
Q

radial groove what passes here

A

radial nerve and deep artery

30
Q

capitulum articulates with

A

head of radius

31
Q

trochlea articulates with

A

head of ulna

32
Q

humerus: fossae of anterior surface receives what? tapos sa posterior?

A

anterior: coronoid fossa (ulna coronoid process), radial fossa (radial head); posterior: olecranon fossa (olecranon process of ulna during extension)

33
Q

joints of the elbow (3) what kind?

A

humeroulnar (trochleoulnar) - ginglymus, proximal radioulnar - trochoid/pivot, humeroradial (capituloradial) - condyloid (shallow ball and socket)

34
Q

ligaments of the elbow (3)

A

medial/ulnar collateral ligament, lateral/radial collateral ligament, annular ligament

35
Q

holds the long head of the biceps in the groove

A

transverse humeral ligament

36
Q

main flexor of forearm

A

brachialis

37
Q

enables you to put down something slowly (extends slowly during extension)

A

brachialis

38
Q

resists downward dislocation of humeral head

A

coracobrachialis

39
Q

flexes shoulder

A

coracobrachialis

40
Q

main extensor of the triceps

A

medial

41
Q

least active in the triceps, stabilizes glenohumeral joint by resisting inferior displacement of humeral head

A

long head

42
Q

blood flow: heart –> ? –> a.a. –> ? –> r. sub? –> ? –> ? –> ?

A

heart -> aorta -> aortic arch -> brachiocephalic -> right subclavian -> axillary -> brachial -> radial/ulnar

43
Q

allow alternative route for blood flow in case of injury

A

circumflex arteries

44
Q

what can happen when the posterior circumflex artery and axillary nerve (located where?) are damaged?

A

located near the surgical nec; deterioration of deltoids when damaged!

45
Q

circumflex scapular artery arises from? circumflex humeral arteries arise from? supplies?

A

from subscapular artery; from axillary artery, supplies deltoid

46
Q

limb development happens in

A

weeks 5-8

47
Q

connects the shoulder to the axial skeleton

A

clavicle

48
Q

ligaments that stabilize the ligament (3)

A

interclavicular, sternoclavicular, costoclavicular

49
Q

does the clavicle have a medullary cavity?

A

nope, spongy bone itu

50
Q

1st bone to ossify

A

clavicle

51
Q

increase the resilience of the clavicle

A

S shape! (convex medial, concave lateral)

52
Q

joint that is last to ossify

A

sternoclavicular joint

53
Q

found at both joints of the clavicle

A

fibrocartilage disc

54
Q

what attaches to conoid tubercle of the clavicle

A

conoid and coracoclavicular ligaments

55
Q

what attaches to trapezoid line of the clavicle

A

trapezoid ligament

56
Q

attachment of subclavius muscle and costoclavicular ligament

A

subclavian groove of clavicle

57
Q

attachment of biceps brachii sa scapula

A

supra- & infraglenoid tubercle

58
Q

trapezius action(s)

A

descending - elevate scapula; middle - retract scapula; ascending - depress scapula

59
Q

levator & rhomboids vs serratus

A

the first 2 retracts the scapula and depresses the glenoid cavity; serratus anterior protracts the scapula (*punching) and elevates glenoid cavity so arms can be raised above the shoulder

60
Q

infraspinatus & teres minor vs subscapularis

A

subscapularis - medial rotator of arm

61
Q

ends of pec major

A

clavicular and sternal

62
Q

pec minor stabilizes the

A

scapula

63
Q

subclavius stabilizes the

A

clavicle

64
Q

absence of clavicle -> condition, defect

A

cleidocranial dysostosis / cleidocranial dysplasia, can touch shoulders together

65
Q

1 shoulder blade sits higher on the back than the other

A

sprengel’s deformity / congenital high scapula

66
Q

proximal fracture near surgical nerve injuries

A

axillary nerve & arteries -> deltoid deterioration (*eto yung circumflex na sabi kanina :|)

67
Q

medial fracture injury

A

radial nerve (at radial groove) -> inability to move wrists up and down

68
Q

distal fracture

A

brachial artery & median nerve -> impede wrist and phalangeal movement (and sensation)

OS 203 (7 decks)

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