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Gross Anatomy > Shoulder (Outline 14) > Flashcards

Shoulder (Outline 14) Flashcards

1
Q

Nerve Innervation to shoulder?

Blood supply?

A

brachial plexus (anterior rami of C5-T1)

branches of subcalvan and axiallries

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2
Q

Muscles of shoulder?

A

Direct to Humerus

Extrinsic

Intrinsic

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3
Q

Extrinsic muscle?

A

movement of shoulder girdle in relative to axial skeleton (attachment of shoulder girdle with vertebrae)

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4
Q

Intrinsic muscle

A

Movement free limbs relative to the shoulder girdle

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4
Q

What are the anterior extrinsic muscle?

A

subclavius

pec minor

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5
Q

What are the posterior extrinsic muscle?

A

levaetor scapula

trapezius

rhomboid major/minor

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6
Q

What part of muscle is the serratus anterior in?

A

extrinsic muscle of shoulder

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7
Q

What are the intrinsic muscles?

A

SITS ( supraspinatus, infaspinatus, teres minor, subscapularis)

teres major

deltoids

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8
Q

OIANB of supraspinatus?

A

Supraspinous fossae of scapula

top of greater tubercle of humerus

abduction of humerus/ stabilize head of humerus

suprascapular N

suprascapular A

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9
Q

OIANB of infraspinatus?

A

infraspinous fossa of scapula

middle facet of greater tubercle of humerus

lateral rotation/ extension of humerus

suprascapular N

suprascapular A

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10
Q

OIANB of teres minor

A

Upper 2/3 of dorsal surface of axillary border of scapula

lower facet of greater tubercle of humerus

lateral rotation

axiallary nerve

post humerus circumflex a

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11
Q

OIANB of subscapularis

A

lesser tubercle of humerus

internal rotation

Upper/Lower subscapular N
Circumflex Scapular A

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12
Q

OIANB of teres major

A

posterior surface of inferior border of scapula

medial lip of intertubercular groove of humerus

lateral rotation and extension of humerus

lower subscapular nerve

circumflex scapular artery

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13
Q

OIANB of deltoids

A
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14
Q

What are the muscles in common that attach to poster ior vertebral/medial border of scapula

A

levator scapula. rhomboid major/minor

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15
Q

What does deltoids and trapezius have in common?

lats & major in common?

deltoids & teres minor

Rhomboids & Levator Scapulae

A

origin and insertion

same actions

Axillary N and PHCA

Dorsal Scapular N + A

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16
Q

Name muscle in Pink/Green/Yellow

What do they have in common?

A

Levator Scapulae

Rhomboid Minor

Rhomboid Major

Dorsal Scapular A+N

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17
Q

What does subscapularis and teres major have in common?

A

Circumflex Scapular Artery

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18
Q

What muscles have lateral rotation of humerus?

A

teres minor

infraspinatus

teres major

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19
Q

What are the joints in shoulder

A

Sternoclavicular

Acromioclavicular

Glenohumeral

Scapulothoracic

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20
Q

What joint of shoulder is pseudo?

A

scapulathoracic

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21
Q

Motion of scapularthoracic joint

A

Elevation/Depression

Protraction/Retraction

Rotation

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22
Q

Muscles involved in Elevation of scapularthoracic joint

Muscles involved in Depression of scapularthoracic joint

A

Upper Trapezius/ Levator Scapulae

Lower Traps/ Pec Minor

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23
Q

Muscles involved in Protraction of scapularthoracic joint

Muscles involved in Retraction of scapularthoracic joint

A

Pec Minor/ Serratus Anterior

Rhomboids/Middle Trapezius

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24
Q

Scapulathoracic Joint

A

joint between scapula and thorax

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25
Q

Sternoclavicular Joint

A

Joint between sternum (clavicular notch of manubrium) and clavicle (proximal end of clavicle)

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26
Q

What connect between proximal end of clavicle and clavicular notch of manubrium

A

articular disk

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27
Q

What does fibrous capsule do in sternoclavicular joint?

A

surround the joint capsule and perimeter of articular disk

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28
Q

What are major ligaments in sternocalvicular joint?

A

anterior/posterior sternoclavicular lig

costoclavicular

interclavicular

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29
Q

Describe ant/post sternoclavicular lig

costoclavicular lig

interclavicular

A

between sternum and clavicular

between medial inferior border of clavicle and costal cartilage 1st ribs

between clavicles

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30
Q

Blood supply for sternoclavicular joint?

A

clavicular branch of thoracoacromial trunk

internal thoracic

inferior thyroid branch of thyrocervical trunk

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31
Q

Function of ant/post sternoclavicular lig

costoclavicular lig

interclavicular lig

A

blended in with joint capsule to reinforce the joint

prevent the clavicle pop up during depression/elevation

prevent the clavicle pop out during protraction

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32
Q

Nerve supply for sternoclavicular joint?

A

supraclavicular nerve branches

33
Q

What type of joint is sternoclavicular?

A

diathroses/plane joint (it has joint capsule - synovial joint)

34
Q

Acromioclavicular joint connects which structures?

A

Between the distal end of the clavicle and the acromion process of the scapla.

35
Q

Movements of acromicoclavicular joint are associates with what?

36
Q

Acromioclavicular joint Reinforced by two ligaments

A

acromio-clavicular lig

coracoclavicular lig

37
Q

Acromio-clavicular ligament

A

completely surround and reinforce joint capsule

38
Q

Coracoclavicular ligament? Property? Function?

A

connect coracoid process up to inferior side of distal end of clavicle

Strong ligament to resist lots of force

Keep the clavicle down and close to scapula

38
Q

scapular rotation will result in movement of what joint in shoulder?

A

acromioclavicular joint

39
Q

Acromioclavicular joint nerve supply

A

suprascapular, axillary, and petoral nerves

40
Q

Blood supply for acromioclavicular joint?

A

acromial rete

41
Q

what contribute ot the acromial rete?

A

thoracoacromio trunk (deltoid, acromion artery)

42
Q

Character of glenohumeral Joint

A

the glenoid fossa doesn’t match up with size and curvature of the head of the humerus

43
Q

Glenoid labrum

A

the fibrocartilage rim that on the glenoid fossa

44
Q

what is the characteristic of the joint capsule in glenohumeral joint?

A

its lose and doesn’t give stability as other

45
Q

Glenohumeral joint ligaments?

A

coracohumeral ligament

glenohumeral lig

transverse lig

46
Q

Coracohumeral ligament

A

connects coracoid process with the greater tubercle of humerus (reinforce superior joint capsule)

47
Q

Glenohumeral Lig

A

connect the rim of glenoid fossa to surgical neck of humerus (reinforce the anterior joint capsule)

48
Q

transverse ligament

Function?

A

doesn’t reinforce and connect the medial and lateral lip intertubercular groove of humerus

hold the tendon of long head bicep

49
Q

What other structures are crucial to stabilize and reinforce glenohumeral joint?

A

tendinous cuff

coracoacromial arch

50
Q

Tendinous cuff

A

Muscles that stabilize the glenohumeral joint

51
Q

Border of tendinous cuff (rotator cuff)

A

Anterior: subscapularis

Posterior - Superior: supraspintus

Post-Middle: Infraspinatus

Post-Inf: Teres minor

52
Q

Characteristics of muscle tendons?

A

dynamic stabilities because they can contract

53
Q

95% dislocation of glenohumeral joint is where?

A

anterior- inferior

54
Q

What does the coracoacromial arch prevent?

A

prevent humerus from moving superiorly

55
Q

Bursae involved in glenohumeral joint?

A

subacromial-subdeltoid

supscapularis

56
Q

subacromial-subdeltoid bursae

A

between supraspinatus tendon and acromial process (coracoacromial ligament)

between deltoid muscle and humerus

57
Q

subscapularis bursae

A

between the neck of glenoid fossa and subscapularis

57
Q

BS for glenohumeral joint

A

suprascapular & 2 circumflex humeral artery

58
Q

Nerve supply to glenohumeral joint?

A

axillary

suprascapular nerve

58
Q

What joint also move when glenohumeral joint move?

How is the ratio of these two joints in relation?

A

scapulothoracic joint

Glenohumeral joint:Scapulothoracic (2:1)

59
Q

What muscle is without can’t initiate the abduction of shoulder?

A

supraspinatus

60
Q

0-90 degree abduction/adduction

A

glenohumeral joint mostly

60
Q

What part of deltoid that responsible for abduction?

A

middle deltoid

61
Q

At 120 abduction, what happens? Due to what?

A

the glenohumeral joint is locked due to the lateral conjuct rotation of the humerus in glenoid fossa

62
Q

Does deltoid do anything with the lateral rotation of the humerus? Then why?

A

No. All it does is to abduct with power. the rotation is due to the shape of the articular surface

63
Q

From 120-180 degree, what joint responsible for abduction?

A

scapularthoracic joint

64
Q

What is the movement of scapula during 120-180 abduction?

A

upward rotation

65
Q

What miuscles responsible for upward rotation of scapula?

A

serratus anterior

upper/lower part of trapezius

66
Q

What muscles responsible for adduction of shoulder?

A

lats/teres major and pec major

67
Q

Muscle for shoulder abduction

A

supraspinatus

middle deltoid

68
Q

Muscles for adduction

A

pec major

teres major/ lats

69
Q

Muscles for flexion

Extension

A

Anterior Deltoid/Pec major/Coracobrachialis/Short head of Bicep Brachii

Teres Major/ Post Deltoid/Lats

70
Q

Muscles for Internal rotation

external rotation

A

Subscapularis/ Teres Major/Lats/Anteriod deltoid

Post Deltoid/Infraspinatus/Teres MInor

71
Q

Quadriangle Space Border

A

Superior: Teres Minor

Inferior: Teres Major

Medial: Long head triceps

lateral: humerus

72
Q

What contents are in the quadrangular space?

A

posterior humerus circumflex artery

axillary

73
Q

Triangular Border

A

Sup: Teres Minor

Inf: Teres Major

Lateral: Long head triceps

74
Q

Contents in triangular space?

A

circumflex scapular artery

75
Q

What does suprascapular N supply?

A

supraspinatus

infraspinatus

glenohumeral joint

acromialclavicular joint

76
Q

Damage to long thoracic nerve results in?

A

wing scapula

serratus anterior damage -> scapula rotation

77
Q

What does axillary N supply to? Damage this nerve will result in what motion?

A

Deltoids/ Teres minor

acromioclavicular joint

external rotation/ Abduction

Gross Anatomy (28 decks)

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