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ARTHROLOGY > quiz #2 - shoulder > Flashcards

quiz #2 - shoulder Flashcards

1
Q

4 joints that make up the shoulder

A

-glenohumeral (GH) joint
-scapulothoracic joint
-sternocalvicular (SC) joint
-acromioclavicular (AC) joint

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2
Q

glenohumeral (GH) joint

A

main shoulder movement

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3
Q

scapulothoracic joint

A

accessory joint
aids & stabilizes GH joint

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4
Q

sternoclavicular (SC) joint

A

accessory joint
attaches upper arm to axial skeleton via clavicle

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5
Q

acromioclavicular (AC) joint

A

accessory joint
attaches scapula to axial skeleton via clavicle

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6
Q

sternoclavicular (SC) joint - type

A

synovial, saddle or plane, diarthrosis, multiaxial

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7
Q

sternoclavicular (SC) joint - articular surfaces

A

convex sternal head of clavicle on concave manubrium of sternum

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8
Q

sternoclavicular (SC) joint - ligaments

A

joint capsule
sternoclavicular ligament (anterior & posterior)
interclavicular ligament
costoclavicular ligament
articular disc

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9
Q

sternoclavicular (SC) joint - movements

A

elevation, depression
protraction, retraction
rotation

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10
Q

acromioclavicular (AC) joint - type

A

synovial, plane, diarthrosis, triaxial

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11
Q

acromioclavicular (AC) joint - articular surfaces

A

convex acromion
convex lateral clavicle

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12
Q

acromioclavicular (AC) joint - ligaments

A

fibrous capsule
acromioclavicular ligament
coracoclavicular ligaments (trapezoid & conoid)
coracoacromial ligament

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13
Q

acromioclavicular (AC) joint - movements

A

elevation, depression
protraction, retracting
upward / downward rotation

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14
Q

glenohumeral (GH) joint - type

A

synovial, ball & socket, diarthrosis, multiaxial

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15
Q

glenohumeral (GH) joint - articular surfaces

A

convex head of humerus
concave glenoid cavity of scapula

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16
Q

glenohumeral (GH) joint - ligaments

A

ANTERIORLY: superior, middle, inferior humeral ligaments
SUPERIORLY: coracohumeral ligament, transverse humeral ligament

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17
Q

transverse humeral ligament function

A

holds tendon of biceps (long head) in the intertubercular groove

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18
Q

glenohumeral (GH) joint - movements

A

flexion, extension
ABD, ADD
horizontal ABD, ADD
medial & lateral rotation
circumduction

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19
Q

GH joint - shoulder bursa

A

subacromial / subdeltoid bursa
lies just below acromion & deltoid muscle

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20
Q

GH joint - glenoid labrum

A

made of fibrocartilage attached to rim of glenoid cavity
deepens cavity & increases surface of joint

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21
Q

GH joint movements coupled with …

A

movements in AC & SC joints at same time

22
Q

GH - loose packed / resting position

A

40-55 degrees ABD
30 degrees horizontal ADD (in scapular plane)

23
Q

GH - closed packed position

A

full ABD with lateral (external) rotation

24
Q

GH - capsular pattern of restriction

A

lateral (external) rotation
ABD
medial (internal) rotation

25
Q

GH ROM - FLEXION & EXTENSION

A

flexion: 160-180
extension: 50-60

26
Q

GH ROM - ABD & ADD

A

ABD: 170-180
ADD: 50-75

27
Q

GH ROM - horiztonal ABD/ flexion

A

130 degrees

28
Q

GH ROM - horizontal ADD/ extension

A

45 degrees

29
Q

GH ROM - INTERNAL & EXTERNAL rotation

A

internal: 80-90
external: 80-90

30
Q

GH - subacromial space

A

region between humerus & acromion
-roof is formed by CORACOACROMIAL LIGAMENT

31
Q

GH - subacromial space: 3 structures that live in the space

A

supraspinatus tendon
biceps (long head) tendon
subacromial bursa

32
Q

scapulothoracic joint - type

A

not a true joint, modified gliding
mostly consists of: muscle tissue (serratus anterior & subscapularis mm), CT, fascia, large bursa (subscapular bursa)

33
Q

scapulothoracic joint - articular surfaces

A

concave subscapular fossa surface on convex posterior ribs

34
Q

scapulothoracic joint - movements

A

sliding/ gliding
protraction, retraction
elevation, depression
upward & downward rotation of glenoid fossa
-upward (lateral/ external rotation)
-downward (medial/ internal rotation)

35
Q

scapulothoracic joint - loose packed position

A

when arm is resting at side
*no closed packed position for this joint

36
Q

scapulothoracic joint RHYTHM

A

scapulothoracic joint movement
-involves 3 joints moving together synchronized
(humerus, scapula, clavicle)

37
Q

PHASE 1 (ABD)

A

humerus: 30º ABD
scapula: minimal movement
clavicle: 0-5º elevation

38
Q

PHASE 2 (ABD)

A

humerus: 40º ABD
scapula: 20º rotation (upward)
clavicle: 15º elevation

39
Q

PHASE 3 (ABD)

A

humerus: 60º ABD
scapula: 30º rotation
clavicle: 30-50º posterior rotation, 15º upward elevation

40
Q

humeral-scapular ratio

A

for every two degrees of motion in humerus there is one degree of motion in scapula
= humeral-scapular ratio

41
Q

scapulothoracic joint - AROM protraction & retraction

42
Q

scapulothoracic joint - AROM elevation & depression

43
Q

scapulothoracic joint - AROM medial & lateral rotation

44
Q

scapulothoracic joint - functions

A

-increases ROM of shoulder for greater reach
-maintains length-tension relationship with deltoid muscle
-provides GH stability: GH head alignment
-injury prevention through shock absorption
-permits elevation of body

45
Q

muscles that move shoulder - FLEXION

A

anterior deltoid
biceps brachii
pectoralis major

46
Q

muscles that move shoulder - extension

A

posterior deltoid
triceps brachii

47
Q

muscles that move shoulder - ABD

A

middle deltoid
supraspinatus

48
Q

muscles that move shoulder - ADD

A

teres major
latissimus dorsi

49
Q

muscles that move shoulder - HORIZONTAL ADD

A

pectoralis major
coracobrachialis

50
Q

muscles that move shoulder - INTERNAL ROTATION

A

subscapularis
pectoralis major
latissimus dorsi

51
Q

muscles that move shoulder - EXTERNAL ROTATION

A

infraspinatus
teres minor

ARTHROLOGY (11 decks)

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