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MS 100 > Ch. 5: Bones and Joints of Shoulder Girldle > Flashcards

Ch. 5: Bones and Joints of Shoulder Girldle Flashcards

1
Q

Bones of shoulder girdle

A

Clavicle, scap, humerus (not part of the shoulder girdle proper but depends on the girdle for full motion)

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2
Q

The only skeletal attachment of the shoulder girdle to the thorax is the _____

A

Sternoclavicular joint (SC joint)

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3
Q

upward tip of scap is also known as _____

A

anterior tilt

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4
Q

the superior transverse scap ligament does not pass a ______

A

joint

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5
Q

which joint is not a true joint

A

scapulothoracic joint (ST)

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6
Q

there is no posterior connection of the upper extremity to the thorax, instead it relies primarily on _____ _____

A

muscular stability

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7
Q

what’re the articulating surfaces of the glenohumeral joint

A

glenoid fossa of scap and head of humerus

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8
Q

whats the classification of the glenohumeral joint

A

multi axial, synovial, ball and socket

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9
Q

what’re the mvts of the glenohumeral joint in the sagittal plane. axis?

A

flexion/extension
medial-lateral axis

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10
Q

what’re the mvts of the GH joint in the transverse plane. axis?

A

horizontal abduction/adduction
vert. axis

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11
Q

what mvts of GH JT occur in the frontal plane. axis?

A

adduction and abduction
ANT/POST axis

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12
Q

INT/EXT ROT’N of GH JT occurs in what plane and axis

A

no plane, mechanical axis of humerus

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13
Q

the 5 ligs. in GH JT

A

capsule, GH lig., coracohumeral lig., transverse humeral lig., and the coracoacromial lig.

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14
Q

3 bursae and labrum of GH JT

A

GH labrum, subdeltoid bursa, subacromial bursa, subscapular bursa

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15
Q

the GH capsule attaches where on the humerus and scap

A

anatomical neck of humerus and circumference of the glenoid fossa

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16
Q

when is the axillary recess of the GH JT capsule taut and loose

A

taut: arm if full abduction
loose: arm if full adduction

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17
Q

where is the axillary recess

A

inferior aspect of the GH JT capsule

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18
Q

the tendons of the supraspinatus, infraspinatus, teres minor, and subscapularis ______ with the GH JT capsule

A

blend

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19
Q

location and func. of the glenoid labrum

A

forms a lip around the glenoid fossa to deepen it. Increases congruency b/w opposing bones

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20
Q

3 feats. of GH lig.

A

partially capsular, on the ANT surface of JT, Z-shaped with 3 bands, limits EXT ROT’N and horizontal abduction

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21
Q

3 feats. of the coracohumeral lig.

A

extracapsular, 2 bands (SUP and INF), supports dependent arm against gravity

22
Q

3 bands of the GH lig

A

SUP, middle, and INF

23
Q

2 feats. of the transverse humeral lig.

A

extracapsular, achors the long head of biceps tendon within intertubercular sulcus

24
Q

2 feats of the coracoacromial lig

A

extracapsular, forms portion of the roof of the subacromial arch and therefore limits elevation of the humerus

25
Q

where is the subdeltoid bursa

A

sits b/w acromion, PROX humerus, and deltoid

26
Q

where is the subacromial bursa

A

b/w acromion and supraspinatus tendon

27
Q

where is the subscapular bursa

A

b/w glenohumeral lig./anterior JT capsule and subscapularis tendon

28
Q

articulating surfaces of AC JT

A

acromial facet of clavicle and clavicular facet of acromion (medial acromion)

29
Q

structural and functional classifications of AC JT

A

S: non-axial, plane, synovial
F: diarthrodial

30
Q

mvts of AC JT permitted in frontal plane

A

SUP/INF scap ROT’N,
scap. elevation and depression

31
Q

mvts of AC JT permitted in sagittal plane

A

upward tip of scap. (ANT tilt)
occurs in flexion of humerus

32
Q

mvts of AC JT in transverse plane (roughly)

A

scap. protraction and retraction

33
Q

Ligs. of the AC JT

A

capsule, acromioclavicular lig, coracoclavicular ligs (conoid and trapezoid), SUP transverse scapular lig

34
Q

how many bursae involved in AC jt

A

none

35
Q

feats of the AC jt capsule

A

relatively weak, disc within (usually gone by 40 yrs)

36
Q

feats of the superior transverse scapular lig

A

extracapsular, doesn’t cross a jt, spans suprascapular notch

37
Q

feats of the acromioclavicular lig

A

extracapsular, INF and SUP bands, limits one bone over riding another

38
Q

feats of coracoclavicular ligs

A

conoid lig attaches to the clav. more medially, trapezoid lig attaches to clav more laterally, extracapsular, helps disperse force in FOOSH

39
Q

Whats a FOOSH

A

Fall Onto an OutStretched Hand

40
Q

articulating surfaces of the sternoclavicular JT
(SC JT)

A

sternal facet of clavicle,
clavicular facet of manubrium (superolateral manubrium), costal cartilage of rib 1

41
Q

classification of SC JT

A

S: biaxial, saddle, synovial
F: Diarthroidal

42
Q

mvts. permitted of SC Jt

A

clav. elevation/depression (frontal/AP axis),
clav. PROTR/RET (transverse/vert. axis),
clav. ROT’N (no plane/mech. axis of clav.)

43
Q

ligaments of SC JT

A

Capsule, sternoclavicular lig, costoclavicular lig, interclavicular lig

44
Q

feats of interclavicular lig

A

extracapsular, spans sternal notch, limits SUP/INF clavicular displacement

45
Q

feats of costoclavicular lig

A

extracapsular, goes from costal cartilage of rib 1 to INF clavicle (impression for costoclavicular lig), limits clav. motion at 90 degrees GH abduction

46
Q

feats of sternoclavicular lig

A

extracapsular, ANT/POST bands, limits ANT/POST clavicular mvt.

47
Q

SC capsule features

A

intracapsular disc (attached superiorly to clav. and inferiorly to costal cartilage), disc divides the JT space into 2 (MED/LAT JT spaces), func. of disc —–> shock absorption

48
Q

feat of the scapular thoracic joint

A

not a true joint

49
Q

which end of clav. is more bulbous and circular

A

sternal end

50
Q

what mm is the INF groove on the clav. for

A

subclavius

MS 100 (15 decks)

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