Ch. 5: Bones and Joints of Shoulder Girldle

Question 1

Bones of shoulder girdle

Answer 1

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

Question 2

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

Answer 2

Sternoclavicular joint (SC joint)

Question 3

upward tip of scap is also known as _____

Answer 3

anterior tilt

Question 4

the superior transverse scap ligament does not pass a ______

Answer 4

joint

Question 5

which joint is not a true joint

Answer 5

scapulothoracic joint (ST)

Question 6

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

Answer 6

muscular stability

Question 7

what’re the articulating surfaces of the glenohumeral joint

Answer 7

glenoid fossa of scap and head of humerus

Question 8

whats the classification of the glenohumeral joint

Answer 8

multi axial, synovial, ball and socket

Question 9

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

Answer 9

flexion/extension
medial-lateral axis

Question 10

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

Answer 10

horizontal abduction/adduction
vert. axis

Question 11

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

Answer 11

adduction and abduction
ANT/POST axis

Question 12

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

Answer 12

no plane, mechanical axis of humerus

Question 13

the 5 ligs. in GH JT

Answer 13

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

Question 14

3 bursae and labrum of GH JT

Answer 14

GH labrum, subdeltoid bursa, subacromial bursa, subscapular bursa

Question 15

the GH capsule attaches where on the humerus and scap

Answer 15

anatomical neck of humerus and circumference of the glenoid fossa

Question 16

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

Answer 16

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

Question 17

where is the axillary recess

Answer 17

inferior aspect of the GH JT capsule

Question 18

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

Answer 18

blend

Question 19

location and func. of the glenoid labrum

Answer 19

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

Question 20

3 feats. of GH lig.

Answer 20

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

Question 21

3 feats. of the coracohumeral lig.

Answer 21

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

Question 22

3 bands of the GH lig

Answer 22

SUP, middle, and INF

Question 23

2 feats. of the transverse humeral lig.

Answer 23

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

Question 24

2 feats of the coracoacromial lig

Answer 24

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

Question 25

where is the subdeltoid bursa

Answer 25

sits b/w acromion, PROX humerus, and deltoid

Question 26

where is the subacromial bursa

Answer 26

b/w acromion and supraspinatus tendon

Question 27

where is the subscapular bursa

Answer 27

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

Question 28

articulating surfaces of AC JT

Answer 28

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

Question 29

structural and functional classifications of AC JT

Answer 29

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

Question 30

mvts of AC JT permitted in frontal plane

Answer 30

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

Question 31

mvts of AC JT permitted in sagittal plane

Answer 31

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

Question 32

mvts of AC JT in transverse plane (roughly)

Answer 32

scap. protraction and retraction

Question 33

Ligs. of the AC JT

Answer 33

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

Question 34

how many bursae involved in AC jt

Answer 34

none

Question 35

feats of the AC jt capsule

Answer 35

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

Question 36

feats of the superior transverse scapular lig

Answer 36

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

Question 37

feats of the acromioclavicular lig

Answer 37

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

Question 38

feats of coracoclavicular ligs

Answer 38

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

Question 39

Whats a FOOSH

Answer 39

Fall Onto an OutStretched Hand

Question 40

articulating surfaces of the sternoclavicular JT (SC JT)

Answer 40

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

Question 41

classification of SC JT

Answer 41

S: biaxial, saddle, synovial F: Diarthroidal

Question 42

mvts. permitted of SC Jt

Answer 42

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

Question 43

ligaments of SC JT

Answer 43

Capsule, sternoclavicular lig, costoclavicular lig, interclavicular lig

Question 44

feats of interclavicular lig

Answer 44

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

Question 45

feats of costoclavicular lig

Answer 45

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

Question 46

feats of sternoclavicular lig

Answer 46

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

Question 47

SC capsule features

Answer 47

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

Question 48

feat of the scapular thoracic joint

Answer 48

not a true joint

Question 49

which end of clav. is more bulbous and circular

Answer 49

sternal end

Question 50

what mm is the INF groove on the clav. for

Answer 50

subclavius