Test 3

Question 1

flexion and extension

Answer 1

180 degrees and 45 degrees in sagittal plane

Question 2

abduction/adduction

Answer 2

180 degrees in the frontal

Question 3

internal rotation/external rotation

Answer 3

70 degrees and 90 degrees

Question 4

horizontal abduction/adduction

Answer 4

90 degrees and 120 degrees in transverse plane

Question 5

glenoid labrum

Answer 5

fibrocartilage ring that attaches to the glenoid fossa, depends the articular cavity

Question 6

coracoacromial arch

Answer 6

1. formed by coracoacromial ligament and the acromion process
2. functions as a roof of GH joint
3. normally approximately 1 cm in depth from arch to the head
4. arch forms the subacromial space contains Supraspinatus muscle and tendon, subacromial bursa, long head of biceps and part of superior capsule

Question 7

axillary pouch

Answer 7

for head of humerus to slide down

Question 8

force couple

Answer 8

vertical pull of deltoid would pull head up against the acromion process and therefore cause shoulder impingement without help of the RTC muscles

Question 9

external rotation

Answer 9

head simultaneously rolls posterior and slides anteriorly on the glenoid fossa
*no scapulothoracic movement