9 - shoulder and glenohumoral movements

Question 1

4 major shoulder girdle joints

Answer 1

sternoclavicular
acromioclavicular
glenohumoral
scapulothoracic

Question 2

purpose of the clavicle

Answer 2

scapula movements are regulated by the clavicle
importatn for pulling, grasping, manipulation
secure base for precise movements of the arm
helps position the limb in the air more efficiently

Question 3

glenohumeral joints

Answer 3

ball and socket joint

moves through all joints

Question 4

socket of the glenohumoral joint

Answer 4

very shallow, not inherintly stable

Question 5

socket of the glenohumeral joint is deepened by

Answer 5

the fibrocartilagenous glenoid labrum

Question 6

secondary outer socket of the glnohumeral joint is formed by

Answer 6

acromion, coracoid and caracoacromial ligament

• prevents upward or posterior dislocation
  ligaments are loose, allows freedom at the cost of stability

Question 7

4 muscles of the rotator cuff

Answer 7

supraspinatous
infraspinatous
teres minor
subscapularis

Question 8

which rotator cuff muscles insert into the greater tubercle

Answer 8

supraspinatus
infraspinatous
teres minor

Question 9

which rotator cuff muscles inssert into the lesser tubercle

Answer 9

subscapularis

Question 10

movements performed by deltoid

Answer 10

all of them

Question 11

how many heads does deltoid have

Answer 11

3

Question 12

3 heads of the deltoid

Answer 12

clavicular, acromial, spinal

Question 13

corocoid process used to be called an atavistic epiphysis. why

Answer 13

used to be a whole bone between the scapula and sternum

coracoid process is therefore only a small part of a bone that we have lost through evolution, hence and atavism

Question 14

biceps longhead tendon acts as

Answer 14

acts like a 5th rotator cuff muscle

Question 15

features of the glenohumeral joint

Answer 15

incngruent ball and socket joint
very shallow, not inherently stable
deepened by the fibrocartilagenous glenoid labrum

Question 16

secondary outer socket is formed by

Answer 16

the acromion, coracid, and coracoacromial ligament