Shoulder Joint and ligaments

Question 1

shoulder has high degree of what, but is very what?

Answer 1

Shoulder has high degree of mobility, but is very unstable.

Question 2

The coracohumeral ligament spans what bone of shoulder jt?

Answer 2

bicipital grove of humerus

Question 3

coracohumeral ligament provides

Answer 3

anteroinferior stability of GH jt

Question 4

GH ligament (ant, midd, and anteroinf bands) reinforces

Answer 4

anterior capsule and provides stability to shoulder jt in most planes of movement

Question 5

coracohumeral ligament is located where?

Answer 5

coracohumeral ligament is located superior to GH jt

Question 6

coracohumeral ligament protects what?

Answer 6

muscles, tendons, nerves and blood supply of this region and prevents superior dislocation of humeral head

Question 7

Acromioclavicular ligament is major ligament that provides

Answer 7

stability to the AC jt

Question 8

What ligament prevents superior dislocation of AC jt?

Answer 8

coracoclavicular ligament

Question 9

What ligament helps strengthen the capsule of the sternoclav jt?

Answer 9

sternoclav ligament

Question 10

The costoclavicular ligament connects what

Answer 10

first rib and clavicle

Question 11

interclav ligament connects

Answer 11

2 clavicles and manubrium

Question 12

location of subacromial bursa

Answer 12

lies betwqeen supraspinatus, deltoid tendons, acromion, allows gliding and cushioning of these structures specill yduring should abd

Question 13

4 jts of shoulder

Answer 13

acromioclav, sternoclav, GH, scapulothoriacic jt

Question 14

GH is what kind of jt?

Answer 14

bALL AND SOCKET

Question 15

GH consists of what?

Answer 15

spherical head of humerus w/ small, shallow, and somewhat pear-shaped glenoid fossa of scapula.

Question 16

Glenoid labrum is what?

Answer 16

of scapula that deepens the fossa and cushions against impact of humeral head during forceful movements

Question 17

AC Jt is what?

Answer 17

a plane syn jt of the articulation of the acromion and the distal end of clavicle

Question 18

AC jt moves in how many planes with what?

Answer 18

3 planes of motion with scapulothoracic motion

Question 19

What articulation is the sternoclav jt?

Answer 19

Articulation of proximal clavicle w/ sternum and cartilage of first rib

Question 20

SC jt is what kind of synovial jt?

Answer 20

saddle jt

Question 21

The SC Jt moves how?

Answer 21

SC jt moves in sync w/ other 3 jts

Question 22

SC jt provides ….

Answer 22

only bony connection between humerus and axial skeleton

Question 23

SCPT JT is not a true

Answer 23

jt, but a functional (physiologcal) jt

Question 24

SCPT JT is formed by the

Answer 24

articulation of scapula w/ thoracic cage.

Question 25

Any movement of SCPT jt results in movement of

Answer 25

AC, GH, SC jt

Question 26

What does SCPT jt provide?

Answer 26

mobility and stability for the orientation of glenoid fossa and humeral head for arm movements in all planes

Question 27

Where is center of ROT of GH jt?

Answer 27

humeral head w/in glenoid fossa

Question 28

describe scapulohumeral rhythm

Answer 28

full abd of arm requires simultaneus movement of GH and scapulothoraic jts (dual movement0

Question 29

Scapulohumeral rhythm allows what?

Answer 29

Scapulohumeral rhythm allows a greater abd ROM, maintains optimal length-tension relationsjips of GH muscles, and prevents impingement btween greater tubercle of humerus and acromion.

Question 30

Scapulohumeral rhythm makes arm elevation overhead possible how?

Answer 30

after 100 - 120 abd, upward rot of scapula frontal plane causes glenoid fossa of scapula to face upward = aqrm above head