Shoulder Region

Question 1

What causes painful arc syndrome?

Answer 1

Inflamed subacromial bursa or rotator cuff tendons becoming impinged between acromion and head of humerus.

Question 2

In which direction is the humerus most likely to disclocate?

Answer 2

Anteriorly, due to relative lack of support compared to post and superior

Question 3

Name the ligaments of the shoulder joint

Answer 3

Extra-capsular: coraco-acromial, coraco-humeral, transverse humeral. Intra-capsular: superior, middle, inferior gleno-humeral ligaments (on anterior surface)

Question 4

Where do the three gleno-humeral ligaments originate and insert?

Answer 4

Origin: glenoid labrum. Insert: anatomical neck of humerus.

Question 5

What is the role of the shoulder joint ligaments?

Answer 5

Reinforce capsule and stabilise the joint

Question 6

What is the innervation of the rotator cuff muscles?

Answer 6

Suprascapular

Question 7

What degree is painful arc syndrome?

Answer 7

50-130 degrees