Shoulder primary structures

Question 1

This ligament forms a roof over the humeral head and helps to

• limit superior translation of the humeral head
• prevent separation of the AC jt

Answer 1

coracoacromial ligament

Question 2

This ligament surrounds the AC jt on all sides and helps to control horizontal movements of the clavicle

Answer 2

acromioclavicular ligament

Question 3

This ligament acts as the primary support of the AC joint, limiting superior translation of the clavicle

Answer 3

coracoclavicular ligament

Question 4

The coracoclavicular ligament consists of:

Answer 4

• conoid ligament

- trapezoid ligament

Question 5

This ligament helps to unite the supraspinatus and subscapularis tendons and limits inferior translation of the humeral head

Answer 5

coracohumeral ligament

Question 6

This ligament attaches between the medial portion of the clavicle and the first rib and is the primary supporting ligament for the SC jt

Answer 6

costoclavicular ligament

Question 7

This ligament limits shoulder adduction as well as ER with shoulder in 0-45˚ abduction

Answer 7

superior glenohumeral ligament

Question 8

This ligament limits shoulder ER in 45-90˚abduction

Answer 8

middle glenohumeral ligament

Question 9

This ligament has an anterior and posterior band that limits ER/IR above 90˚ abduction. Between the two bands is an axillary pouch that limits inferior translation when the shoulder is above 90˚ abduction

Answer 9

interior glenohumeral ligament

Question 10

This consists of a dense fibrous connective tissue that is often damaged with recurrent shoulder instability

Answer 10

glenoid labrum

Question 11

From where does the joint capsule arise?

Answer 11

arises from the glenoid fossa and glenoid labrum to blend with the RC muscles

Question 12

The joint capsule is twice as large as the size of the humeral head and is reinforced by the

Answer 12

• GH ligaments

- coracohumeral ligament

Question 13

What is the rotator interval?

Answer 13

space in the anterosuperior shoulder that consists of and is bordered by

• coracohumeral ligament
• superior GH ligament
• jt capsule
• supraspinatus/subscapularis tendons

Question 14

Where is the subacromial bursa located?

Answer 14

• over supraspinatus tendon/distal mm belly

- under acromion and deltoid

Question 15

This bursa overlies the anterior jt capsule and lies beneath the subscapularis muscle

Anterior shoulder fullness may indicate articular effusion 2/2 distention of the bursa

Answer 15

subscapular bursa

Question 16

This ligament spans the bicipital groove

Answer 16

transverse humeral ligament