Ligaments of the Shoulder Girdle

Question 1

What three muscles attach to the coracoid process?

Answer 1

1) Short head biceps brachii
2) Pectoralis Minor
3) Coracobrachialis

Question 2

What are the three ligaments that come off the coracoid process?

Answer 2

1) Coracoclavicular ligaments (Trapezoid & Conoid)
2) Coracoacromial ligament (arch)
3) Coracohumeral ligament

Question 3

What is the name of the ligament that doesn’t cross a joint, but rather provides a protective arch?

Answer 3

Coracoacromial ligament

Question 4

1) What are the attachments of the acromioclavicular ligaments?
2) What movement does it restrict?

Answer 4

1) Acromion of the scapula and lateral end of clavicle

2) Thickens AC joint capsule, restricts posterior translation and posterior axial rotation at the AC joint

Question 5

1) What are the attachments of the Trapezoid ligament?

2) What movement does it restrict?

Answer 5

1) Coracoid process to trapezoid line of clavicle

2) Limits medial and inferior movement of scapula relative to clavicle

Question 6

1) What are the attachments of the Conoid ligament?

2) What movement does it restrict?

Answer 6

1) Coracoid process to conoid tubercle of clavicle

2) Limits inferior movement of scapula relative to clavicle

Question 7

1) What are the attachments of the Interclavicular ligament?

2) What movement does it restrict

Answer 7

1) Medial end of clavicle to medial end of clavicle, joining top of manubrium
2) Limits depression of clavicle

Question 8

1) What are the attachments of the Posterior SC Ligament?

2) What movement does it restrict?

Answer 8

1) Superior and posterior aspect of sternal end Clavicle to posterior superior aspect of Manubrium
2) Reinforces joint capsule posteriorly, limits horizontal flexion (protraction) of the clavicle

Question 9

1) What are the attachments of the Anterior SC Ligament?

2) What movement does it restrict?

Answer 9

1) Superior and anterior aspect of sternal end of the Clavicle to the anterior superior aspect of manubrium
2) Reinforces joint capsule anteriorly, limits horizontal extension (retraction) of the clavicle

Question 10

1) What are the attachments of the Costoclavicular ligament?

2) What movement does it restrict?

Answer 10

1) First costal cartilage and the underside of the medial end of the clavicle
2) Limits elevation of the clavicle

Question 11

What are the 4 main ligaments that surround the sternoclavicular joint?

Answer 11

1) Costoclavicular ligament
2) Anterior SC ligament
3) Posterior SC ligament
4) Interclavicular ligament

Question 12

What ligaments form the Glenohumeral Joint Capsule?

Answer 12

Superior Glenohumeral Ligament
Middle Glenohumeral Ligament
Inferior Glenohumeral Ligament (anterior, axillary and posterior bands)

Question 13

What are the attachments of the Glenohumeral Ligaments (superior, middle, inferior)?

Answer 13

Rim of glenoid cavity of scapula to anatomical neck of the humerus

Question 14

1) What are the attachments of the Coracohumeral Ligament?

2) What movement does it restrict?

Answer 14

1) Coracoid process to the Lesser Tubercle of the Humerus

2) Resists end of range external rotation, flexion and extension. Blends with supraspinatus tendon.

Question 15

1) What are the attachments of the Transverse Humeral Ligament?
2) What is its purpose?

Answer 15

1) Lesser tubercle of humerus to greater tubercle of humerus

2) Holds the tendon of the long head of biceps brachii muscle in the intertubercular groove.

Question 16

What 2 key ligaments tauten as a result of scapulohumeral rhythm when abducting the arm?

Answer 16

First the costoclaviculat ligament, preventing further elevation of the clavicle.
Second the conoid ligament, pulling the clavicle into retraction and posterior rotation (crankshaft mechanism).