Ligaments

Question 1

anterior and posterior sternoclavicular ligament

Answer 1

prevents A/P translation of the medial clavicle

Question 2

Posterior lamina of Costoclavicular Ligament

Answer 2

• limits elevation of distal clavicle
• when taut, may inferiorly glide the medial clavicle on the manubrium
• resists medial movement of the clavicle, absorbing force that would otherwise be imposed on the sternoclavicular disc

Question 3

Anterior lamina of Cocstoclavicular Ligament

Answer 3

• limits elevation of lateral clavicle
• when taut, may inferiorly glide the medial clavicle on the manubrium
• limits superiorly directed forces of the SCM and sternohyoid muscles

Question 4

Interclavicular Ligament

Answer 4

• limits excessive depression of distal clavicle
• limits superior gliding of medial clavicle on manubrium
• pprotects brachial plexus and sublavian artery