ac and sc joint

Question 1

what joint is circled in red?

Answer 1

sternoclavicular joint

Question 2

what is the articular disc?

Answer 2

• fibrocartilage
• reinforced with 2 SC ligaments
• reduces compression and sheer joint forces in synovial joint

Question 3

label the ligaments present, what is this ligaments pair not shown in the image? What motion does each ligament limit?

Answer 3

1. Anterior Sternocalvicular Ligament - limits retraction
2. Posterior Sternoclavicular Ligament - limits protraction

Question 4

label the ligament, what motion does it limit?

Answer 4

1. Costo-clavicular Ligament - holds medial end of clavicle down

Question 5

where is the articular disc in the AC Joint?

Answer 5

between the acrimion and the clavicle

Question 6

identify the ligament, is this ligament a strong stabilizer

Answer 6

acromioclavicular ligament - no

Question 7

idenitfy the coraco-clavicular ligaments

Answer 7

1. conoid ligament
2. trapezoid ligament
3. coraco-acromial ligament

Question 8

what is the function of the conoid ligament

Answer 8

• prevents superior translation of lateral end of clavicle relative to scapula
• holds lateral end of clavicle to scapula

Question 9

what is the function of the trapezoid ligament

Answer 9

• prevent superior translation of lateral end of clavicle relative to scapula
• holds lateral end of clavicle to scapula

Question 10

what is the function of the coraco-acromial ligament?

Answer 10

• this ligament does not support a joint!!!!!