35

Question 1

What does the joint capsule of the proximal radio-ulnar joint do?

Answer 1

The joint capsule encloses the joint and is continuous with the elbow joint capsule.

Question 2

What lines the deep surface of the joint capsule of the proximal radio-ulnar joint?

Answer 2

The synovial membrane lines the deep surface of the fibrous layer of the joint capsule and continues as the synovial membrane of the elbow joint.

Question 3

What is the function of the anular ligament at the proximal radio-ulnar joint?

Answer 3

The anular ligament surrounds the head of the radius, forming a collar that allows the radius to rotate within the radial notch.

Question 4

What movements occur at the proximal radio-ulnar joint?

Answer 4

Pronation and supination of the forearm occur at the proximal radio-ulnar joint

Question 5

What happens to the radius during pronation and supination?

Answer 5

During pronation, the radius rotates around the ulna, and during supination, the radius uncrosses to a parallel position with the ulna.