The anterior compartment of the forearm - radioulnar joints (dave's notes)

Question 1

What does the proximal radioulnar joint consist of?

Answer 1

An annular ligament which attaches to the ulna and slings around the head of the radius

Question 2

What does the proximal radioulnar joint connect with?

Answer 2

The humerus

Question 3

What closes the distal radioulnar joint?

Answer 3

Triangular fibrocartilage

Question 4

Describe the capsule of the distal radioulnar joint

Answer 4

The capsule is loose and pouches up to the pronator quadratus

Question 5

What does the interosseous membrane join? How do its fibres run? What is the significance of this?

Answer 5

The membrane joins the osseous borders of both bones with fibres running from radius to ulna hence transmitting thrust from radius to ulna

Question 6

Describe the nature of the interosseous membrane in differing positions

Answer 6

Taut in pronation, slack in supination

Question 7

When do the radioulnar joints move?

Answer 7

With supination and pronation