Which statement about the interosseous membrane is true?

Which statement about the interosseous membrane is true?

• A. It connects radius and ulna
• B. It connects tibia and fibula
• C. It forms the elbow joint
• D. It is a ligament in the wrist

Answer: (A)

The interosseous membrane is a fibrous sheet that spans between the radius and ulna along their lengths in the forearm, tying the two bones together while still allowing rotation during pronation and supination. This connection forms a type of syndesmosis and helps distribute load from the hand up through the forearm. It is not between the leg bones (tibia and fibula), it does not form the elbow joint (which is between the humerus and the two forearm bones), and it is not a wrist ligament (wrist ligaments connect carpal bones to the radius/ulna or to each other).

The interosseous membrane is a fibrous sheet that spans between the radius and ulna along their lengths in the forearm, tying the two bones together while still allowing rotation during pronation and supination. This connection forms a type of syndesmosis and helps distribute load from the hand up through the forearm. It is not between the leg bones (tibia and fibula), it does not form the elbow joint (which is between the humerus and the two forearm bones), and it is not a wrist ligament (wrist ligaments connect carpal bones to the radius/ulna or to each other).