Which SI point is located at the ulnar border of the wrist, in the depression between the head of the ulna and the triquetral bone?

• A. SI 5
• B. SI 6
• C. SI 7
• D. SI 8

Answer: (A)

The point described sits at the ulnar border of the wrist in the hollow between the head of the ulna and the triquetral bone. That precise wrist depression is SI 5. Other listed SI points lie in different segments along the channel (more proximal on the forearm or at the elbow), so they do not match this carpal location.