This final image is at the level of the distal row of carpal bones. Click here to see the approximate location of this cross-section on a standard radiograph. Note how the carpal bones form an arch that contributes three sides of the carpal tunnel.

Identify the following:

1. trapezium (tubercle is labeled)

2. trapezoid

3. capitate

4. hook of hamate

5. flexor retinaculum

The remaining structures are for your interest only.

6. median nerve

7. carpal tunnel

8. flexor carpi radialis tendon

9. flexor pollicis longus tendon

10. extensor carpi radialis longus tendon

11. radial artery

12. extensor digitorum / extensor indicis

13. hypothenar muscles