Dorsal aspect of right forearm

Origins of deep layer of extensor muscles

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Image #108-6

Dorsal aspect of right forearm

Origins of deep layer of extensor muscles

1. Deep branch of radial nerve
2. Supinator muscle (insertion)
3. Dorsal interosseous artery
4. Abductor pollicis longus muscle (area of origin)
5. Radius
6. Antebrachial interosseous membrane
7. Extensor carpi radialis brevis muscle (tendon)
8. Extensor pollicis brevis muscle
9. Anterior interosseous artery
10. Dorsal interosseous nerve (terminal part)
11. Compartment for common extensor digitorum muscle and extensor indicis muscle
12. Dorsal carpal ligament
13. Compartment for extensor digiti minimi muscle
14. Compartment for extensor carpi ulnaris muscle
15. Ulna
16. Area of origin of extensor indicis muscle
17. Area of origin of extensor pollicis longus muscle