LKnative - Radial nerve block 
Supinator (cyan arrow), extensor digitorum (black arrow), extensor digiti minimi (green arrow), extensor carpi ulnaris (red arrow), extensor pollicis longus (magenta arrow), extensor pollicis brevis (grey arrow), extensor indicis (blue arrow), abductor pollicis longus (orange arrow)
8 – Anatomy: Muscles innervated by the deep branch of the radial nerve
The deep branch of the radial nerve becomes the posterior interosseous nerve of the forearm. This nerve innervates the following muscles:
– the supinator
– the extensor digitorum & extensor digiti minimi
– the extensor carpi ulnaris
– extensor pollicis longus & brevis
– extensor indicis
– abductor pollicis longus