Lacerations to Zones VIII and IX: It Is Not Just a Tendon Injury

Figure 5

Cadaveric gross dissection of dorsal forearm. The extensor pollicis brevis (EPB), extensor digit minimi (EDM), extensor digitorum comunis (EDC), extensor carpi ulnaris (ECU), extensor pollicis longus (EPL), and extensor incidis proprius (EIP) are labeled. The black arrow indicates the posterior interosseous nerve after exiting the arcade of Frohse. The white arrow indicates a posterior interosseous nerve (PIN) branch to EPL.