pure motor symptoms of radial nerve injury

injury to the deep branch of the radial nerve at the supinator muscle can be due to ☆repetitive pronation/spination of the forearm

involved: posterior interosseous nerve→ weakness on finger and thumb extension

not involved: extensor carpi radialis longus(responsible for wrist extension), superficial branch of radial nerve(cutaneous sensory branch)

musculoskeletal anatomy UWorld