Posterior Interosseous Nerve Test

To check the posterior interosseous nerve, perform specific clinical tests such as resisted middle finger extension or wrist extension against resistance. These maneuvers help assess the nerve's function and identify potential impairments.

Symptoms of posterior interosseous nerve injury include weakness in wrist and finger extension, difficulty with fine motor tasks, and pain around the lateral elbow and forearm.

The posterior interosseous nerve primarily innervates the extensor muscles of the forearm, including those responsible for wrist and finger extension. It plays a crucial role in motor function within the upper extremity.