Electrodiagnosis of plexopathy.

Electrodiagnostic evaluation of the brachial and lumbosacral plexus can be challenging even to an experienced practitioner. Detailed attention to anatomy and correlation with the history and physical examination results are needed to have a comprehensive differential diagnosis and to develop reliable conclusions. Electrophysiologic techniques, when applied appropriately, provide invaluable functional information after a plexus injury. Electrodiagnostic evaluation of a plexus injury should be systematic and comprehensive to provide the maximum precision for localization, extent of involvement, and severity of injury.