Electrodiagnostic studies.

This article overviews electrodiagnostic tests that provide evidence-based data in the treatment and management of abnormalities in nerves and muscles. There is a focused review on cardiac tests, nerve-conduction tests, low-back pain tests, seizure and epilepsy tests, and obstructive sleep apnea electrodiagnostic tests. Case reports demonstrate how these electrophysiologic tests can provide specific data about the location and underlying causative factors of abnormalities in the nerves and muscles that routine diagnostic tests cannot differentiate.