An allied health professional who, in collaboration with an electroencephalographer, obtains interpretable recordings of a patient's nervous system functions.

The electrodiagnostic technologist takes a patient's history; applies adequate recording electrodes and uses optimal EEG (electroencephalograph), EP (evoked potential or a test of nerve response that uses electrodes placed on the scalp to measure brain reaction to a stimulus such as a touch), and PSG (polysomnogram or the recording of the monitoring of relevant normal and abnormal physiological activity during sleep) techniques; and documents the clinical conditions of patients.