Allengers Virgo series of EEG test system is a digital signal processing and brain mapping technique. The device is intended to acquire, store, and transfer biophysical parameters to EEG machines for the purpose of assisting the diagnosis of neurological and sleep disorders, measurement, and display of cerebral activities for EEG and Sleep Studies. This data may be used by the clinician in Sleep Disorders, Epilepsies, and other related disorders as a diagnostic tool.