Apparatus for determining a vigilance state of a subject such as a driver of a vehicle or the like. The apparatus includes means (1 to 11) for monitoring one or more physiological variables such as EEG, EMG and EOG signals associated with the subject. The apparatus also includes means (13 to 16) for...http://www.google.es/patents/US6575902?utm_source=gb-gplus-sharePatente US6575902 - Vigilance monitoring system
