Patent ID: 8335561

Claim:
A method of analyzing a subject for excessive daytime sleepiness over a test time period comprising the steps of: a) using at least one sensor to measure a subject's brain wave signals over a measurement time period, the measurement time period comprising a number of time segments; b) analyzing with a processor the subject's brain wave signals to estimate or determine a number from the power spectrum of the brain wave signals in the from about 0 to about 30 Hz range or a power spectrum profile from the signal components from the brain wave signals in the from about 0 to about 30 Hz range for each time segment; and c) making a determination of the degree of excessive daytime sleepiness based in part on the number or the power spectrum profile for the time segments over the measurement time period wherein the measurement time period begins at least about 2 minutes after the test time period begins and wherein the test time period is less than about 60 minutes.