Surgery – Diagnostic testing – Detecting brain electric signal
Patent
1998-04-10
2000-05-30
Nasser, Robert L.
Surgery
Diagnostic testing
Detecting brain electric signal
600300, A61B 504
Patent
active
06070098&
ABSTRACT:
A method and apparatus for determining, monitoring and predicting levels of alertness by detecting microsleep episodes includes a plurality of channel processing units and a channel combining unit. Each of the channel processing units receives an information channel which conveys information associated with the mental and behavorial state of the subject, such as for example an EEG channel, and classifies the information into a distinct category. Such categories may include microsleep, non-microsleep, one or more of a plurality of stages of sleep, one or more of a plurality of stages of wakefulness, or a transition state characterized by a transition from one of the aforementioned states to another. Each of the channel processing units includes a neural network which has been trained with a set of example input/result vector pairs. The example input/result vector pairs are generated by correlating actual information channel outputs with observed fatigue related events such as nodding off, head snapping, multiple blinks, blank stares, wide eyes, yawning, partial and complete prolonged eyelid closures, and slow rolling eye movements.
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Guttkuhn Rainer
Heitmann Anneke M.
Moore-Ede Martin C.
Trutschel Udo E.
Circadian Technologies, Inc.
Nasser Robert L.
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