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Method and apparatus for detection of nervous system disorders

  • US 8,165,683 B2
  • Filed: 12/12/2006
  • Issued: 04/24/2012
  • Est. Priority Date: 04/21/2006
  • Status: Active Grant
First Claim
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1. A method of detecting a neurological event, the method comprising:

  • acquiring an EEG signal comprising a stream of sampled data values;

    transforming the stream of sampled data values into a stream of data magnitude values;

    determining, with processing circuitry, a long-term representation of the EEG signal from the data magnitude values, comprising comparing a data magnitude value to a previous value of the long-term representation, and incrementing the previous value by a predetermined increment amount if the data magnitude value equals or exceeds the previous value, and decrementing the previous value by a predetermined decrement amount if the data magnitude value is less than the previous value;

    deriving a magnitude threshold from the long-term representation;

    comparing the data magnitude values to the magnitude threshold to produce a stream of comparator output values, each comparator output value indicating whether a given data magnitude value exceeds the magnitude threshold;

    calculating an event monitoring parameter based on a rolling window of comparator output values;

    comparing the event monitoring parameter to an onset threshold; and

    detecting a neurological event when the event monitoring parameter exceeds the onset threshold.

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