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Apparatus for determining sleep staging

  • US 6,157,857 A
  • Filed: 12/01/1998
  • Issued: 12/05/2000
  • Est. Priority Date: 07/24/1998
  • Status: Expired due to Fees
First Claim
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1. An apparatus for determining sleep staging comprising:

  • a transformation means to which an output signal (EEG(t)) of an EEG measuring device is supplied and which transforms the supplied EEG signal into a frequency range comprising a plurality of sub-bands including frequency ranges a, b, and c; and

    a processing means to which the EEG signal (EEG(f)) transformed into the frequency range is supplied from said transformation means and which ascertains values A, B and C representative of the frequency range a from 4.75 to 6.75 Hz, the frequency range b from 12.75 to 18.5 Hz and the frequency range c from 18.75 to 35.0 Hz or representative of least two of said frequency ranges and determines therefrom a sleep staging index SF.

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