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Real-time filtering for the estimation of steady-state visual evoked brain potentials

STS Instructor Authored by Thomas Collura

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Check out this Knowledge Base article from StressTherapy Solutions: Real-time filtering for the estimation of steady-state visual evoked brain potentials.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Authors
Collura TF
Journal
IEEE Transactions on Biomedical Engineering
Year
1990
Protocol
comb filtering of steady-state visual evoked potentials

Key findings

  • Steady-state visual evoked potentials can be estimated continuously rather than by averaging
  • A comb filter isolates the response's main harmonics
  • The method tracks moment-to-moment changes in the response
  • Demonstrated on human subjects

DOI 10.1109/10.55670 → PubMed 2354847 →

A brief engineering paper showing that the brain's response to a repeating visual stimulus (between 2 and 20 flashes per second) can be measured in real time with a simple filter, without lengthy averaging. A comb filter lets through the key harmonic frequencies of the response, giving an estimate of the evoked activity and following how it changes over time. Tests on human volunteers supported the method.