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Influence of Repetitive Light Stimulation on Alpha Dynamics

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These file attachments have been under embargo and were made available to the public after the embargo was lifted on 16 February 2011.

Author: Milanowski ,P. · Garcia Molina, G. · Chestakov, D.
Type:report
Date:2010-08-31
Embargo lifted:2011-02-16
Publisher: Philips Research
Institution: Philips Research
Identifier: TN 2010/00270
Keywords: alpha wave · brain · cognitive enhancement · electroencephalogram · light stimulation
Rights: (c) Koninklijke Philips Electronics N.V.

Abstract

A relative high power in the alpha band (8 - 13Hz) at a particular EEG position is believed to indicate an active inhibitory state of the corresponding cortical site. According to this hypothesis an active inhibitory state corresponds to a lower engagement of the cortical site and is accompanied by a higher engagement of other sites (possibly neighboring ones). In this project the influence of a repetitive visual stimulation on the alpha band was investigated. A special attention was paid to the difference between the individual alpha frequency and alpha power before and after the stimulation. Data was analyzed by using the matching pursuit time-frequency distribution that provides better resolution in time and frequency than STFT or Wigner-Ville transforms.

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