Central Alpha Bicoherence Is Reduced in Photosensitive Subjects

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The photic driving response is known to induce epileptiform activity in photosensitive subjects and a recent hypothesis suggests that a reduced inhibitory effect of the alpha oscillations may be associated to this phenomenon. In this work, we studied the linear and non-linear spectral characteristic of the physiological alpha rhythms during a visual stimulation protocol in a group of twelve healthy and eight treated photosensitive subjects. Results confirmed the desynchronization of the individual alpha power during stimulation over the occipital region in both the groups and over the central for the PS subjects. A reduced bicoherence of the central alpha rhythm in PS subjects was found, suggesting the presence of a different behavior in the cortical structures involved in the generation of the alpha oscillations, both at rest and during visual stimulation.

Original languageEnglish
Title of host publication15th Mediterranean Conference on Medical and Biological Engineering and Computing – MEDICON 2019 - Proceedings of MEDICON 2019
EditorsJorge Henriques, Paulo de Carvalho, Nuno Neves
PublisherSpringer
Pages1123-1128
Number of pages6
ISBN (Print)9783030316341
DOIs
Publication statusPublished - 2020
Event15th Mediterranean Conference on Medical and Biological Engineering and Computing, MEDICON 2019 - Coimbra, Portugal
Duration: Sep 26 2019Sep 28 2019

Publication series

NameIFMBE Proceedings
Volume76
ISSN (Print)1680-0737
ISSN (Electronic)1433-9277

Conference

Conference15th Mediterranean Conference on Medical and Biological Engineering and Computing, MEDICON 2019
Country/TerritoryPortugal
CityCoimbra
Period9/26/199/28/19

Keywords

  • Alpha
  • Bicoherence
  • Photosensitivity

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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