Spectral and bispectral analysis of the EEG rhythms in basal conditions and during photic stimulation

A. M. Bianchi, S. C. Molteni, F. Panzica, E. Visani, S. Franceschetti, S. Cerutti

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

Abstract

The aim of the present study is the quantification of the relationships and the phase coupling among spectral peacks in the EEG signal at different sites of the scalp. 10 normal subjects underwent the study. The multi-channel EEG signal was recorded during basal conditions and during photic stimulation. The stimulation frequency (SF) has been chosen related to the single subject's spontaneous alpha rhythm (SF = α, SF = 2α, SF = α/2) and not related to the a rhythm (SF = 14 Hz). Spectral and bispectral analysis put into evidence that, in basal conditions, with closed eyes, the spontaneous a rhythm is generated by independent oscillators in the occipital and frontal regions. In addition the β rhythm in the spectra seems an harmonic component linked to the former one. During photic stimulation the spontaneous a rhythm is drastically decreased, and the harmonics are lowered, while frontal and occipital responses seem to synchronize. In addition the frontal lobe seems able to generate sub-harmonics which could be related to the genesis of generalized seizures in predisposed subjects.

Original languageEnglish
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Pages574-577
Number of pages4
Volume26 I
Publication statusPublished - 2004
EventConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
Duration: Sep 1 2004Sep 5 2004

Other

OtherConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004
CountryUnited States
CitySan Francisco, CA
Period9/1/049/5/04

Keywords

  • Bispectral analysis
  • Multichannel EEG
  • Photic stimulation

ASJC Scopus subject areas

  • Bioengineering

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    Bianchi, A. M., Molteni, S. C., Panzica, F., Visani, E., Franceschetti, S., & Cerutti, S. (2004). Spectral and bispectral analysis of the EEG rhythms in basal conditions and during photic stimulation. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 26 I, pp. 574-577)