Relaxation and phase space singularities in time series of human magnetoencephalograms as indicator of photosensitive epilepsy

R. M. Yulmetyev, P. Hänggi, D. G. Yulmetyeva, S. Shimojo, E. V. Khusaenova, K. Watanabe, J. Bhattacharya

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To analyze the crucial role of fluctuation and relaxation effects for the function of the human brain we studied some statistical quantifiers that support the information characteristics of neuromagnetic brain responses (magnetoencephalogram, MEG). The signals to a flickering stimulus of different color combinations have been obtained from a group of control subjects which is then contrasted with those of a patient suffering photosensitive epilepsy (PSE). We found that the existence of the specific stratification of the phase clouds and the concomitant relaxation singularities of the corresponding nonequilibrium dynamics of the chaotic behavior of the signals in separate areas in a patient provide likely indicators for the zones which are responsible for the appearance of PSE.

Original languageEnglish
Pages (from-to)443-454
Number of pages12
JournalPhysica A: Statistical Mechanics and its Applications
Issue number2
Publication statusPublished - 2007 Sep 15



  • Discrete non-Markov stochastic processes
  • Human brain
  • Magnetoencephalograms
  • Photosensitive epilepsy
  • Relaxation and phase space singularities

ASJC Scopus subject areas

  • Statistics and Probability
  • Condensed Matter Physics

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