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Cross-correlation markers in stochastic dynamics of complex systems

Panischev, O. Yu.; Demin, S. A. and Bhattacharya, Joydeep. 2010. Cross-correlation markers in stochastic dynamics of complex systems. Physica A: Statistical Mechanics and its Applications, 389(21), pp. 4958-4969. ISSN 03784371 [Article]

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Abstract or Description

The neuromagnetic activity (magnetoencephalogram, MEG) from healthy human brain and from an epileptic patient against chromatic flickering stimuli has been earlier analyzed on the basis of a memory functions formalism (MFF). Information measures of memory as well as relaxation parameters revealed high individuality and unique features in the neuromagnetic brain responses of each subject. The current paper demonstrates new capabilities of MFF by studying cross-correlations between MEG signals obtained from multiple and distant brain regions. It is shown that the MEG signals of healthy subjects are characterized by well-defined effects of frequency synchronization and at the same time by the domination of low-frequency processes. On the contrary, the MEG of a patient is characterized by a sharp abnormality of frequency synchronization, and also by prevalence of high-frequency quasi-periodic processes. Modification of synchronization effects and dynamics of cross-correlations offer a promising method of detecting pathological abnormalities in brain responses.

Item Type:

Article

Identification Number (DOI):

https://doi.org/10.1016/j.physa.2010.06.026

Departments, Centres and Research Units:

Psychology

Dates:

DateEvent
2010Published

Item ID:

4895

Date Deposited:

14 Feb 2011 12:38

Last Modified:

30 Jun 2017 13:22

Peer Reviewed:

Yes, this version has been peer-reviewed.

URI:

http://research.gold.ac.uk/id/eprint/4895

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