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Effect of time scales on the unfolding of neural attractors
R Pravitha1, P Indic, V P Nampoori
1International School of Photonics, Cochin University of Science and Technology, Cochin, India. pravitha@cusat.ac.in
Abstract:
A study of the effect of time scales in brain dynamics on the unfolding of the attractors in the phase space, reconstructed by a time delay embedding of the EEG signal, was carried out. Applying the techniques of nonlinear time series analysis, the unfolding rate of the system attractor was determined by analyzing the variation of the correlation dimension parameter and subjecting it to a bi-parametric fit. The behavior of the parameter, which measures the rate of unfolding, was monitored for varying time scales in two cases: (a) normal eyes closed condition and (b) the pathological case of epilepsy. Significant results were obtained.