Oscillatory Event Synchrony During Steady State Visual Evoked Potentials

In this paper we study the dynamics of distributed neuronal assemblies, through the event synchrony of EEG oscillatory bursts. We recorded EEG signals before, during and after steady-state visual evoked potentials (SSVEP) in medium (16 Hz) and high frequency (32 Hz) ranges. The time-frequency oscillatory events are extracted using bump modeling. Thereafter, the recently introduced stochastic event synchrony (SES) method is applied to compare these patterns between brain areas. Significant effects are shown, demonstrating that not only the background activity is affected by flickering stimulation, but also oscillatory patterns.

[1]  Rémi Gervais,et al.  A machine learning approach to the analysis of time-frequency maps, and its application to neural dynamics , 2007, Neural Networks.

[2]  E. Thompson,et al.  The Cambridge Handbook of Consciousness , 2007 .

[3]  M. Browne,et al.  Low-probability event-detection and separation via statistical wavelet thresholding: an application to psychophysiological denoising , 2002, Clinical Neurophysiology.

[4]  Todd C. Handy,et al.  Event-related potentials : a methods handbook , 2005 .

[5]  J. Pernier,et al.  Stimulus Specificity of Phase-Locked and Non-Phase-Locked 40 Hz Visual Responses in Human , 1996, The Journal of Neuroscience.

[6]  J. Martinerie,et al.  The brainweb: Phase synchronization and large-scale integration , 2001, Nature Reviews Neuroscience.

[7]  Willy Wong,et al.  Optimal Window Length in the Windowed Adaptive Chirplet Analysis of Visual Evoked Potentials , 2006, 2006 International Conference of the IEEE Engineering in Medicine and Biology Society.

[8]  Willy Wong,et al.  The adaptive chirplet transform and visual evoked potentials , 2006, IEEE Transactions on Biomedical Engineering.

[9]  N. Crone,et al.  Attention to a painful cutaneous laser stimulus modulates electrocorticographic event-related desynchronization in humans , 2004, Clinical Neurophysiology.

[10]  D. Regan.  Human brain electrophysiology: Evoked potentials and evoked magnetic fields in science and medicine , 1989 .

[11]  Andrzej Cichocki,et al.  A Novel Measure for Synchrony and its Application to Neural Signals , 2007, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07.

[12]  Maren Grigutsch,et al.  EEG oscillations and wavelet analysis , 2005 .

[13]  Jean-Philippe Lachaux,et al.  The Cambridge Handbook of Consciousness: Neurodynamical Approaches to Consciousness , 2007 .