Phase Synchrony Applied to EEG

摘要

In this paper, a pbase synchrony concept has been, applied to an EEG (Electroencephalogram). Phase synchrony is a frequency specific quantity which is specified for two oscillators. Phase synchrony is applied to the generated pairs of signals, by extracting the frequency specific instantaneous phase sequences. This is accomplished by generating the analytic sequence corresponding to the given signal and then extracting the frequency specific content for the frequency band (or EEG rhythm) of interest This can be attained by Instantaneous Phase Processor (IPP).The advantage of IPP over wavelet filtering is better parameter flexibility as analysis time ,the centre frequency and bandwidth of processor can be adjusted independently. A Phase Synchrony Processor (PSP) is proposed and the influence of its parameters on the reliability of phase synchrony estimates is explored on the basis of known signals. Application of phase synchrony processing to EEG suggests that it is possible to distinguish between children with and without attention deficit disorder on the basis of phase synchrony computed from the EEG recorded while performing attention intensive tasks.