A POPULATION SEARCH ALGORITHM FOR CLUSTERED MULTIVARIATE SOLUTIONS: APPLICATION TO EEG CONNECTIVITY

Ian Daly Reinhold Scherer

Keywords

Population search, Connectivity, Electroencephalogram(EEG), Phase locking values (PLV)

Abstract

There is a need to efficiently identify time, frequency and spatial locations between which connectivity occurs within the brain. Therefore, a novel, population based, search al- gorithm is proposed based upon the behaviour of foraging animals. The method is evaluated on a simple grid search prob- lem and on the identification of time-frequency locations of statistically significant phase synchronisation in both syn- thetic and real EEG. The method is shown to be compara- ble to a state-of-the-art phase synchronisation identification algorithm in terms of speed while identifying a large pro- portion of available solutions.

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