On detecting determinism and nonlinearity in microelectrode recording signals: Approach based on non-stationary surrogate data methods

摘要

Two new surrogate methods, the Small Shuffle Surrogate (SSS) and theTruncated Fourier Transform Surrogate (TFTS), have been proposed to studywhether there are some kind of dynamics in irregular fluctuations and if sowhether these dynamics are linear or not, even if this fluctuations aremodulated by long term trends. This situation is theoretically incompatiblewith the assumption underlying previously proposed surrogate methods. We applythe SSS and TFTS methods to microelectrode recording (MER) signals fromdifferent brain areas, in order to acquire a deeper understanding of them.Through our methodology we conclude that the irregular fluctuations in MERsignals possess some determinism.