A Comparison Study Of Synchronization Measures In Accessing The Neural

Dhivya, Selvakumaran (2013) A Comparison Study Of Synchronization Measures In Accessing The Neural. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Friston models the brain as a large number of interacting nonlinear dynamical systems. According to the model, the interactions between the subsystems can be linear as well as non linear. Nonlinear interactions between brain regions may reflect the unstable nature of the brain dynamics. This project is to study and compare several measures in analyzing the synchronization reflected in the electroencephalographic (EEG) signals. In particular, a derivation of EEG called auditory late response (ALR) which is related to attention will be used in the investigation. There are several types of synchronization measures that have been proposed in EEG processing. These methods can be categorized into linear and nonlinear methods. Among them are coherence, wavelet coherence, nonlinear interdependence and wavelet phase synchronization. It is unclear on the performance of each mentioned measures in examining the neural correlates of selective attention that reflected in auditory late response. By the end of the project, it is concluded the wavelet-phase stability is feasible to be used as objective evaluation compared to magnitude-squared coherence, wavelet coherence, wavelet-phase stability and non linear interdependence in the study of synchronization measures in accessing the neural correlates of selective attention using EEG.

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