Brain Effective Connectivity Investigation With Directed Transform Function Method for Different Combination of Attention and Consciousness Based on EEG Signals

Rahimi, Masoumeh; Moradi, Mohammad Hasan; Ghassemi, Farnaz

doi:10.22041/ijbme.2017.60791.1203

Document Type : Full Research Paper

Authors

¹ Ms Student, Bioelectric Department, Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran

² Professor, Bioelectric Department, Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran

³ Assistant Professor, Bioelectric Department, Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran

https://doi.org/10.22041/ijbme.2017.60791.1203

Abstract

The aim of this paper is to study brain effective connectivity based on directed transform function (DTF) using granger causality method. This connectivity was calculated for recorded data in different states of attention and consciousness, forming four different classes: attention-consciousness, attention-unconsciousness, inattention-consciousness, and inattention-unconsciousness. Some common indices were extracted and calculated from the connectivity matrices. Indices of these four classes were compared to see whether there is a significant difference among them or not. The Multivariate Autoregressive (MVAR) model was used to obtain the linear causal relations between channels. Furthermore, signals were divided into four frequency bands for more accurate investigation, and the existence of significant difference was investigated with two-way repeated measures test. Results indicated that and among twelve indices could show a significant difference (p<0.05) in five states out of six possible states. The only state that no feature was able to show a meaningful difference was inattention-consciousness, and inattention-unconsciousness.

Keywords

Main Subjects

Biomedical Signal Processing / Medical Signal Processing / Biosignal Processing

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Iranian Journal of Biomedical Engineering

Brain Effective Connectivity Investigation With Directed Transform Function Method for Different Combination of Attention and Consciousness Based on EEG Signals

References

References

Volume 10, Issue 1
May 2016
Pages 59-68

Brain Effective Connectivity Investigation With Directed Transform Function Method for Different Combination of Attention and Consciousness Based on EEG Signals

References

References

Volume 10, Issue 1May 2016Pages 59-68

Volume 10, Issue 1
May 2016
Pages 59-68