KOPS - Das Institutionelle Repositorium der Universität Konstanz

A practical method for the measurements of the chaoticity of electric and magnetic brain activity

A practical method for the measurements of the chaoticity of electric and magnetic brain activity

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:de52d987607da88efb57593e337b0e13

KOWALIK, Zbigniew J., Thomas ELBERT, 1995. A practical method for the measurements of the chaoticity of electric and magnetic brain activity. In: International Journal of Bifurcation and Chaos. 5(2), pp. 475-490

@article{Kowalik1995pract-10176, title={A practical method for the measurements of the chaoticity of electric and magnetic brain activity}, year={1995}, doi={10.1142/S0218127495000375}, number={2}, volume={5}, journal={International Journal of Bifurcation and Chaos}, pages={475--490}, author={Kowalik, Zbigniew J. and Elbert, Thomas} }

Kowalik, Zbigniew J. eng First publ. in: International Journal of Bifurcation and Chaos 5 (1995), 2, pp. 475-490 Kowalik, Zbigniew J. 1995 application/pdf 2011-03-25T09:14:47Z The degree of complexity of the cortical processes related to different cognitive actions should logically produce an image in the electric and magnetic signals of the human brain. Hence, those measures of chaoticity will depend on the particular task being investigated. In many cases, the duration of a brain process does not allow for the generated signal to be treated as stationary. Therefore, the application of the standard method of nonlinear system theory is often questionable. The chaoticity of the process has to characterize the predictability of future state of the system. In the stationary case, such a quantity can be directly expressed by the largest Lyapunov exponent or by K-S entropy.<br />In this study, we performed a test for the applicability of the local Lyapunov exponent for the description of the chaoticity of the brain processes measured in EEG and MEG experiments. We demonstrate an algorithm for computation of chaoticity based on the local Lyapunov exponent and present possible applications of this method for specific cases with a diagnosis of schizophrenia or of tinnitus. We also show that chaoticity is able to detect critical transitions (phase-transition-like phenomena) which occur in the dynamics of neural mass activity at a specific point in time. A practical method for the measurements of the chaoticity of electric and magnetic brain activity Elbert, Thomas 2011-03-25T09:14:47Z deposit-license Elbert, Thomas

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

Elbert_1995_A_Practical.pdf 138

Das Dokument erscheint in:

deposit-license Solange nicht anders angezeigt, wird die Lizenz wie folgt beschrieben: deposit-license

KOPS Suche


Stöbern

Mein Benutzerkonto