UNTERSUCHUNG KURZZEITIGER KAUSALER BEZIEHUNGEN IM EEG AUF DER BASIS DER ADAPTIVEN GRANGER KAUSALITÄT

Autor:	Wolfram Hesse, Herbert Witte, Matthias Arnold, Eva Möller, Bärbel Schack
Rok vydání:	2002
Předmět:	Eeg data Granger causality medicine.diagnostic_test Computer science Causal relations Biomedical Engineering Econometrics medicine Coherence (signal processing) Predictability Electroencephalography Stroop effect
Zdroj:	Biomedizinische Technik/Biomedical Engineering. 47:510-513
ISSN:	1862-278X 0013-5585
DOI:	10.1515/bmte.2002.47.s1b.510
Popis:	Commonly, coherence and correlation are used to describe interrelations between EEG signals. But, on this basis, the investigation of causality or direction of interrelations is not possible. The general idea of causality between two signals may be expressed in terms of upgrading the predictability of one signal bye the knowledge of the past of the other signal. The best established approach in this context is the so-called Granger causality. The study present an adaptive estimation of Granger causality, which allows to detect dynamic causal relations within time intervals of less 100 ms. The time-variant Granger causality is applied to EEG data of the Stroop task. It could be shown, that conflict situation generates a dense web of directed interactions from posterior to anterior cortical areas.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eca0b8ec3a097a90f39cd1a284004146 https://doi.org/10.1515/bmte.2002.47.s1b.510 Zobrazit plný text záznamu