[Brief causal relations in EEG based on adaptive Granger causality]. / Untersuchung kurzzeitiger kausaler Beziehungen im EEG auf der Basis der adaptiven Granger Kausalität.
Biomed Tech (Berl)
; 47 Suppl 1 Pt 2: 510-3, 2002.
Article
em De
| MEDLINE
| ID: mdl-12465221
ABSTRACT
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Leitura
/
Atenção
/
Semântica
/
Córtex Cerebral
/
Percepção de Cores
/
Conflito Psicológico
/
Eletroencefalografia
Tipo de estudo:
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
De
Revista:
Biomed Tech (Berl)
Ano de publicação:
2002
Tipo de documento:
Article