title: Total and partial coherence analysis of spontaneous and evoked EEG by means of multi-variable autoregressive processing.
abstract: The joint use of total and partial coherence between pairs of EEGs simultaneously recorded in a standard set, is shown to enhance what is caused by direct correlation between cortical subsystems and what is instead related to the spread of the electromagnetic field. A multi-variable autoregressive approach is employed in the computation, giving results even for a very short time window, thus allowing coherence to be investigated at the main cortical latencies of evoked potentials. In particular, when a combined visual and somatosensory stimulation is applied, cortical interactions are captured in the frequency domain.
authors.affiliation: Dipartimento di Elettronica e Informazione, Politecnico di Milano, Italy. liberati@elet.polimi.it
authors.forename: D
authors.initials: D
authors.lastname: Liberati
authors.forename: M
authors.initials: M
authors.lastname: Cursi
authors.forename: T
authors.initials: T
authors.lastname: Locatelli
authors.forename: G
authors.initials: G
authors.lastname: Comi
authors.forename: S
authors.initials: S
authors.lastname: Cerutti
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D001330:Electronic Data Processing; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans