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Titolo:
Magneto- and electroencephalographic correlates of the processing of visual verbal, and non-verbal information
Autore:
Eulitz, C; Eulitz, H; Elbert, T;
Indirizzi:
Univ Konstanz, Fachgrp Psychol, D-78434 Constance, Germany Univ Konstanz Constance Germany D-78434 chol, D-78434 Constance, Germany Zentrum Psychiat, Reichenau, Germany Zentrum Psychiat Reichenau GermanyZentrum Psychiat, Reichenau, Germany
Titolo Testata:
KLINISCHE NEUROPHYSIOLOGIE
fascicolo: 1, volume: 30, anno: 1999,
pagine: 44 - 53
SICI:
1434-0275(199903)30:1<44:MAECOT>2.0.ZU;2-P
Fonte:
ISI
Lingua:
GER
Soggetto:
LANGUAGE DOMINANCE; POTENTIALS; MEMORY;
Keywords:
magnetoencephalography; MEG; visual evoked magnetic fields electroencephalography; EEG; visual evoked potentials; language processing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Eulitz, C Univnyonstanz, Fachgrp Psychol, Postfach 5560-D25, D-78434 Constance, Germa Univ Konstanz Postfach 5560-D25 Constance Germany D-78434 Germa
Citazione:
C. Eulitz et al., "Magneto- and electroencephalographic correlates of the processing of visual verbal, and non-verbal information", KLIN NEUROP, 30(1), 1999, pp. 44-53

Abstract

A reliable method for he clinically useful assessment of brain structures involved in language processing would be highly desirable. Ideally, the outcome of the diagnostic procedure would show negligible dependence on the current cognitive state of a : patient. To approach this goal, we studied brain activational patterns during language processing on a rather basic revel, i.e. we examined secondary processing of lexical information when words were visually presented to the subject. This condition was compared to threeother experimental conditions requiring the secondary processing of non-lexical and non-verbal information in Visual stimuli. The primary task for subjects was target detection. Electric and magnetic brain activity differentiated the experimental conditions starting at about 150 ms after stimulus onset. Amplitudes of components of event-related potentials and fields, as well as the similarity of magnetic field distributions between experimental conditions (as evaluated by cross-correlation) differed significantly between mainly verbal and the non-verbal conditions. This reflects presumably that secondary processing of verbal and non-verbal information in visual stimuli involves different neuroanatomical structures. Attempts to reinforce this result with source analysis techniques failed to reveal systematic effects. Possible reasons might be the inadequacy of the applied distributed source analysis model as well as interindividual variability of neuroanatomical structures involved in the processing of information.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 10:13:26