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Titolo:
Intracranial ERPs in humans during a lateralized visual oddball task: II. Temporal, parietal, and frontal recordings
Autore:
Clarke, JM; Halgren, E; Chauvel, P;
Indirizzi:
INSERM E 9926, Lab Neurophysiol & Neuropsychol, Marseille, France INSERM E9926 Marseille France hysiol & Neuropsychol, Marseille, France CUNY Brooklyn Coll, Dept Psychol, Brooklyn, NY 11210 USA CUNY Brooklyn Coll Brooklyn NY USA 11210 Psychol, Brooklyn, NY 11210 USA Dept Radiol, Salt Lake City, UT 84108 USA Dept Radiol Salt Lake City UT USA 84108 iol, Salt Lake City, UT 84108 USA
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 7, volume: 110, anno: 1999,
pagine: 1226 - 1244
SICI:
1388-2457(199907)110:7<1226:IEIHDA>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; INTRACEREBRAL POTENTIALS; RECOGNITION MEMORY; BRAIN POTENTIALS; RARE TARGET; SELECTIVE ATTENTION; CORTICAL AFFERENTS; SCALP TOPOGRAPHY; CORTEX; LOBE;
Keywords:
intracranial event-related potentials; laterality; P3; prefrontal cortex; medial temporal lobe;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Halgren, E INSERM E 9926, Lab Neurophysiol & Neuropsychol, Marseille, France INSERM E 9926 Marseille France uropsychol, Marseille, France
Citazione:
J.M. Clarke et al., "Intracranial ERPs in humans during a lateralized visual oddball task: II. Temporal, parietal, and frontal recordings", CLIN NEU, 110(7), 1999, pp. 1226-1244

Abstract

Objective: We investigated the relative participation of each cerebral hemisphere during a lateralized task that can be performed by a single hemisphere. While our companion article ( Clarke et al. 1999) focused on visual and motor event-related potentials (ERPs) recorded from occipital and peri-Rolandic sites, the present article is concerned with ERP correlates of intermediate stages of information processing from remaining cerebral regions. Methods: Intracranial ERPs were recorded from temporal, parietal and frontal lobe sites in 13 patients with intractable epilepsy while they performeda lateralized visual oddball task. Results: Visually-responsive N2 and/or P3 effects were recorded from medial temporal and supramarginal sites that appear to reflect activity along ventral and dorsal visual streams, respectively. Likewise, certain prefrontalsites, that are probably involved in working memory, were also visually-responsive. The majority of sites exhibiting N2., P3 and/or slow wave components, however, were unaffected by lateralized visual field or response hand effects. Target-evoked P3-like components were most frequently recorded from medial temporal and prefrontal sites. Post-response slow wave components were pervasive, and polarity reversals were present in the insula/operculumregion, apparently reflecting somatosensory activity from SII. Conclusions: The general absence of lateralized ERP effects despite lateralized stimulus input and response output suggests the importance of interhemispheric integration over hemispheric independence in the processing of this type of task. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 11:42:53