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Titolo:
Slow cortical potentials during retention of object, spatial, and verbal information
Autore:
Bosch, V; Mecklinger, A; Friederici, AD;
Indirizzi:
Max Planck Inst Cognit Neurosci, D-04303 Leipzig, Germany Max Planck Inst Cognit Neurosci Leipzig Germany D-04303 Leipzig, Germany
Titolo Testata:
COGNITIVE BRAIN RESEARCH
fascicolo: 3, volume: 10, anno: 2001,
pagine: 219 - 237
SICI:
0926-6410(200101)10:3<219:SCPDRO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; LONG-TERM-MEMORY; WORKING-MEMORY; PREFRONTAL CORTEX; ACTIVATION PATTERNS; RECOGNITION MEMORY; NEURAL SYSTEMS; BRAIN; ARCHITECTURE; DISSOCIATION;
Keywords:
working memory; event-related potential; slow cortical potential;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Bosch, V Max Planck Inst Cognit Neurosci, POB 500 355, D-04303 Leipzig, Germany Max Planck Inst Cognit Neurosci POB 500 355 Leipzig Germany D-04303
Citazione:
V. Bosch et al., "Slow cortical potentials during retention of object, spatial, and verbal information", COGN BRAIN, 10(3), 2001, pp. 219-237

Abstract

We used event related potentials (ERPs) to examine both the specificity and the timing of slow cortical scalp potentials (SPs) elicited by the retention of object. spatial, and verbal information in working memory (WM). Participants performed a modified delayed matching task in which a task cue presented in the middle of the delay interval indicated what type of information had to be retained for a subsequent comparison with the test stimulus. The first experiment used nameable objects and spatial locations as stimuli. The retrieval mode (visual vs. verbal) was manipulated by presenting either figural information or printed words as test stimuli. Transient ensemblesof frontal and parieto-occipital slow waves with different scalp topographies for object and spatial information were evoked as a function of task cues. When words rather than objects were used as test stimuli highly similar, though more pronounced, fronto-parietal slow wave patterns were obtained. The second experiment using unfamiliar objects and non-nameable spatial locations indicated that neither the left frontal negative SP nor the: posterior SPs are exclusively related to verbal working memory operations. The results indicate that a parietal negative SP reflects processes of spatial selective attention whereas a parieto-occipital positive SP indexes the retention of visual object information. Left frontal negative SPs are generated by a compound of higher order frontal control processes and vary as a function of information type. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 03:59:37