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Titolo:
Sequential information processing during a mental arithmetic is reflected in the time course of event-related brain potentials
Autore:
Iguchi, Y; Hashimoto, I;
Indirizzi:
Tokyo Metropolitan Org Med Res, Tokyo Inst Psychiat, Dept Psychophysiol, Setagaya Ku, Tokyo 1568585, Japan Tokyo Metropolitan Org Med Res Tokyo Japan 1568585 Tokyo 1568585, Japan Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi, Japan Natl Inst Physiol Sci Okazaki Aichi Japan Physiol, Okazaki, Aichi, Japan
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 2, volume: 111, anno: 2000,
pagine: 204 - 213
SICI:
1388-2457(200002)111:2<204:SIPDAM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; FUNCTIONAL CATEGORIZATION; SELECTIVE ATTENTION; FRONTAL LOBES; SLOW WAVES; MEMORY; LOCALIZATION; TASK; COMPONENTS;
Keywords:
mental arithmetic; visual digit presentation; adding task; event-related brain potentials; a positive slow potential; sequential information processing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Hashimoto, I Tokyo Metropolitan Org Med Res, Tokyo Inst Psychiat, Dept Psychophysiol, Setagaya Ku, 2-1-8 Kamikitazawa, Tokyo 1568585, Japan Tokyo Metropolitan Org Med Res 2-1-8 Kamikitazawa Tokyo Japan 1568585
Citazione:
Y. Iguchi e I. Hashimoto, "Sequential information processing during a mental arithmetic is reflected in the time course of event-related brain potentials", CLIN NEU, 111(2), 2000, pp. 204-213

Abstract

Objective: We hypothesized that mental arithmetic is a complex of sequential information processing. Tn order to test the hypothesis, event-related potentials (ERPs) were measured during 3 mental tasks. Methods: Fifteen normal human subjects performed the following tasks, (1) subjects added up every digit delivered successively on a computer display,(2) subjects counted the number of presented digits, or (3) subjects counted the number of meaningless patterns. Spatiotemporal differences between ERP waveforms under the 3 tasks were studied within the period of 1200 ms post-stimulus. Results: During the adding task, N120-P180-N220 complex advanced in latency in the left frontal, central and parietal regions. P300 increased in amplitude in the frontal and temporal regions during adding and counting digits, which was specific to the digit presentation. A positive slow potential depended on the adding task and showed two spatiotemporal distributions; onewas a widespread brain activity over the frontal, central, temporal and parietal regions observed within 400-820 ms, and another was a brain activityrestricted to the frontal region lasting up to 1150 ms. Conclusions: The results suggest that the early portion of ERPs reflects identification of physical attributes of stimuli and numeric meaning of digits, and that the positive slow potential reflects processes associated withcalculation. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 31/10/20 alle ore 20:57:11