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Titolo:
Alpha activity as an index of cortical inhibition during sustained internally controlled attention in infants
Autore:
Orekhova, EV; Stroganova, TA; Posikera, IN;
Indirizzi:
Russian Acad Sci, Brain Res Inst, Moscow 103064, Russia Russian Acad Sci Moscow Russia 103064 in Res Inst, Moscow 103064, Russia Russian Acad Educ, Inst Psychol, Moscow 103009, Russia Russian Acad Educ Moscow Russia 103009 st Psychol, Moscow 103009, Russia
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 5, volume: 112, anno: 2001,
pagine: 740 - 749
SICI:
1388-2457(200105)112:5<740:AAAAIO>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
EEG; SYNCHRONIZATION; PARIETAL; LOCALIZATION; ACTIVATION; CORTEX; LOBES; PET;
Keywords:
sustained attention; inhibition; EEG; infants; alpha rhythm; sensorimotor rhythm;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Stroganova, TA Russian Acad Sci, Brain Res Inst, Per Obukha 5, Moscow 103064, Russia Russian Acad Sci Per Obukha 5 Moscow Russia 103064 Russia
Citazione:
E.V. Orekhova et al., "Alpha activity as an index of cortical inhibition during sustained internally controlled attention in infants", CLIN NEU, 112(5), 2001, pp. 740-749

Abstract

Objectives: The study examined the suggestion that infant ability to maintain attention in anticipatory task and to sustain interference is related to the active inhibitory processes in cortical neural networks. Methods: The extent of selective EEG synchronization in the alpha range has been taken as a measure of cortical inhibition. EEG was registered in 60 infants aged 8-11 months during: (1) attention to an object in the visual field (externally controlled attention); (2) anticipation of the person in the peek-a-boo game (internally controlled attention). Results: The infants who demonstrated longer periods of anticipatory attention had higher absolute spectral amplitude in the broad frequency range under both experimental conditions. It was suggested that the effect of 'overall' EEG synchronization is related to some stable individual differences in psychophysiological traits. To control for the effect of overall EEG synchronization the relation between relative alpha amplitudes in 6.4-10 Hz range and the duration of internally controlled attention was analyzed. The infants with longer compared to shorter anticipatory attention spans had relatively higher 6.8 Hz alpha synchronization at posterior parietal sites under this experimental condition. Conclusions. It was suggested that alpha synchronization over posterior parietal cortex reflects an active inhibition of certain parietal networks involved in maintaining attention to peripheral Visual field rather than merely an 'idle' state of this cortical area. Such an inhibition appears to allow infants to avoid interference of concurrent visual stimulation at the periphery of the visual field. (C) 2001 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 28/01/20 alle ore 15:25:07