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Presaccadic Brain Potentials in Conditions of Covert Attention Orienting

Published online by Cambridge University Press:  10 April 2014

Maria Slavutskaya  and
Valerii V. Shulgovskii
Maria Slavutskaya*
Affiliation:
Laboratory of Comparative Physiology of Higher Nervous Activity
Valerii V. Shulgovskii*
Affiliation:
Department of Higher Nervous Activity Moscow, State University
*
Correspondence concerning this article should be addressed to Maria Slavutskaya., Faculty of Biology, Moscow State University, GSP-2, Leninskye gory d.1, str. 12, Moscow - 119992 Russia. E-mail: [email protected]
Valerii V. Shulgovskii, Faculty of Biology MGU, Dpt. Higher Nervous Activity, Phone: +7(495)939-2837, FAX: +7(495)939-2837 Emails: [email protected] and [email protected]
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Abstract

Twelve healthy subjects underwent investigation of averaged (electroencephalogram) EEG potentials during preparation for motor activity and in the latent period (LP) of visually evoked saccades by presentation of stimuli using Posner's (1980) design of “cost-benefit.” It has been shown that covert spatial attention orientation leads to an increase in amplitude and decrease in latency of presaccadic initiation potential peaks within the saccadic latent period (LP) (P-100, N –50). Processes of covert orientation of attention during the interstimulus interval period of anticipation of the target stimulus correlate with the increase of slow negativity of fronto-parietal-temporal localization. Spatial-temporal changes of presaccadic potentials are evidence of the fact that orientation of attention during motor preparation and saccadic initiation is reflected in intensification of fronto-parietal networks of saccadic control and attention, activating the fronto-medio-thalamic and thalamo-parietal modulating systems.

Se examinaron los potenciales EEG promediados de doce sujetos sanos durante su preparación para actividad motor y en el período latente de sacádicos evocados visualmente por la presentación de estímulos según el diseño de “coste-beneficio” de Posner (1980). Se ha mostrado que la orientación de la atención espacial encubierto lleva a un incremento en la amplitud y un decremento en la latencia de los picos potenciales de iniciación presacádica dentro del período sacádico latente (P-100, N -50). Los procesos encubiertos de orientación de la atención durante el período del intervalo inter-estímulo de anticipación del estímulo meta correlacionan con el incremento de la negatividad lenta de localización fronto-parietal. Cambios espacio-temporales de potenciales presacádicos son evidencia del hecho de que la orientación de la atención durante la preparación motora y la iniciación sacádica se refleja en la intensificación de las redes fronto-parietales de control y atención, activando los sistemas de modulación fronto-medio-talámicos y tálamo-parietales.

Keywords

orienting of attentionsaccadeslatent periodpresaccadic potentialsorientación de la atenciónmovimientos sacádicosperiodo latentepotenciales presacádicos
Type
Articles
Information
The Spanish Journal of Psychology , Volume 10 , Issue 2 , November 2007 , pp. 277 - 284
Copyright
Copyright © Cambridge University Press 2007

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