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Eye fixation–related potentials (EFRPs) during object identification

Published online by Cambridge University Press:  13 October 2010

PIA RÄMÄ  and
THIERRY BACCINO
PIA RÄMÄ*
Affiliation:
Department of Psychology, University of Nice-Sophia Antipolis, Nice, France
THIERRY BACCINO
Affiliation:
Department of Psychology, University of Nice-Sophia Antipolis, Nice, France
*
*Address correspondence and reprint requests to: Pia Rämä, Laboratoire Psychologie de la Perception (CNRS UMR 8158), Université Paris Descartes, 45, rue des Saints-Pères, 75006 Paris, France. E-mail: [email protected]
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Abstract

Eye fixation–related potential (EFRP) measures electrical brain activity in response to eye fixations. The aim of the current study was to investigate whether the EFRPs vary during consecutive eye fixations while subjects were performing an object identification task. Eye fixations evoked P1 and N1 components at the occipital and parietal recording sites. The latency of P1 component increased during consecutive fixations. The amplitude of P1 increased and the amplitude of N1 decreased during consecutive fixations. The results indicate that EFRPs are modulated during consecutive fixations, suggesting that the current technique may provide a useful tool to study temporal dynamics of visual perception and processes underlying object identification.

Keywords

EEGSaccadic eye-movementsVisual perceptionP1N1
Type
Brief Communication
Information
Visual Neuroscience , Volume 27 , Issue 5-6 , November 2010 , pp. 187 - 192
Copyright
Copyright © Cambridge University Press 2010

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