Differential Frontal Cortex Activation Before Anticipatory and Reactive Saccades in Infants

Authors


Centre for Brain and Cognitive Development, School of Psychology, Birkbeck College, Malet Street, London WC1E7HX, United Kingdom. E-mail: g.csibra@bbk.ac.uk

Abstract

Neural correlates of anticipatory and reactive saccades were studied in 4-month-old infants by recording high-density event-related potentials. Infants were presented with a fixed sequence of stimulus presentation to which they rapidly showed anticipatory saccades, as well as continuing with some reactive (stimulus-driven) saccades. As in a previous study, no clear evidence was found for adultlike, saccade-related potentials, although some presaccadic differences between reactive and anticipatory saccades were observed. Infants also showed different stimulus offset-related effects preceding the 2 types of trials with a right-frontal positivity when an anticipatory look follows, but only left-frontal positivity when a reactive saccade follows.

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