title: Changes in predictive cuing modulate the hemispheric distribution of the P1 inhibitory response to attentional targets.
abstract: Brain activity related to orienting of attention with spatial cues and brain responses to attentional targets are influenced the probabilistic contingency between cues and targets. Compared to predictive cues, cues predicting at chance the location of targets reduce the filtering out of uncued locations and the costs in reorienting attention to targets presented at these locations. Slagter et al. (2016) have recently suggested that the larger target related P1 component that is found in the hemisphere ipsilateral to validly cued targets reflects stimulus-driven inhibition in the processing of the unstimulated side of space contralateral to the same hemisphere. Here we verified whether the strength of this inhibition and the amplitude of the corresponding P1 wave are modulated by the probabilistic link between cues and targets. Healthy participants performed a task of endogenous orienting once with predictive and once with non-predictive directional cues. In the non-predictive condition we observed a drop in the amplitude of the P1 ipsilateral to the target and in the costs of reorienting. No change in the inter-hemispheric latencies of the P1 was found between the two predictive conditions. The N1 facilitatory component was unaffected by predictive cuing. These results show that the predictive context modulates the strength of the inhibitory P1 response and that this modulation is not matched with changes in the inter-hemispheric interaction between the P1 generators of the two hemispheres.
authors.affiliation: Dipartimento di Psicologia, Università "La Sapienza", Roma, Italy; Fondazione Santa Lucia, IRCCS, Roma, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Lasaponara
authors.affiliation: Dipartimento di Psicologia, Università "La Sapienza", Roma, Italy; Fondazione Santa Lucia, IRCCS, Roma, Italy.
authors.forename: Marianna
authors.initials: M
authors.lastname: D' Onofrio
authors.affiliation: Dipartimento di Psicologia, Università "La Sapienza", Roma, Italy; Fondazione Santa Lucia, IRCCS, Roma, Italy.
authors.forename: Alessio
authors.initials: A
authors.lastname: Dragone
authors.affiliation: Dipartimento di Psicologia, Università "La Sapienza", Roma, Italy; Fondazione Santa Lucia, IRCCS, Roma, Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: Pinto
authors.affiliation: Dipartimento di Psicologia, Università "La Sapienza", Roma, Italy; Fondazione Santa Lucia, IRCCS, Roma, Italy.
authors.forename: Ludovica
authors.initials: L
authors.lastname: Caratelli
authors.affiliation: Dipartimento di Psicologia, Università "La Sapienza", Roma, Italy; Fondazione Santa Lucia, IRCCS, Roma, Italy. Electronic address: fabrizio.doricchi@uniroma1.it.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Doricchi
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D003463:Cues; D004292:Dominance, Cerebral; D004569:Electroencephalography; D004585:Electrooculography; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D009949:Orientation / Q000502:physiology; D011930:Reaction Time; D013028:Space Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology
keywords: EEG; ERPs; Neglect; P1/N1; Predictive cueing