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Nasotemporal ERP differences: evidence for increased inhibition of temporal distractors

Huber-Huber, C.; Grubert, A.; Ansorge, U.; Eimer, M.

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Authors

C. Huber-Huber

U. Ansorge

M. Eimer



Abstract

Previous research has demonstrated behavioral advantages for stimuli in the temporal relative to the nasal visual hemifield. To investigate whether this nasotemporal asymmetry reflects a genuinely attentional bias, we recorded event-related potentials in a task where participants identified a color-defined target digit in one visual hemifield that was accompanied by an irrelevant distractor in the opposite hemifield (experiment 1). To dissociate the processing of stimuli in nasal and temporal visual hemifields, an eye-patching procedure was used. Targets triggered N2pc components that marked their attentional selection. Unexpectedly, these N2pc components were larger and emerged earlier for nasal relative to temporal targets. Experiment 2 provided evidence that this nasotemporal asymmetry for the N2pc is linked to an increased attentional inhibition of temporal distractors. Relative to nasal distractors, temporal distractors elicited an increased inhibition-related contralateral positivity, resulting in more pronounced differences between contralateral and ipsilateral event-related potentials on trials with temporal distractors and nasal targets. These results provide novel evidence for a genuinely attentional contribution to nasotemporal asymmetries and suggest that such asymmetries are associated with top-down controlled distractor inhibition.

Citation

Huber-Huber, C., Grubert, A., Ansorge, U., & Eimer, M. (2015). Nasotemporal ERP differences: evidence for increased inhibition of temporal distractors. Journal of Neurophysiology, 113(7), 2210-2219. https://doi.org/10.1152/jn.00344.2014

Journal Article Type Article
Acceptance Date Jan 13, 2015
Online Publication Date Apr 1, 2015
Publication Date Apr 1, 2015
Deposit Date Jan 18, 2017
Publicly Available Date Mar 28, 2024
Journal Journal of Neurophysiology
Print ISSN 0022-3077
Electronic ISSN 1522-1598
Publisher American Physiological Society
Peer Reviewed Peer Reviewed
Volume 113
Issue 7
Pages 2210-2219
DOI https://doi.org/10.1152/jn.00344.2014

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