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Nasotemporal ERP differences: evidence for increased inhibition of temporal distractors
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Personen und Körperschaften: | , , , |
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Titel: |
Nasotemporal ERP differences: evidence for increased inhibition of temporal distractors |
In: | Journal of Neurophysiology, 113, 2015, 7, S. 2210-2219 |
veröffentlicht: |
American Physiological Society
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Umfang: | 2210-2219 |
ISSN: |
0022-3077 1522-1598 |
DOI: | 10.1152/jn.00344.2014 |
Zusammenfassung: | <jats:p> 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. </jats:p> |
Format: | E-Article |
Quelle: | American Physiological Society (CrossRef) |
Sprache: | Englisch |