کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3046528 1185044 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of attentional filtering demands on preparatory ERPs elicited in a spatial cueing task
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی عصب شناسی
پیش نمایش صفحه اول مقاله
Effects of attentional filtering demands on preparatory ERPs elicited in a spatial cueing task
چکیده انگلیسی

ObjectiveWe used ERP measures to investigate how attentional filtering requirements affect preparatory attentional control and spatially selective visual processing.MethodsIn a spatial cueing experiment, attentional filtering demands were manipulated by presenting task-relevant visual stimuli either in isolation (target-only task) or together with irrelevant adjacent distractors (target-plus-distractors task). ERPs were recorded in response to informative spatial precues, and in response to subsequent visual stimuli at attended and unattended locations.ResultsThe preparatory ADAN component elicited during the cue-target interval was larger and more sustained in the target-plus-distractors task, reflecting the demand of stronger attentional filtering. By contrast, two other preparatory lateralised components (EDAN and LDAP) were unaffected by the attentional filtering demand. Similar enhancements of P1 and N1 components in response to the lateral imperative visual stimuli were observed at cued versus uncued locations, regardless of filtering demand, whereas later attentional-related negativities beyond 200 ms post-stimulus were larger the target-plus-distractor task.ConclusionsOur results implicate that the ADAN component is linked to preparatory top-down control processes involved in the attentional filtering of irrelevant distractors; such filtering also affects later attention-related negativities recorded after the onset of the imperative stimulus.SignificanceERPs can reveal effects of expected attentional filtering of irrelevant distractors on preparatory attentional control processes and spatially selective visual processing.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Clinical Neurophysiology - Volume 120, Issue 6, June 2009, Pages 1087–1095
نویسندگان
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