کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4348915 1296912 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
P3a and P3b components associated to the neurocognitive evaluation of invalidly cued targets
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
P3a and P3b components associated to the neurocognitive evaluation of invalidly cued targets
چکیده انگلیسی

The present report focuses on evaluating the neurocognitive consequences of the correct or incorrect spatial prediction induced by a spatial cue. Positions in the vertical meridian were cued in order to evaluate the cognitive consequences in the processing of the validly (VC) or invalidly cued (IC) targets. The behavioural responses and the 64 EEG channel were recorded. The late endogenous event-related potential (ERP) induced by target stimuli in VC and IC targets were compared in voltage amplitude, voltage and current source density topographies. The P3a and a late positive complex, possibly P3b were increased in a statistically significant manner in the IC targets with regard to the VC targets. The previous result suggests that subjects prepare to accomplish the task upon specification of the cue, and when the IC target appeared it is treated as a low probability stimulus in a similar manner to deviant stimuli in odd-ball paradigms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 430, Issue 2, 10 January 2008, Pages 181–185
نویسندگان
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