کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4344523 1296664 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anodal tDCS of dorsolateral prefontal cortex during an Implicit Association Test
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Anodal tDCS of dorsolateral prefontal cortex during an Implicit Association Test
چکیده انگلیسی

Anodal stimulation of dorsolateral prefrontal cortex by transcranial Direct Current Stimulation (tDCS) has been shown to enhance performance on working memory tasks. However, it is not yet known precisely which aspects of working memory – a broad theoretical concept including short-term memory and various executive functions – are involved in such effects. In the current study, we aimed to determine whether tDCS would reduce bias effects on an Implicit Association Test, in which subjects must respond either congruently or incongruently to pre-existing evaluative associations. Such biases reflect a conflict between automatic associations and executive function, and tDCS was hypothesized to cause a shift in this balance in favor of executive function. The results clearly contradicted this hypothesis: tDCS did improve reaction times, but in the congruent rather than incongruent mapping condition. We conclude that DLPFC tDCS does not directly improve the ability to overcome bias; previous findings concerning working memory enhancement appear to reflect effects on a different component of executive function.


► DLPFC is activated in the incongruent condition of the Implicit Association Test.
► Interference with DLPFC using TMS is strongest in the incongruent condition.
► Subjects performed an IAT after excitatory DLPFC stimulation with anodal tDCS.
► TDCS significantly improved reaction times, but only in the congruent condition.
► TDCS may activate both task-relevant and long-term WM-related associations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 517, Issue 2, 31 May 2012, Pages 82–86
نویسندگان
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