کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4333439 1292931 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interhemispheric imbalance during visuospatial attention investigated by unilateral and bilateral TMS over human parietal cortices
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Interhemispheric imbalance during visuospatial attention investigated by unilateral and bilateral TMS over human parietal cortices
چکیده انگلیسی

We used single-pulse transcranial magnetic stimulation (TMS) to study visuospatial attention. TMS was applied over one hemisphere, or simultaneously over both the right and left posterior parietal cortex (PPC), at two different interstimulus intervals (ISI) during a visual detection task. Unilateral TMS over the right and left PPC, respectively, impaired detection of contralateral presented visual stimuli at an ISI of 150 ms. By contrast, simultaneous biparietal TMS induced no significant changes in correct stimulus detection. TMS at an ISI of 250 ms evoked no changes for magnetic stimulation over either the right or the left parietal cortex. These results suggest that both PPC play a crucial role at a relatively early stage in the widely distributed brain network of visuospatial attention. The abolition of behavioral deficits during simultaneous biparietal TMS underlines the common hypothesis that an interhemispheric imbalance might underlie the disorders of neglect and extinction seen following unilateral brain damage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1072, Issue 1, 9 February 2006, Pages 194–199
نویسندگان
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