کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4347033 1296816 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Changes in gamma- and theta-band phase synchronization patterns due to the difficulty of auditory oddball task
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Changes in gamma- and theta-band phase synchronization patterns due to the difficulty of auditory oddball task
چکیده انگلیسی

We analyze the pattern of inter-regional functional association between cortical activities during auditory oddball tasks, and the influence of task difficulty on it. Event-related electroencephalograms were recorded from 17 subjects during auditory oddball tasks with two task difficulty levels. The task difficulty was controlled by changing the difference between the frequencies of standard and target tones. The changes in behavioral response and P300 component due to the difficulty were consistent with previous findings, whereby successful control of difficulty was verified. Significant gamma- and theta-band phase synchronization (PS) was observed primarily between frontal and posterior electrodes along the midline, which is interpreted as functional connectivity among cortical regions devoted to the task execution. Apparent differences in PS were identified between two difficulties in both gamma- and theta-bands. On the whole, the number of electrode pairs showing significant PS was much smaller for higher task difficulty. The overall result is in agreement with our recent study which reported similar difference in PS due to the difficulty of ‘visual’ oddball task.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 468, Issue 2, 4 January 2010, Pages 156–160
نویسندگان
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