دانلود مقاله ISI انگلیسی شماره 39656
ترجمه فارسی عنوان مقاله

عدم تقارن قشر وابسته به زمان ناشی از انگیختگی عاطفی: تجزیه و تحلیل EEG از هماهنگ سازی مربوط به رویداد در باندهای فرکانسی جداگانه تعریف شده

عنوان انگلیسی
Time-dependent cortical asymmetries induced by emotional arousal: EEG analysis of event-related synchronization and desynchronization in individually defined frequency bands
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
39656 2002 16 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : International Journal of Psychophysiology, Volume 44, Issue 1, April 2002, Pages 67–82

ترجمه کلمات کلیدی
هیجانی؛ انگیختگی عاطفی؛ تتا - آلفا؛ رویداد هماهنگ سازی - عدم تقارن نیمکره غربی - رسانایی پوست؛ ضربان قلب؛ گاه شماری عاطفی
کلمات کلیدی انگلیسی
EEG; Emotion; Emotional arousal; Theta; Alpha; Event-related desynchronization and synchronization; Hemispheric asymmetry; Skin conductance; Heart rate; Affective chronometry
پیش نمایش مقاله
پیش نمایش مقاله  عدم تقارن قشر وابسته به زمان ناشی از انگیختگی عاطفی: تجزیه و تحلیل EEG از هماهنگ سازی مربوط به رویداد در باندهای فرکانسی جداگانه تعریف شده

چکیده انگلیسی

Event-related desynchronization (ERD) and synchronization (ERS) in the individually defined theta, alpha-1, alpha-2 and alpha-3 frequency bands were measured in 20 healthy subjects in response to International Affective Picture System (IAPS) stimuli with low, moderate and high arousal (LA, MA and HA) content. The 62-channel EEG, skin conductance response (SCR) and heart rate (HR) were simultaneously recorded while subjects viewed sequentially presented pictures and subjectively rated them after each presentation. In the theta band, both MA and HA vs. LA stimuli induced larger synchronization over the left anterior and bilaterally over posterior cortical leads. However, rather unexpectedly, both MA and HA vs. LA stimuli yielded larger alpha-1 synchronization, predominantly over occipital leads. In both theta and alpha-1 bands, affectively salient stimuli prompted larger ERS against the background of the overall dominance in power synchronization of posterior regions of the right hemisphere, irrespective of stimulus category. Finally, in the alpha-3 band, HA stimuli induce a lateralized time-dependent power increase over anterior leads of the left hemisphere. The hemispheric asymmetries revealed point to recruitment of not only posterior regions of the right hemisphere (theta and alpha-1 bands), but also of anterior regions of the left hemisphere (theta and alpha-3 bands) in affect analysis beyond valence dimension. In terms of affective chronometry, the significant arousal×time interactions clearly indicate that in the theta frequency band discrimination of affective stimuli has already started at 200 ms post-stimulus, whereas in the alpha-1 and alpha-3 bands this process is delayed by up to 800–1200 ms.