دانلود مقاله ISI انگلیسی شماره 60801
ترجمه فارسی عنوان مقاله

مدولاسیون توجه فضایی توسط محرک ترس شرطی شده: یک مطالعه fMRI مربوط به رویداد

عنوان انگلیسی
Modulation of spatial attention by fear-conditioned stimuli: an event-related fMRI study
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
60801 2002 10 صفحه PDF
منبع

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

Journal : Neuropsychologia, Volume 40, Issue 7, 2002, Pages 817–826

ترجمه کلمات کلیدی
آمیگدال؛ شرطی سازی ترس؛ تصویربرداری عصبی؛ فیزیولوژی اعصاب
کلمات کلیدی انگلیسی
Amygdala; Fear conditioning; Neuroimaging; Orbitofrontal cortex; Neurophysiology
پیش نمایش مقاله
پیش نمایش مقاله  مدولاسیون توجه فضایی توسط محرک ترس شرطی شده: یک مطالعه fMRI مربوط به رویداد

چکیده انگلیسی

Stimuli that signal threat can capture subjects’ attention, leading to more efficient detection of, and faster responses to, events occurring in that part of the environment. In the present study we explored the behavioural and anatomical correlates of the modulation of spatial attention by emotion using a fear conditioning paradigm, combined with a covert spatial orienting task. Reaction times for the detection of a peripheral target, which was preceded by brief (50 ms) presentations of the visual conditioned stimulus (CS+) in either the same or opposite visual field, showed an interaction between stimulus emotionality and attention shifts. We used event-related functional magnetic resonance imaging (fMRI) to characterise the associated neural responses. Consistent with previous studies, conditioning-induced enhanced responses were observed in the amygdala and extrastriate visual cortex. The modulation of spatial attention by a conditioned stimulus was associated with enhanced activity in regions of frontal and parietal cortices previously implicated in spatial attention, as well as in the lateral orbitofrontal cortex (lOFC).