دانلود مقاله ISI انگلیسی شماره 37333
عنوان فارسی مقاله

چهره ها و احساسات: منابع مغزی میدان الکتریکی در طول پردازش عاطفی پنهان

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
37333 1998 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Faces and emotions: brain electric field sources during covert emotional processing
منبع

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

Journal : Neuropsychologia, Volume 36, Issue 4, April 1998, Pages 323–332

کلمات کلیدی
نقشه برداری مغز - پتانسیل های برانگیخته - حالت چهره - سمت - شخصیت - محلی سازی منابع
پیش نمایش مقاله
پیش نمایش مقاله چهره ها و احساسات: منابع مغزی میدان الکتریکی در طول پردازش عاطفی پنهان

چکیده انگلیسی

Covert brain activity related to task-free, spontaneous (i.e. unrequested), emotional evaluation of human face images was analysed in 27-channel averaged event-related potential (ERP) map series recorded from 18 healthy subjects while observing random sequences of face images without further instructions. After recording, subjects self-rated each face image on a scale from “liked” to “disliked”. These ratings were used to dichotomize the face images into the affective evaluation categories of “liked” and “disliked” for each subject and the subjects into the affective attitudes of “philanthropists” and “misanthropists” (depending on their mean rating across images). Event-related map series were averaged for “liked” and “disliked” face images and for “philanthropists” and “misanthropists”. The spatial configuration (landscape) of the electric field maps was assessed numerically by the electric gravity center, a conservative estimate of the mean location of all intracerebral, active, electric sources. Differences in electric gravity center location indicate activity of different neuronal populations. The electric gravity center locations of all event-related maps were averaged over the entire stimulus-on time (450 ms). The mean electric gravity center for disliked faces was located (significant across subjects) more to the right and somewhat more posterior than for liked faces. Similar differences were found between the mean electric gravity centers of misanthropists (more right and posterior) and philanthropists. Our neurophysiological findings are in line with neuropsychological findings, revealing visual emotional processing to depend on affective evaluation category and affective attitude, and extending the conclusions to a paradigm without directed task.

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