|
|
Basic and Clinical Neuroscience، جلد ۸، شماره ۱، صفحات ۲۷-۳۶
|
|
|
| عنوان فارسی |
|
|
| چکیده فارسی مقاله |
|
|
| کلیدواژه‌های فارسی مقاله |
|
|
| عنوان انگلیسی |
Event-Related Potentials of Bottom-Up and Top-Down Processing of Emotional Faces |
|
| چکیده انگلیسی مقاله |
Introduction: Emotional stimulus is processed automatically in a bottom-up way or can be processed voluntarily in a top-down way. Imaging studies have indicated that bottom-up and top-down processing are mediated through different neural systems. However, temporal differentiation of top-down versus bottom-up processing of facial emotional expressions has remained to be clarified. The present study aimed to explore the time course of these processes as indexed by the emotion-specific P100 and late positive potential (LPP) event-related potential (ERP) components in a group of healthy women. Methods: Fourteen female students of Alzahra University, Tehran, Iran aged 18–30 years, voluntarily participated in the study. The subjects completed 2 overt and covert emotional tasks during ERP acquisition. Results: The results indicated that fearful expressions significantly produced greater P100 amplitude compared to other expressions. Moreover, the P100 findings showed an interaction between emotion and processing conditions. Further analysis indicated that within the overt condition, fearful expressions elicited more P100 amplitude compared to other emotional expressions. Also, overt conditions created significantly more LPP latencies and amplitudes compared to covert conditions. Conclusion: Based on the results, early perceptual processing of fearful face expressions is enhanced in top-down way compared to bottom-up way. It also suggests that P100 may reflect an attentional bias toward fearful emotions. However, no such differentiation was observed within later processing stages of face expressions, as indexed by the ERP LPP component, in a topdown versus bottom-up way. Overall, this study provides a basis for further exploring of bottomup and top-down processes underlying emotion and may be typically helpful for investigating the temporal characteristics associated with impaired emotional processing in psychiatric disorders. |
|
| کلیدواژه‌های انگلیسی مقاله |
|
|
| نویسندگان مقاله |
افسانه مرادی | afsane moradi
moradi.afsane@gmail.com
سید ابوالقاسم مهری نژاد | seyed abolghasem mehrinejad
university of alzahra, tehran
سازمان اصلی تایید شده: دانشگاه الزهرا (Alzahra university)
محمد قدیری | mohammad ghadiri
iran university of medical sciences, tehran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)
فرزین رضایی | farzin rezaei
kurdistan university of medical sciences, sanandaj
|
|
| نشانی اینترنتی |
http://bcn.iums.ac.ir/browse.php?a_code=A-10-871-1&slc_lang=en&sid=en |
| فایل مقاله |
دریافت فایل مقاله |
| کد مقاله (doi) |
|
| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
Cognitive Neuroscience |
| نوع مقاله منتشر شده |
Original |
|
|
|
برگشت به:
صفحه اول پایگاه |
نسخه مرتبط |
نشریه مرتبط |
فهرست نشریات
|