دانلود مقاله ISI انگلیسی شماره 69523
عنوان فارسی مقاله

تعامل استرس حاد و مزمن باعث اختلال در کنترل رفتاری مبتنی بر مدل می شود

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
69523 2015 13 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
The interaction of acute and chronic stress impairs model-based behavioral control
منبع

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

Journal : Psychoneuroendocrinology, Volume 53, March 2015, Pages 268–280

کلمات کلیدی
استرس حاد / مزمن؛ کورتیزول؛ مدل سازی محاسباتی؛ یادگیری تقویتی؛تصمیم گیری مبتنی بر مدل/مستقل از مدل ؛ کنترل رفتاری
پیش نمایش مقاله
پیش نمایش مقاله تعامل استرس حاد و مزمن باعث اختلال در کنترل رفتاری مبتنی بر مدل می شود

چکیده انگلیسی

It is suggested that acute stress shifts behavioral control from goal-directed, model-based toward habitual, model-free strategies. Recent findings indicate that interindividual differences in the cortisol stress response influence model-based decision-making. Although not yet investigated in humans, animal studies show that chronic stress also shifts decision-making toward more habitual behavior. Here, we ask whether acute stress and individual vulnerability factors, such as stress reactivity and previous exposure to stressful life events, impact the balance between model-free and model-based control systems. To test this, 39 male participants (21–30 years old) were exposed to a potent psychosocial stressor (Trier Social Stress Test) and a control condition in a within-subjects design before they performed a sequential decision-making task which evaluates the balance between the two systems. Physiological and subjective stress reactivity was assessed before, during, and after acute stress exposure. By means of computational modeling, we demonstrate that interindividual variability in stress reactivity predicts impairments in model-based decision-making. Whereas acute psychosocial stress did not alter model-based behavioral control, we found chronic and acute stress to interact in their detrimental effect on decision-making: subjects with high but not low chronic stress levels as indicated by stressful life events exhibited reduced model-based control in response to acute psychosocial stress. These findings emphasize that stress reactivity and chronic stress play an important role in mediating the relationship between stress and decision-making. Our results might stimulate new insights into the interplay between chronic and acute stress, attenuated model-based control, and the pathogenesis of various psychiatric diseases.

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پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.