کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4326033 1614056 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Neural processing of reward magnitude under varying attentional demands
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Neural processing of reward magnitude under varying attentional demands
چکیده انگلیسی

Central to the organization of behavior is the ability to represent the magnitude of a prospective reward and the costs related to obtaining it. Therein, reward-related neural activations are discounted in dependence of the effort required to resolve a given task. Varying attentional demands of the task might however affect reward-related neural activations. Here we employed fMRI to investigate the neural representation of expected values during a monetary incentive delay task with varying attentional demands. Following a cue, indicating at the same time the difficulty (hard/easy) and the reward magnitude (high/low) of the upcoming trial, subjects performed an attention task and subsequently received feedback about their monetary reward. Consistent with previous results, activity in anterior-cingulate, insular/orbitofrontal and mesolimbic regions co-varied with the anticipated reward-magnitude, but also with the attentional requirements of the task. These activations occurred contingent on action-execution and resembled the response time pattern of the subjects. In contrast, cue-related activations, signaling the forthcoming task-requirements, were only observed within attentional control structures. These results suggest that anticipated reward-magnitude and task-related attentional demands are concurrently processed in partially overlapping neural networks of anterior-cingulate, insular/orbitofrontal, and mesolimbic regions.

Research highlights
► Overlapping neural networks for reward-magnitude and task-related cognitive demands
► Reward-predictive activity co-varied with reward-magnitude and cognitive difficulty.
► Activity to cues in SPL/FEF was modulated by difficulty but not by reward-magnitude

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1383, 6 April 2011, Pages 218–229
نویسندگان
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