Human oscillatory activity associated to reward processing in a gambling task
Human oscillatory activity associated to reward processing in a gambling task
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DOI：
10.1016/j.neuropsychologia.2007.07.016
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发表时间：
2008-01-01
期刊：
影响因子：
2.6
通讯作者：
Rodriguez-Fornells, Antoni
中科院分区：
文献类型：
--
作者：
Marco-Pallares, Josep;Cucurell, David;Rodriguez-Fornells, Antoni
先前的事件相关脑电位（ERP）研究已经确定了一个内侧额叶负性（MFN）的负反馈或金钱损失的反应。与此相反，没有EEG相关已被确定有关的处理金钱收益或积极的反馈。考虑到大脑中有大量区域参与奖励的处理，这个结果令人困惑。在本研究中，我们使用了赌博的任务，以调查这个问题的审判，由审判基于小波的时频分析记录在健康人的脑电信号的非侵入性。使用这种分析，在β范围内的额中振荡分量被确定为与货币收益相关。此外，标准的时域ERP分析表明，在时间-频率分析中，与θ功率增加相关的损失的最惠国。我们提出，奖励相关的β振荡活动标志着功能耦合的分布在奖励处理的大脑区域。(C)2007爱思唯尔有限公司保留所有权利。
Previous event-related brain potential (ERP) studies have identified a medial frontal negativity (MFN) in response to negative feedback or monetary losses. In contrast, no EEG correlates have been identified related to the processing of monetary gains orpositive feedback. This result is puzzling considering the large number of brain regions involved in the processing of rewards. In the present study we used a gambling task to investigate this issue with trial-by-trial wavelet-based time-frequency analysis of the electroencephalographic signal recorded non-invasively in healthy humans. Using this analysis a mediofrontal oscillatory component in the beta range was identified which was associated to monetary gains. In addition, standard time-domain ERP analysis showed an MFN for losses that was associated with an increase in theta power in the time-frequency analysis. We propose that the reward-related beta oscillatory activity signifies the functional coupling of distributed brain regions involved in reward processing. (C) 2007 Elsevier Ltd. All rights reserved.