Marco-Pallarés Josep, Münte Thomas F, Rodríguez-Fornells Antoni
Department of Basic Psychology, University of Barcelona, 08035 Barcelona, Spain; Cognition and Brain Plasticity Unit, Bellvitge Research Biomedical Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain.
Department of Neurology, University of Lübeck, Lübeck, Germany; Institute of Psychology II, University of Lübeck, Lübeck, Germany.
Neurosci Biobehav Rev. 2015 Feb;49:1-7. doi: 10.1016/j.neubiorev.2014.11.014. Epub 2014 Nov 25.
Oscillatory activity has been proposed as a key mechanism in the integration of brain activity of distant structures. Particularly, high frequency brain oscillatory activity in the beta and gamma range has received increasing interest in the domains of attention and memory. In addition, a number of recent studies have revealed an increase of beta-gamma activity (20-35 Hz) after unexpected or relevant positive reward outcomes. In the present manuscript we review the literature on this phenomenon and we propose that this activity is a brain signature elicited by unexpected positive outcomes in order to transmit a fast motivational value signal to the reward network. In addition, we hypothesize that beta-gamma oscillatory activity indexes the interaction between attentional and emotional systems, and that it directly reflects the appearance of unexpected positive rewards in learning-related contexts.
振荡活动被认为是远距离结构大脑活动整合的关键机制。特别是，β和γ频段的高频脑振荡活动在注意力和记忆领域受到了越来越多的关注。此外，最近的一些研究表明，在意外或相关的积极奖励结果出现后，β-γ活动（20-35赫兹）会增加。在本手稿中，我们回顾了关于这一现象的文献，并提出这种活动是由意外的积极结果引发的大脑信号，以便向奖励网络传递快速的动机价值信号。此外，我们假设β-γ振荡活动反映了注意力和情感系统之间的相互作用，并且它直接反映了在学习相关情境中意外积极奖励的出现。
