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首页> 外文期刊>Clinical EEG and neuroscience: official journal of the EEG and Clinical Neuroscience Society (ENCS) >Left Hemispheric Imbalance and Reward Mechanisms Affect Gambling Behavior: The Contribution of the Metacognition and Cortical Brain Oscillations
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Left Hemispheric Imbalance and Reward Mechanisms Affect Gambling Behavior: The Contribution of the Metacognition and Cortical Brain Oscillations

机译：左半球失衡和奖励机制影响赌博行为：元认知和大脑皮层振荡的贡献。

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摘要

The present research used the Iowa Gambling Task to test the effect of the reward-sensitivity Behavioral Activation System-Reward (BAS-Reward) construct on the ability to distinguish between high-and low-risk decisions. To elucidate the individual differences that influence the decisional processes, making the strategies more or less advantageous, we considered the impact of the BAS motivational system and the frontal left and right cortical activity on subjects' decisions. More specifically, the lateralization effect, which is related to the increased activation of the left (BAS-Reward-related) hemisphere, was explored by using frequency band analysis. Specifically, behavioral responses (gain/loss options), metacognition, and delta, theta, alpha, and beta band modulation (asymmetry index) were considered. Thirty subjects were divided into high-BAS and low-BAS groups. In comparison with low-BAS, the high-BAS group showed an increased tendency to opt in favor of the immediate reward (losing strategy) instead of the long-term option (winning strategy), and members of this group were more impaired in metacognitive monitoring of their strategies and showed an increased left hemisphere activation when they responded to losing choices. A "reward bias" effect was hypothesized to act for high BAS, based on a left-hemisphere hyperactivation.
机译：本研究使用爱荷华州赌博任务来测试奖励敏感性行为激活系统-奖励（BAS-奖励）构造对区分高风险和低风险决策的能力的影响。为了阐明影响决策过程的个体差异，使策略或多或少地具有优势，我们考虑了BAS动机系统以及额叶左右皮层活动对受试者决策的影响。更具体地，通过使用频带分析来探索与左半球（与BAS-Reward相关）的半球的激活增加有关的偏侧化作用。具体而言，考虑了行为反应（增益/损失选项），元认知和δ，θ，α和β波段调制（不对称指数）。 30名受试者被分为高BAS组和低BAS组。与低BAS相比，高BAS组显示出倾向于立即奖励（失败策略）而不是长期选择（获胜策略）的趋势，并且该组成员的元认知能力更弱监测他们的策略，并显示当他们对失去选择做出反应时左半球激活增加。据推测，基于左半球的过度激活，“奖励偏向”效应可对高BAS起作用。

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