与学习任务中的金钱收益和损失信号相关的脑电图振荡活动：注意冲动和学习能力的影响。,International Journal of Psychophysiology

当前位置： X-MOL 学术 › Int. J. Psychophysiol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

与学习任务中的金钱收益和损失信号相关的脑电图振荡活动：注意冲动和学习能力的影响。
International Journal of Psychophysiology ( IF 2.5 ) Pub Date : 2011-06-28 , DOI: 10.1016/j.ijpsycho.2011.06.005
Vilfredo De Pascalis ₁ , Vincenzo Varriale , Marco Rotonda

Affiliation

这项研究调查了健康女性在工具学习任务中注意冲动（Att-Imp），学习能力和学习实践中的个体差异对振荡活动和相位同步反应对金钱损益信号的影响。我们对脑电图（EEG）信号进行了基于小波试验的时频分析，以提供来自theta的30个电极（4-8 Hz，350-500 ms），α的幅度和部位间相位同步测量（8-12 Hz，100-200 ms），beta（13-25 Hz，100-200 ms）和gamma（30-40 Hz，350-450 ms）时频范围。与θ，β和γ频段的增益信号相比，跟随损耗信号的振荡幅度和站点间相位同步性都更大。与高Att-Imp受试者相比，低Att-Imp受试者在额叶中央和向心部位的350-500 ms时间窗内具有更高的theta活性。在高Att-Imp个体中，货币增益信号引起较高的θ和γ活性，而在低Att-Imp个体中，损失信号引起较高的损失信号活性。优秀的学习者显示，与获得信号相比，额前额叶和额枕位之间的半球内θ同步性增强，金钱损失。在优秀的学习者中，金钱损失导致伽玛同步性增加，而在第二阶段的学习中伽玛同步性增强。在低Att-Imp个体中，与第一阶段学习相比，第二，第二阶段的颞叶同步性在颞，顶和额顶大脑区域之间降低。这些发现可能为理解结果处理，注意冲动和学习能力提供有价值的线索。我们建议与惩罚相关的θ和伽马波在学习过程中起主导作用。

"点击查看英文标题和摘要"

EEG oscillatory activity associated to monetary gain and loss signals in a learning task: effects of attentional impulsivity and learning ability.

This study investigated the influence of individual differences in attentional impulsivity (Att-Imp), learning ability, and learning practice on oscillatory activity and phase synchrony responses to monetary gain and loss signals during an instrumental-learning task in healthy women. We used a trial-by-trial wavelet-based time-frequency analysis of the electroencephalographic (EEG) signal to provide amplitude and inter-site phase synchrony measures from 30 electrodes in theta (4-8 Hz, 350-500 ms), alpha (8-12 Hz, 100-200 ms), beta (13-25 Hz, 100-200 ms), and gamma (30-40 Hz, 350-450 ms) time-frequency ranges. Oscillatory amplitude and inter-site phase synchrony were both greater following loss signals as compared to gain signals in theta, beta, and gamma frequency bands. Low Att-Imp subjects had higher theta activity within a 350-500 ms time window over frontocentral, and centroparietal sites than high Att-Imp subjects. Monetary gain signals elicited higher theta and gamma activities in high Att-Imp individuals and loss signals elicited higher activities to loss signals in low Att-Imp individuals. Good learners showed enhanced intrahemispheric theta synchrony between frontoparietal, and fronto-occipital sites to monetary loss compared to gain signals. In good learners, monetary loss produced an increase of gamma synchrony that enhanced in the second stage of learning. In low Att-Imp individuals, there was a reduction of theta synchrony during the second stage, as compared with the first stage of learning, between temporal, parietal and fronto-parietal brain regions. These findings may offer valuable clues to understand outcome processing, attentional impulsivity, and learning ability. We propose that the punishment-related theta and gamma waves play a leading role in learning process.

更新日期：2019-11-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南