Frontal midline theta and N200 amplitude reflect complementary information about expectancy and outcome evaluation
Frontal midline theta and N200 amplitude reflect complementary information about expectancy and outcome evaluation
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DOI：
10.1111/psyp.12040
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发表时间：
2013-06-01
期刊：
影响因子：
3.7
通讯作者：
Holroyd, Clay B.
中科院分区：
文献类型：
--
作者：
Hajihosseini, Azadeh;Holroyd, Clay B.
反馈 ERN (fERN) 和额叶中线 theta 都被提议用来索引前扣带皮层 (ACC) 中的类多巴胺强化学习信号。我们通过比较 fERN 幅度和 theta 功率对先前收集的脑电图数据集中的结果效价和概率的敏感性来研究这些建议。贝叶斯模型比较揭示了两种测量之间的分离，fERN 幅度主要对化合价敏感，theta 功率主要对概率敏感。此外，fERN 幅度与试验中相位一致的 θ 功率部分（即诱发 θ 功率）高度相关。这些结果表明，虽然这两种测量都提供了有关额叶中线皮层认知功能的有价值的信息，但 fERN 幅度对多巴胺强化学习信号特别敏感，而 theta 功率反映了 ACC 对意外事件的反应。
Feedback ERN (fERN) and frontal midline theta have both been proposed to index a dopamine-like reinforcement learning signal in anterior cingulate cortex (ACC). We investigated these proposals by comparing fERN amplitude and theta power with respect to their sensitivities to outcome valence and probability in a previously collected EEG dataset. Bayesian model comparison revealed a dissociation between the two measures, with fERN amplitude mainly sensitive to valence and theta power mainly sensitive to probability. Further, fERN amplitude was highly correlated with the portion of theta power that is consistent in phase across trials (i.e., evoked theta power). These results suggest that although both measures provide valuable information about cognitive function of frontal midline cortex, fERN amplitude is specifically sensitive to dopamine reinforcement learning signals whereas theta power reflects the ACC response to unexpected events.