Studler Mirjam, Gianotti Lorena R R, Koch Katharina, Hausfeld Jan, Tarokh Leila, Maric Angelina, Knoch Daria
Department of Social Neuroscience and Social Psychology, Institute of Psychology, University of Bern, Fabrikstrasse 8, Bern 3012, Switzerland.
Department of Social Neuroscience and Social Psychology, Institute of Psychology, University of Bern, Fabrikstrasse 8, Bern 3012, Switzerland.
Neuroimage. 2022 Jun;253:119086. doi: 10.1016/j.neuroimage.2022.119086. Epub 2022 Mar 10.
In everyday life, we have to make decisions under varying degrees of risk. Even though previous research has shown that the manipulation of sleep affects risky decision-making, it remains unknown whether individual, temporally stable neural sleep characteristics relate to individual differences in risk preferences. Here, we collected sleep data under normal conditions in fifty-four healthy adults using a portable high-density EEG at participants' home. Whole-brain corrected for multiple testing, we found that lower slow-wave activity (SWA, an indicator of sleep depth) in a cluster of electrodes over the right prefrontal cortex (PFC) is associated with higher individual risk propensity. Importantly, the association between local sleep depth and risk preferences remained significant when controlling for total sleep time and for time spent in deep sleep, i.e., sleep stages N2 and N3. Moreover, the association between risk preferences and SWA over the right PFC was very similar in all sleep cycles. Because the right PFC plays a central role in cognitive control functions, we speculate that local sleep depth in this area, as reflected by SWA, might serve as a dispositional indicator of self-regulatory ability, which in turn reflects risk preferences.
在日常生活中，我们必须在不同程度的风险下做出决策。尽管先前的研究表明，睡眠的操控会影响风险决策，但个体在时间上稳定的神经睡眠特征是否与风险偏好的个体差异相关仍不清楚。在这里，我们使用便携式高密度脑电图在参与者家中收集了54名健康成年人在正常条件下的睡眠数据。在对全脑进行多重检验校正后，我们发现右侧前额叶皮层（PFC）上一组电极处较低的慢波活动（SWA，睡眠深度指标）与较高的个体风险倾向相关。重要的是，在控制总睡眠时间和深度睡眠时间（即睡眠阶段N2和N3）后，局部睡眠深度与风险偏好之间的关联仍然显著。此外，在所有睡眠周期中，右侧PFC上的风险偏好与SWA之间的关联非常相似。由于右侧PFC在认知控制功能中起核心作用，我们推测该区域的局部睡眠深度（由SWA反映）可能作为自我调节能力的一种倾向性指标，进而反映风险偏好。
