Social, Cognitive and Affective Neuroscience Lab., University of Arizona College of Medicine, United States.
Social, Cognitive and Affective Neuroscience Lab., University of Arizona College of Medicine, United States.
Neurosci Lett. 2020 Sep 14;735:135242. doi: 10.1016/j.neulet.2020.135242. Epub 2020 Jul 8.
Exposure to light, particularly blue-wavelength light, has been shown to acutely increase brain activation, alertness, and some elementary aspects of cognitive performance such as working memory and emotional anticipation. Whether blue light exposure can have effects on brain activation and performance during more complex cognitive control tasks up to 30 min after light cessation is unknown. In a sample of 32 healthy adults, we examined the effects of a 30 min exposure to either blue (n = 16) or amber control (n = 16) light on subsequent brain activation and performance during the Multi-Source Interference Task (MSIT) measured a half-hour after light exposure. Performance on the MSIT did not differ between the blue and amber conditions. However, brain activation within the task positive network (TPN) to the interference condition was significantly lower in the blue relative to the amber condition, while no group differences were observed for suppression of the default mode network (DMN). These findings suggest that, compared to control, a single exposure to blue light was associated with enhanced neural efficiency, as demonstrated by reduced TPN activation to achieve the same level of performance. Blue light may be an effective method for optimizing neurocognitive performance under some conditions.
暴露在光线下，特别是蓝色波长的光线下，已被证明可以急性增加大脑的活跃度、警觉度和一些认知表现的基本方面，如工作记忆和情绪预期。在停止光照 30 分钟后，蓝色光暴露是否会对更复杂的认知控制任务中的大脑激活和表现产生影响尚不清楚。在 32 名健康成年人的样本中，我们研究了 30 分钟暴露于蓝色（n=16）或琥珀色控制光（n=16）对光照后半小时进行的多源干扰任务（MSIT）期间后续大脑激活和表现的影响。MSIT 上的表现在蓝色和琥珀色条件之间没有差异。然而，与琥珀色条件相比，蓝色条件下干扰条件下任务正网络（TPN）的大脑激活明显降低，而默认模式网络（DMN）的抑制则没有观察到组间差异。这些发现表明，与对照相比，单次暴露于蓝光与增强的神经效率相关，表现为为达到相同的表现水平，TPN 激活减少。在某些情况下，蓝光可能是优化神经认知表现的有效方法。
