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Dynamic Changes in EEG Power Spectral Densities During NIH-Toolbox Flanker, Dimensional Change Card Sort Test and Episodic Memory Tests in Young Adults
Frontiers in Human Neuroscience ( IF 2.9 ) Pub Date : 2020-05-19 , DOI: 10.3389/fnhum.2020.00158
Judith G Foy 1 , Michael R Foy 1
Affiliation  

Much is known about electroencephalograph (EEG) patterns during sleep, but until recently, it was difficult to study EEG patterns during conscious, awake behavior. Technological advances such as powerful wireless EEG systems have led to a renewed interest in EEG as a clinical and research tool for studying real-time changes in the brain. We report here the first normative study of EEG activity while healthy young adults completed a series of cognitive tests recently published by the National Institutes of Health Toolbox Cognitive Battery (NIH-TCB), a commonly-used standardized measure of cognition primarily used in clinical populations. In this preliminary study using a wireless EEG system, we examined power spectral density (PSD) in four EEG frequency bands. During baseline and cognitive testing, PSD activity for the lower frequency bands (theta and alpha) was greater, relative to the higher frequency bands (beta and gamma), suggesting participants were relaxed and mentally alert. Alpha, beta and gamma activity was increased during a memory test compared to two other, less demanding executive function tests. Gamma activity was also inversely correlated with performance on the memory test, consistent with the neural efficiency hypothesis which proposes that better cognitive performance may link with lower cortical energy consumption. In summary, our study suggests that cognitive performance is related to the dynamics of EEG activity in a normative young adult population.

中文翻译:

年轻人在 NIH-Toolbox Flanker、维度变化卡片分类测试和情景记忆测试中脑电图功率谱密度的动态变化

人们对睡眠期间的脑电图 (EEG) 模式了解很多,但直到最近,研究有意识、清醒行为期间的脑电图模式仍然很困难。强大的无线脑电图系统等技术进步重新引起了人们对脑电图作为研究大脑实时变化的临床和研究工具的兴趣。我们在这里报告了第一个关于脑电图活动的规范性研究,同时健康的年轻人完成了美国国立卫生研究院认知电池工具箱(NIH-TCB)最近发布的一系列认知测试,这是一种主要用于临床人群的常用标准化认知测量方法。在这项使用无线脑电图系统的初步研究中,我们检查了四个脑电图频段的功率谱密度(PSD)。在基线和认知测试期间,较低频段(theta 和 alpha)的 PSD 活动相对于较高频段(beta 和 gamma)更大,表明参与者放松且精神警觉。与其他两项要求较低的执行功能测试相比,记忆测试中的α、β和γ活性有所增加。伽玛活动也与记忆测试的表现呈负相关,这与神经效率假说一致,该假说认为更好的认知表现可能与较低的皮质能量消耗有关。总之,我们的研究表明,在正常的年轻成年人群中,认知表现与脑电图活动的动态相关。
更新日期:2020-05-19
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