Mindfulness Training in High-Demand Cohorts Alters Resting-State Electroencephalography: An Exploratory Investigation of Individual Alpha Frequency, Aperiodic 1/f Activity, and Microstates

IF 4 Q2 NEUROSCIENCES
Chloe A. Dziego , Anthony P. Zanesco , Ina Bornkessel-Schlesewsky , Matthias Schlesewsky , Elizabeth A. Stanley , Amishi P. Jha
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Abstract

Background

Mindfulness training (MT) programs have demonstrated utility as cognitive training tools, but there is little consensus on the neurophysiological processes that may underlie its benefits. It has been posited that intrinsic brain activity recorded at rest reflects the functional connectivity of large-scale brain networks and may provide insight into neuroplastic changes that support MT. In the current study, we indexed changes in several resting-state electroencephalography (EEG) parameters to investigate the neurophysiological underpinnings of MT.

Methods

Resting-state EEG data were collected from active-duty U.S. military personnel (N = 80) at 2 testing sessions: before (time [T] 1) and after (T2) engaging in an 8-week MT or active comparison intervention (positivity training). We examined longitudinal and/or groupwise differences in several EEG parameters through parameterization of power spectra (individual alpha frequency and 1/f activity) and microstate analysis.

Results

While no significant group × time differences were observed in individual alpha frequency, significant group × time effects were observed in several EEG parameters from T1 to T2. Compared with MT, positivity training was associated with a steepening of the 1/f slope and higher 1/f intercepts together with decreased duration and increased global field power of microstates.

Conclusions

Taken together, these results suggest that the effects of interventions may be differentiated in resting-state brain activity in a sample of military personnel. Such findings provide insight into the neural underpinnings of MT-related brain changes, but more research is required to elucidate how these may relate to task-related neural and performance changes with MT and whether results generalize to other mindfulness interventions in alternative cohorts and contexts.
高需求群体中的正念训练会改变静息态脑电图:对个体阿尔法频率、非周期性 1/f 活动和微观状态的探索性研究
背景正念训练(Mindfulness Training,MT)项目已被证明是一种有效的认知训练工具,但对于其益处所依赖的神经生理过程却鲜有共识。有人认为,静息状态下记录到的内在大脑活动反映了大规模大脑网络的功能连接性,可能有助于了解支持正念训练的神经可塑性变化。在当前的研究中,我们对静息状态脑电图(EEG)的几个参数的变化进行了索引,以研究 MT 的神经生理学基础。方法:我们收集了现役美国军人(N = 80)在两次测试中的静息状态脑电图数据:在参加为期 8 周的 MT 或积极比较干预(积极性训练)之前(时间 [T] 1)和之后(T2)。我们通过功率谱参数化(单个阿尔法频率和 1/f 活动)和微状态分析研究了几个脑电图参数的纵向和/或组间差异。结果虽然在单个阿尔法频率上没有观察到显著的组间 × 时间差异,但在 T1 到 T2 的几个脑电图参数上观察到显著的组间 × 时间效应。与 MT 相比,积极性训练与 1/f 斜率变陡、1/f 截距增大以及微态持续时间缩短和全场功率增大有关。这些发现为了解与 MT 相关的大脑变化的神经基础提供了洞察力,但还需要更多的研究来阐明这些变化与 MT 任务相关的神经和表现变化之间的关系,以及这些结果是否能推广到其他队列和环境中的其他正念干预。
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来源期刊
Biological psychiatry global open science
Biological psychiatry global open science Psychiatry and Mental Health
CiteScore
4.00
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91 days
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