Spatiotemporal alterations in the brain oscillations of Arctic explorers

IF 3.5 3区 医学 Q2 NEUROSCIENCES
Yong-Bo Hu , Jing Lu , Hong-Xia Li , Craig S. Anderson , Zhong-Min Liu , Bei Zhang , Jun-Jie Hao
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引用次数: 0

Abstract

Background

The limited understanding of the physiology and psychology of polar expedition explorers has prompted concern over the potential cognitive impairments caused by exposure to extreme environmental conditions. Prior research has demonstrated that such stressors can negatively impact cognitive function, sleep quality, and behavioral outcomes. Nevertheless, the impact of the polar environment on neuronal activity remains largely unknown.

Methods

In this study, we aimed to investigate spatiotemporal alterations in brain oscillations of 13 individuals (age range: 22–48 years) who participated in an Arctic expedition. We utilized electroencephalography (EEG) to record cortical activity before and during the Arctic journey, and employed standardized low resolution brain electromagnetic tomography to localize changes in alpha, beta, theta, and gamma activity.

Results

Our results reveal a significant increase in the power of theta oscillations in specific regions of the Arctic, which differed significantly from pre-expedition measurements. Furthermore, microstate analysis demonstrated a significant reduction in the duration of microstates (MS) D and alterations in the local synchrony of the frontoparietal network.

Conclusion

Overall, these findings provide novel insights into the neural mechanisms underlying adaptation to extreme environments. These findings have implications for understanding the cognitive consequences of polar exploration and may inform strategies to mitigate potential neurological risks associated with such endeavors. Further research is warranted to elucidate the long-term effects of Arctic exposure on brain function.

北极探险者大脑振荡的时空变化。
背景:由于对极地探险者的生理和心理了解有限,人们开始关注暴露在极端环境条件下可能造成的认知障碍。先前的研究表明,这种压力会对认知功能、睡眠质量和行为结果产生负面影响。然而,极地环境对神经元活动的影响在很大程度上仍是未知数:在这项研究中,我们旨在调查 13 名参加北极探险的人员(年龄范围:22 - 48 岁)大脑振荡的时空变化。我们利用脑电图(EEG)记录了北极探险前和探险过程中的大脑皮层活动,并采用标准化的低分辨率脑电磁断层扫描来定位α、β、θ和γ活动的变化:结果:我们的研究结果表明,在北极的特定区域,θ振荡的功率明显增加,这与考察前的测量结果有很大不同。此外,微状态分析表明,微状态(MS)D的持续时间显著缩短,额顶网络的局部同步性也发生了变化:总之,这些研究结果为了解适应极端环境的神经机制提供了新的视角。这些研究结果对理解极地探索的认知后果具有重要意义,并可为减轻与极地探索相关的潜在神经风险的策略提供参考。为了阐明北极暴露对大脑功能的长期影响,我们有必要开展进一步的研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Brain Research Bulletin
Brain Research Bulletin 医学-神经科学
CiteScore
6.90
自引率
2.60%
发文量
253
审稿时长
67 days
期刊介绍: The Brain Research Bulletin (BRB) aims to publish novel work that advances our knowledge of molecular and cellular mechanisms that underlie neural network properties associated with behavior, cognition and other brain functions during neurodevelopment and in the adult. Although clinical research is out of the Journal''s scope, the BRB also aims to publish translation research that provides insight into biological mechanisms and processes associated with neurodegeneration mechanisms, neurological diseases and neuropsychiatric disorders. The Journal is especially interested in research using novel methodologies, such as optogenetics, multielectrode array recordings and life imaging in wild-type and genetically-modified animal models, with the goal to advance our understanding of how neurons, glia and networks function in vivo.
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