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.
CONCLUSIONS: 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.
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.
CONCLUSIONS: 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.
摘要：
背景：对极地探险探险家的生理学和心理学的有限理解引起了人们对暴露于极端环境条件引起的潜在认知损害的关注。先前的研究表明，这种压力因素会对认知功能产生负面影响，睡眠质量,和行为结果。然而，极地环境对神经元活动的影响在很大程度上仍然未知。
方法：在本研究中，我们的目的是调查参与北极探险的13名个体(年龄范围:22-48岁)脑振荡的时空变化.我们利用脑电图（EEG）记录了北极旅行之前和期间的皮层活动，并采用标准化的低分辨率脑电磁断层扫描来定位alpha的变化，beta,theta,和伽马活动。
结果：我们的结果表明，北极特定地区的θ振荡功率显着增加，这与探险前的测量有很大不同。此外，微状态分析表明，微状态（MS）D的持续时间显着减少，并且额叶网络的局部同步性发生了变化。
结论：总体而言，这些发现为适应极端环境的神经机制提供了新的见解。这些发现对于理解极地探索的认知后果具有重要意义，并可能为减轻与此类努力相关的潜在神经系统风险提供策略。需要进一步的研究来阐明北极暴露对脑功能的长期影响。
方法：在本研究中，我们的目的是调查参与北极探险的13名个体(年龄范围:22-48岁)脑振荡的时空变化.我们利用脑电图（EEG）记录了北极旅行之前和期间的皮层活动，并采用标准化的低分辨率脑电磁断层扫描来定位alpha的变化，beta,theta,和伽马活动。
结果：我们的结果表明，北极特定地区的θ振荡功率显着增加，这与探险前的测量有很大不同。此外，微状态分析表明，微状态（MS）D的持续时间显着减少，并且额叶网络的局部同步性发生了变化。
结论：总体而言，这些发现为适应极端环境的神经机制提供了新的见解。这些发现对于理解极地探索的认知后果具有重要意义，并可能为减轻与此类努力相关的潜在神经系统风险提供策略。需要进一步的研究来阐明北极暴露对脑功能的长期影响。
