Human exposure to the electromagnetic field emitted by wireless communication systems has raised public concerns. There were claims of the potential association of some neurophysiological disorders with the exposure, but the mechanism is yet to be established. The wireless networks, recently, experience a transition from the 4th generation (4G) to 5th generation (5G), while 4G long-term evolution (LTE) is still the frequently used signal in wireless communication. In the study, exposure experiments were conducted using the LTE signal. The subjects were divided into sham and real exposure groups. Before and after the exposure experiments, they underwent functional magnetic resonance imaging. Within-session and between-session comparisons have been executed for functional connectivity and network properties. Individual specific absorption rate (SAR) was also calculated. The results indicated that acute LTE exposure beneath the safety limits modulated both the functional connection and graph-based properties. To characterize the effect of functional activity, SAR averaged over a certain tissue mass was not an appropriate metric. The potential neurophysiological effect of 5G exposure has also been discussed in the study.

中文翻译：

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对人类暴露于长期进化信号的功能和网络分析。

人类暴露于无线通信系统发射的电磁场引起了公众的关注。有人声称某些神经生理疾病可能与暴露有关，但机制尚待确定。最近，无线网络经历了从第四代（4G）到第五代（5G）的过渡，而4G长期演进（LTE）仍然是无线通信中经常使用的信号。在这项研究中，使用LTE信号进行了曝光实验。受试者分为假组和真实暴露组。在曝光实验前后，他们进行了功能磁共振成像。会话内和会话间比较已针对功能连接性和网络属性执行。还计算了个体比吸收率（SAR）。结果表明，LTE暴露在安全极限以下会调节功能连接和基于图的属性。为了表征功能活性的影响，在特定组织质量上平均的SAR不是合适的指标。该研究还讨论了5G暴露的潜在神经生理作用。