电离辐射对人脑影响的脑电信号分析

Effects of radiation on brain based on EEG signal

目的空间辐射是影响航天员健康、工效的重要环境要素。本研究探索辐射对脑电信号的影响规律,以期为深入研究辐射对中枢神经系统(脑)损伤作用提供参考。方法采集放疗志愿者接受射线辐射前后的静息态脑电信号(EEG),通过频谱分析、非线性动力学特征分析、相关系数和微状态分析等方法,研究辐射对EEG的影响规律。结果辐射诱导EEG频谱出现“慢波化”现象,重心频率、样本熵和复杂度下降,疲劳指标上升。EEG微状态C的平均持续时间和频率下降,微状态A与微状态C的平均相关系数上升,微状态D的平均持续时间下降。结论辐射导致神经元兴奋性下降,可能影响认知脑网络和大脑注意力。本研究可为辐射对中枢神经系统(脑)损伤研究提供依据。

Objective Space radiation is an important environmental factor affecting the health and efficiency of astronauts.To explore the effects of radiation on electroencephalogram(EEG)signal,and to provide references for further study of the effects of radiation on Central Nervous System(brain)injury.Methods The resting state EEG of radiotherapy volunteers were collected before and after X-ray exposure.The effects of radiation on EEG was studied by means of spectral analysis,nonlinear dynamic characteristic analysis,correlation coefficient analysis and microstate analysis.Results The results show that radiation induced a“slow wave”phenomenon in the EEG spectrum,with a decrease in Gravity Frequency,Sample Entropy,and Lempel-Ziv Complexity,and an increase in Fatigue Index.The average duration and frequency of EEG microstate C both significantly decreased,and the proportion of time for microstate D decreased,while the average correlation coefficient between microstates A and C increased.Conclusion A decrease was induced by radiation in neuronal excitability,which may affect cognitive brain networks and brain attention.This study can provide reference for the study of radiation damage to the Central Nervous System(brain).