追踪任务下脑波频率特征的变化特点研究

发布时间：2018-07-04 23:52

本文选题：脑电图 + 频率涨落分析　；参考：《航天医学与医学工程》2017年05期

【摘要】：目的考察静态与不同难度追踪任务下脑波功率谱及优势频率涨落特征间的差异和变化特点。方法记录5名青中年男性静态(闭眼)和执行追踪任务过程中的EEG数据,应用脑波频率涨落分析技术分析相关的α段频率涨落特征及变化特点。结果静态与追踪任务态优势频率概率分布特征差异显著,追踪任务态优势频率概率分布曲线峰值向低频方向偏移,优势频率涨落熵显著增加,熵值的脑区分布特征显著改变,优势频率的不稳定性明显增强。不同难度追踪任务状态下优势频率序列均值及离散程度的变化与任务难度有关,优势频率涨落熵随追踪任务难度加大呈上升趋势。结论脑波α段频率涨落特征指标的变化反映了不同难度追踪任务下相关脑区活动的显著变化,表明该技术可应用于追踪任务负荷的研究。
[Abstract]:Aim to investigate the differences and variation characteristics of cerebral wave power spectrum and dominant frequency fluctuation between static and different difficulty tracking tasks. Methods EEG data of 5 young and middle-aged men were recorded in the course of static (eye closure) and tracking tasks. The characteristics and changes of 伪 segment frequency fluctuation were analyzed by using the brain wave frequency fluctuation analysis technique. Results the characteristics of probability distribution of dominant frequency in static state and tracking state were significantly different. The peak value of probability distribution curve of dominant frequency of tracking task state shifted to the direction of low frequency, the entropy of dominant frequency fluctuation increased significantly, and the distribution characteristics of brain region of entropy value changed significantly. The instability of dominant frequency is obviously enhanced. The variation of the average and discrete degree of dominant frequency series under different difficulty tracking tasks is related to the task difficulty, and the entropy of dominant frequency fluctuation increases with the increase of tracking task difficulty. Conclusion the change of the characteristic index of 伪 -segment frequency fluctuation of brain wave reflects the significant change of the activity of the related brain area under different difficulty tracking tasks, which indicates that this technique can be applied to the study of tracking task load.
【作者单位】：北京航空航天大学生物与医学工程学院;中国航天员科研训练中心人因工程重点实验室;
【基金】：国家自然科学基金青年基金(71201148) 人因工程重点实验室课题(9140C770208150C77320)
【分类号】：R857.1

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