过度使用互联网对脑电事件相关电位gamma节律同步效应的影响研究

Effect of excessive internet use on activity synchronization of gamma oscillation and ERP components

本文应用小波变换和短时傅里叶变换的方法研究过度使用互联网对脑电事件相关电位(event-related potentials,ERP) gamma节律同步效应的影响。采用汉字认知失匹配实验,分别采集过度使用互联网者与正常受试者的ERP,并利用小波变换分别提取ERP中的gamma节律成分,然后利用Gabor变换对其进行时频分析。结果发现对于正常受试者,gamma节律的活动与ERP的N200、P300、N400具有明显的同步效应。然而对于过度使用互联网者,其gamma节律活动较正常受试者明显减弱.并且其gamma节律的同步效应较正常受试者明显延迟。此结果说明过度使用互联网对于脑电gamma节律同步效应产生了负性影响,这表明过度使用互联网对于大脑进行信息的整合和编码造成了影响。

In this paper, the effects of excessive internet use on the gamma oscillation synchronization are investigated using wavelet transform and Short-Time Fourier Transform （STFT）. The Event-Related Potentials （ERP） of normal persons and excessive internet users were acquired respectively in the Chinese character mismatch experiment. Then the multi-resolution wavelet algorithm was used to extract the Gamma components and Gabor transform was applied to do the time-frequency analysis. Experiment results show that the gamma oscillation of normal persons is strongly phase-locked with the endogenous components of ERP（N200, P300, N400）. However for excessive internet users, the gamma oscillation is obviously weaker than that of normal persons and the activity synchronization of gamma oscillation is obviously behind that of normal persons. In addition, the experiment results also show that the excessive internet use affects the information integration and coding of the brain.