摘要
目的通过志愿者观看2D和3D电视后的EEG实验研究人脑的专注度特征。方法采集20名志愿者观看2D、3D电视前后的EEG信号,利用小波变换进行时频处理,探讨脑电的重心频率(Gravity Frequency,GF)变化情况;分析观看2D、3D电视后EEG不同电极的样本熵分布,绘制样本熵差值脑电地形图;结合主观专注度问卷,分析3D电视对人脑专注度的影响。结果时频分析和功率谱密度结果分析发现,相对于2D电视,观看3D电视后脑电信号向低频处移动的更加明显,且各个电极通道的样本熵均比观看2D电视后的小,在O1、O2、Oz、Fp1、Fp2、P3、P4、Pz通道处该对比尤其明显(P<0.05)。结论观看3D电视比观看2D电视后志愿者的专注度下降幅度大,前额和枕叶区域更明显。本研究表明,长时间观看3D电视会降低人的短时大脑专注度,有可能对人脑的长期专注度产生一定的影响。
Objective The study aims at finding the effect of watching 2D and 3D television on human concentration by comparing the changes of EEG parameters after viewing 2D and 3D TV. Methods Twenty volunteers＇ EEG signals were acquired before and after watching 2D and 3D TV. The time-frequency analysis was performed by using wavelet transformation. Gravity frequency was calculated and the sample entropy（SampEn） distribution of EEG signals after 2D and 3D TV viewing at each electrode channel was depicted. The subjective concentration questionnaire was combined to analyze the effect of 3D TV on concentration. Results The time-frequency analysis and the power spectral density showed that the EEG signals moved more obviously to the low frequency than that caused by watching 2D TV. The sample entropy of each electrode channel was smaller than that after watching the 2D TV, especially at O1, 02, Oz, Fpl, Fp2, P3, P4 and Pz channels （P 〈0.05）. Conclusions Volunteers＇ concentration became lower when people watched 3D TV than that caused by watching 2D TV, especially at forehead and occipital lobe. This study showed that watching 3D TV for a long periods of time could reduce human short-term brain concentration, and might have adverse effect on the long-term concentration of the human brain.
出处
《生命科学仪器》
2017年第6期31-36,共6页
Life Science Instruments
基金
南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20170312)
关键词
专注度
时频分析
样本熵
3D电视
Concentration
Time-frequency analysis
The sample entropy
3D TV
