观看3D 电视前后的脑电变化与电极层次性布局

通过观看3D电视前后闭眼的脑电信号变化，寻找3D电视诱发的各脑区变化最明显的区域，由此研究3D电视健康评估体系专用的脑电极布局方法。选取40名身体健康，年龄在21～23岁的男性志愿者，按连续和间断两种实验模式平均分为两组，观看等长时间的3D电视，记录观看电视前后及整个过程的脑电信号；通过比较观看前后各通道间的闭眼脑电信号中α、β、θ波的3个波段相对能量、R值和A/B值的变化，统计各脑区具有统计学差异的通道数量，以分析各脑区变化的情况。由α、β、θ波的相对能量以及A/B值和R值对两组实验脑电信号分析，视觉区及其附近区域有统计学差异的通道有视觉枕区O1、O2通道及其附近的左顶P3通道、右后颞T6通道，额区及其附近有统计学差异的通道有前额FP2和左额F3通道，其余脑区中的中央区只有C4通道具有统计学差异。在3D电视诱发的脑区变化中，视觉区有最为明显的变化，额区有较为明显的变化，中央区局部略有变化。

The EEG Changes of Pre and Post Watching 3D TV and the Hierarchical Placement of EEG Electrodes

The aim of this paper is to figure out the most obvious region change of the brain function area for 3D TV by detecting eye closed EEG signal’s changes of pre and post watching 3D TV and establish the special method of EEG electrode placement for 3D TV health assessment. Fourty of healthy, age at 21～23 years old male volunteers was selected. The experiment volunteers were divided into two groups to watch the same time 3D TV in a continuous or discontinuous experimental mode. The EEG signal of pre and post watching 3D TV in the whole experimental process was recorded. By contrasting the changes of three bands α, β and θ waves’ relative energy, R value and A/B value of all channels of pre and post watching 3D TV eye closed signal and counting the number of the channels with the statistical significance in all the brain regions, the changes in various brain regions was analized. By analyzing α, β, θ wave relative energy, A/B value and R value of the two groups’ EEG signal, in the vision region and its vicinity the channels with the statistical significance were O1, O2, P3 and T6 channels; in the frontal region the channels with the statistical significance were FP2, F3 channels; in the rest of the regions, only the central region channel C4 had statistical significant variation. The most obvious change in every brain region was the vision region followed by the frontal region; the central zone was the slight obvious region.