【摘要】 利用自行研制的多导视觉诱发电位(VEP)信号采集处理系统和两套视差深度随机点立体(RDS)图对,诱发视皮层神经网络兴奋发放,提取并分析了立体视觉视差深度认知过程的皮层电位信号,对视差相关诱发电位特征进行了标定.采用两种完全不同的信息处理方法重复实验,揭示了高级视皮层功能区出现的 N2 波由视差相关 VEP发放,提示体视视差深度信息处理可能是在高级视皮层功能区上完成的.根据不同功能区隐含信息的处理结果,推测大脑皮层体视信息处理系统中存在信息反馈通路.实验结果还表明,立体视觉深度认知过程是一个动态的复杂信息协同处理过程.更多还原

【Abstract】 Two sets of radom-dot-stereogram (RDS) stimulus pairs were designed to evoke excitation of neural networks in the visual cortex. A multi-channel electroencephalogram (EEG) acquisition system for stereoscopic evoked potentials was developed to extract the EEG signal during the cognitive process of stereoscopic disparity depth stimulation. The characteristics of the visual evoked potential (VEP) corresponding to disparity depth cognition were identified. A new N2 waveform in the VEP was discovered in the advanced visual cortex, which corresponded to the characteristic response to disparity depth cues. This finding was verified by two different signal processing methods, which indicates that the processing of stereoscopic depth information is done in the functional areas of advanced visual cortex. Based on the results from processing the hidden information from different functional areas, it is further conjectured that there is an information feedback circuit in the stereoscopic depth processing system of the visual cortex. The results also showed that the stereoscopic depth cognition is a multi-factored dynamic and synchronistic cooperative process.更多还原