单眼缺口立体与双眼立体在知觉阶段的神经加工差异

发布时间：2018-01-24 14:54

本文关键词： 单眼缺口立体双眼视差立体深度知觉 VEPs(视觉诱发潜电位)　出处：《华中师范大学》2014年硕士论文　论文类型：学位论文

【摘要】：目的：为了探索单眼缺口立体的神经加工机制,以及单眼缺口立体与双眼视差立体的深度加工机制是否相同。方法：实验1采用EEG技术,记录被试在观察单眼缺口立体、双眼视差立体与平面的脑电波,利用ERP技术与偶极子溯源方法,分析和比较三类刺激的VEPs与溯源结果。实验2采用EEG技术,将刺激投射至观察者右脑,比较与分析单眼缺口立体、双眼视差立体与平面在非注意条件下的VEPs与溯源结果。结果：实验1发现：(1)关于P1与N1成分的波幅与潜伏期,三类刺激(单眼缺口立体、双眼视差立体、平面)的P1成分的潜伏期与波幅,以及N1的潜伏期均无显著差异,双眼视差立体的N1波幅在右脑比平面的显著要小,单眼缺口立体与双眼视差立体的N1成分的波幅在左右脑均无显著差异；(2)关于P2与N2成分的波幅与潜伏期,三类刺激的P2与N2的潜伏期均无显著差异,双眼视差立体与平面的P2成分波幅在左枕顶、枕颞叶区域有显著的差异,两者的N2成分波幅则在左枕顶区、枕颞区、与右枕颞区有显著差异,单眼缺口立体与双眼视差立体的P2与N2成分波幅均在左枕叶与右枕顶颞叶区域显著不同；(3)对单眼缺口和双眼视差立体,以及的双眼视差立体和平面的P2与N2时间窗(185-235ms)的差异波的BESA偶极子溯源分析,结果发现单眼缺口立体与双眼视差立体的差异波存在一个单偶极子源,偶极子粗略地定位于右中颞回(middle temporal gyrus),双眼视差立体与平面的差异波也存在一个单偶极子源,但偶极子粗略地定位于右楔叶(cuneus)。实验2发现：(1)关于C1成分的潜伏期与波幅,三类刺激的C1成分的潜伏期与波幅均无显著差异；关于P1与N1成分的波幅与潜伏期,三类刺激的P1与N1成分的潜伏期与波幅均无显著差异；(2)关于P2与N2成分的波幅与潜伏期,三类刺激的P2成分的潜伏期在枕颞叶存在显著的差异,这种显著的差异主要表现在单眼缺口立体的潜伏期比双眼视差立体要长、双眼视差立体的潜伏期与平面要短,三类刺激的N2成分的潜伏期并无显著差异,双眼视差立体与平面的P2成分波幅的显著差异发生在右枕顶区、枕颞区,两者的N2成分波幅在右脑则并无显著的差异,单眼缺口立体与双眼视差立体的P2与N2成分波幅显著差异发生在右枕顶颞区。结论：(1)单眼缺口立体的早期加工机制与双眼视差立体相同,单眼缺口立体的匹配与深度加工可能和视差的匹配与计算的加工机制相同；(2)单眼缺口立体与双眼视差立体在知觉阶段的加工机制可能并不完全相同。
[Abstract]:Objective: To explore the mechanism of unilateral Nick stereoscopic nerve processing, and whether the mechanism of deep processing of monocular gap stereoscopic and binocular parallax is the same.
Methods: in Experiment 1, using EEG technology, subjects were recorded in the observation of Monocular Stereo gap, binocular stereo and plane brain waves, using ERP technology and dipole method, VEPs and tracing results analysis and comparison of three types of stimuli. In Experiment 2, using EEG technology, will stimulate the project to the observer right. The comparison and analysis of Monocular Stereo binocular disparity gap, stereo and plane under the condition of VEPs and tracing results.
Results: Experiment 1: (1) the amplitude and latency of P1 and N1 components, three types of stimuli (Monocular Stereo binocular parallax, gap, plane) latency and amplitude of P1 components, there were no significant differences between the N1 and the latency and amplitude of N1 stereo binocular parallax on the right side of the brain significantly smaller than the plane Monocular Stereo and binocular disparity gap, three-dimensional N1 amplitudes in the brain showed no significant difference; (2) amplitude and latency on the P2 and N2 components, there were no significant differences between P2 and N2 three kinds of stimulus latency, binocular parallax stereo and plane P2 component amplitude in the left occipital parietal and occipital temporal the leaf area had significant differences, the two components of N2 amplitude in the left parietal occipital area, occipital temporal region and right occipital temporal region had significant difference with monocular binocular parallax stereo stereo gap P2 and N2 components amplitudes were in the left occipital lobe and the right parietal occipital temporal regions were significantly different; (3) to single Eye and binocular disparity gap, and the binocular parallax stereoscopic and plane P2 and N2 time window (185-235ms) analysis of the BESA dipole difference wave, the results revealed that differences in monocular and binocular stereo disparity gap stereo wave has a single dipole dipole source, roughly located in the back in the right temporal (middle temporal gyrus), binocular stereo and plane wave difference and the existence of a single dipole dipole, but roughly located in right cuneus (cuneus). Experiment 2: (1) on the latency and amplitude of C1 components, there were no significant differences in latency and amplitude of three stimulus C1 amplitude and latency components; on the P1 and N1 components, there were no significant differences in latency and amplitude of P1 and N1 components of three types of stimuli; (2) amplitude and latency on the P2 and N2 components, three types of stimuli P2 latency in occipital temporal lobe significantly The difference, this difference is mainly manifested in the Monocular Stereo gap latency than the binocular parallax stereo to long latency and binocular parallax three-dimensional plane to short incubation period there was no significant difference between the three types of stimuli N2 components, significant difference between binocular parallax stereo and plane P2 component amplitude occurred in right occipital parietal and occipital temporal the amplitude of N2 component area, both in the right hemisphere had no significant difference, and the gap of monocular binocular parallax stereo stereo P2 and N2 composition amplitude significant differences occurred in the right temporal parietal occipital region.
Conclusion: (1) the early processing mechanism and monocular stereo stereo binocular disparity gap, the gap of stereo matching and monocular parallax and depth processing may be the same matching and processing mechanism of calculation; (2) Monocular Stereo and binocular stereo gap in the perception phase processing mechanism may not be exactly the same.

【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：B845.1

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