CAJ | 학술논문

双眼视差在立体视觉中发挥着重要的作用,然而到目前为止双眼视差引起的立体视觉如何激活大脑皮层仍没有得出一致结论,需进一步研究.因此设计了一组功能核磁共振(functional Magnetic Resonence Imaging,fMRI)实验来定位与立体视觉有关的大脑皮层,实验中使用改进的随机点立体图(Random D Stereogram,RDS)作为视觉刺激,采用块状实验设计并使用 SPM8分析数据.结果如下：1)hV3A(V3辅助区上侧),LG(舌回)hMT/V5(第5视区上侧)LOS (枕外侧沟)以及 VIPS(腹侧顶内沟)是主要激活区.2)背侧视觉通路激活强烈而腹侧视觉通路激活较少.由此推论：1)没有一个单独的区域或皮层可以完全解释立体视觉感知,立体视觉的形成是不同区域通力合作的结果.2)背侧视觉通路在处理立体视觉中发挥着重要的作用.实验中得到的激活区域与其他实验结果有些差异这里主要讨论大脑激活区域以及产生差异的原因,通过分析比较这些结果,立体视觉的机制可以得到进一步的理解.如果可以明确立体视觉正常者的激活区域,那么利用 fMRI扫描来筛查弱视会更简单有效.
쌍안시차재입체시각중발휘착중요적작용,연이도목전위지쌍안시차인기적입체시각여하격활대뇌피층잉몰유득출일치결론,수진일보연구.인차설계료일조공능핵자공진(functional Magnetic Resonence Imaging,fMRI)실험래정위여입체시각유관적대뇌피층,실험중사용개진적수궤점입체도(Random D Stereogram,RDS)작위시각자격,채용괴상실험설계병사용 SPM8분석수거.결과여하：1)hV3A(V3보조구상측),LG(설회)hMT/V5(제5시구상측)LOS (침외측구)이급 VIPS(복측정내구)시주요격활구.2)배측시각통로격활강렬이복측시각통로격활교소.유차추론：1)몰유일개단독적구역혹피층가이완전해석입체시각감지,입체시각적형성시불동구역통력합작적결과.2)배측시각통로재처리입체시각중발휘착중요적작용.실험중득도적격활구역여기타실험결과유사차이저리주요토론대뇌격활구역이급산생차이적원인,통과분석비교저사결과,입체시각적궤제가이득도진일보적리해.여과가이명학입체시각정상자적격활구역,나요이용 fMRI소묘래사사약시회경간단유효.
Binocular disparity is of vital importance in stereoscopic vision. How binocular disparity activates brain regions has not been conclusively elaborated.An fMRI (functional magnetic resonance imaging) experiment was designed to locate cortex areas related to stereoscopic vision using modified random dot stereogram (RDS)as stimuli.Adopted block design was used and SPM8 was used to analyze data.It has been found that hV3A,LG,hMT/V5,LOS and VIPS were the main activated regions.The dorsal stream areas were strongly activated while ventral stream areas were only slightly activated.Therefore(here was no single region that could account for stereoscopic depth perception completely. Stereoscopic vision was probably produced by several regions together.(he dorsal stream system played an important role in processing stereoscopic vision. Some differences were found between the activating areas and results from previous experiments,and these were discussed.A comparison was made with other studies,to further understand mechanisms of binocular disparity.If activation areas among people with normal stereoscopic vision could be made clear and definitive,it would contribute to screening amblyopia more easily and efficiently by using fMRI scanning.