Top-down知觉加工下的视觉传导特征  

Characteristics of visual conduction under Top-down perceptual processing

作　　者：周爱保[1] 岳红云 刘显翠[1] 张奋[1] Ai-Bao Zhou;Hong-Yun Yue;Xian-Cui Liu;Fen Zhang(School of Psychology, the Northwest Normal University, Lanzhou 730070, Gansu Province, China;Department of Ophthalmology, the 940 Hospital of Joint Logistic Support Force of PLA, Lanzhou 730050, Gansu Province, China)

机构地区：[1]西北师范大学心理学院,中国甘肃省兰州市730070 [2]中国人民解放军联勤保障部队第九四○医院眼科,中国甘肃省兰州市730050

出　　处：《国际眼科杂志》2021年第4期742-744,共3页International Eye Science

摘　　要：目的:研究Top-down知觉通路参与儿童视觉传导效率及其特征。方法:选取2020-01/06于我院门诊进行健康查体的儿童志愿者26名,采用儿童自我颜面部特征明显的照片作为Top-down知觉注视点图片,通过图形视觉诱发电位(PVEP)检查记录N75潜时、P100波峰时间、P100波幅及P100复极化时间。结果:不同视知觉加工路径对N75潜时无显著影响,而不同空间频率对N75潜时具有显著影响,高频空间刺激下N75潜时延长。视知觉加工路径与空间频率的交互作用对P100峰值时间呈现显著影响,Top-down条件下,高频空间刺激时P100波峰值出现时间显著缩短。不同视知觉加工路径和空间频率均对P100波幅影响显著,高频空间刺激下,Top-down知觉途径对P100波幅的影响显著。不同视知觉加工路径和空间频率均对P100波复极化时间影响显著,而加工路径与空间频率的交互作用影响不显著。结论:Top-down知觉途径参与下的儿童视觉过程视觉传导速度得到提高,视觉传导效率提高。AIM:To study the visual efficiency and characteristics of Top-down perceptual pathway in children.METHODS:Totally 26 children volunteers in the outpatient department from January to June 2020 were selected.We adopted the photos of children’s self-face as the Top-down perceptive fixation point pictures.The N75 time,P100 peak time,P100 amplitude and P100 repolarization time were recorded by graphic visual evoked potential(PVEP)examination.RESULTS:Different visual perception pathway had no significant effect on the latency of N75,while different spatial frequencies have a significant effect on the N75 time.The latency of N75 was prolonged under high frequency spatial stimulation.The interaction between visual perceptual processing path and spatial frequency has a significant effect on the peak time of P100.Under Top-down condition,the peak time of P100 was significantly shortened under high-frequency spatial stimulus.Different visual perception paths and spatial frequencies had significant effects on P100 amplitude,and Top-down perceptual processing and spatial frequencies had significant effects on the time of P100 wave repolarization,while the interaction between processing paths and spatial frequencies had no significant effects.CONCLUSION:Under Top-down visual perceptual,the visual conduction velocity and visual condition efficiency are improved in children’s visual process.

关 键 词：Top-down知觉通路 Bottom-up知觉通路 图形视觉诱发电位 自我相关视觉 视知觉 

分 类 号：R339.14[医药卫生—人体生理学]