猕猴V1和V2对轮廓线的层级加工受到图形上下文的影响
Rujia Chen a1; Feng Wang1; Hualou Liang2; Wu Li1
2017-07
会议名称2017年第二届曲阜视觉科学会议
会议日期2017.7.1
会议地点曲阜
其他摘要

PURPOSE: To investigate inter-areal and inter-laminar interactions during contour detection and their context dependency.
METHODS: Two macaque monkeys were trained to detect visual contours formed by collinear bars when a cluttered background was present or absent. We simultaneously recorded neuronal responses at retinotopically matched locations in V1 and V2 while the monkeys performed the detection task. The recordings were done with a pair of laminar probes with 24 recordings sites spaced 100 µm apart and perpendicular to the cortical surface. We quantified the contour signals in different layers of V1 and V2, dissected the inter-areal directional interactions using Granger causality, and examined the temporal dynamics of laminar interactions in the presence and absence of interfering context.
RESULTS: When the cluttered background was present, the responses of most V1 and V2 recording sites were significantly enhanced in delayed response components by the global contours centered on their receptive fields. These contour-signaling sites were mainly concentrated in V1 supragranular and upper infragranular layers, and in V2 supragranular and granular layers. These cortical layers were also the main layers showing contour-related interactions during 100-300 ms, when the contour signals rapidly increased. In contrast, when the background was absent, neuronal responses in V1 supragranular and granular layers were suppressed; responses in V2 were enhanced, but the latencies of contour-related signals were markedly shortened. Inter-areal interactions related to contour integration also shifted to early response components before 100 ms.
CONCLUSIONS: Contour grouping engages inter-areal interplay among specific cortical layers; inter-areal exchange of information takes place within a limited time window; inter-areal and inter-laminar interactions are dependent on stimulus complexity.

关键词V1 V2 laminar interactions Granger causality stimulus context.
学科领域视觉神经科学
语种英语
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/22047
专题心理所主办学术会议_2017年第二届曲阜视觉科学会议_会议摘要
作者单位1.State Key Laboratory of Cognitive Neuroscience and Learning; IDG/McGovern Institute for Brain Research, Beijing Normal University
2.School of Biomedical Engineering, Drexel University, Philadelphia, USA
推荐引用方式
GB/T 7714
Rujia Chen a,Feng Wang,Hualou Liang,等. 猕猴V1和V2对轮廓线的层级加工受到图形上下文的影响[C],2017.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Rujia Chen a]的文章
[Feng Wang]的文章
[Hualou Liang]的文章
百度学术
百度学术中相似的文章
[Rujia Chen a]的文章
[Feng Wang]的文章
[Hualou Liang]的文章
必应学术
必应学术中相似的文章
[Rujia Chen a]的文章
[Feng Wang]的文章
[Hualou Liang]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。