小柯机器人

全景视觉统计塑造视网膜范围内的感受野组织
2023-03-30 15:40

奥地利科学技术研究所Maximilian Joesch团队近期取得重要工作进展,他们研究提出了全景视觉统计塑造视网膜范围内的感受野组织的观点。相关研究成果2023年3月23日在线发表于《自然—神经科学》杂志上。

据介绍,自然场景的统计数据并不一致,从地面到天空,它们的结构变化很大。目前尚不清楚这些不均匀性是否反映在早期视觉系统的大规模组织中,以及这种适应会带来什么好处。

通过有效编码假设,研究人员预测整个视觉空间感受野结构的变化会提高感觉编码的效率。使用小鼠作为模型动物,研究人员发现视网膜神经节细胞的感受野沿着视网膜背腹侧轴改变了它们的形状,在视界处有明显的环绕不对称,这与他们预测的结果一致。

总之,这一工作表明,根据有效编码的原则,视网膜可以在空间和细胞类型上利用自然场景的全景结构。

附:英文原文

Title: Panoramic visual statistics shape retina-wide organization of receptive fields

Author: Gupta, Divyansh, Mynarski, Wiktor, Sumser, Anton, Symonova, Olga, Svato, Jan, Joesch, Maximilian

Issue&Volume: 2023-03-23

Abstract: Statistics of natural scenes are not uniform—their structure varies dramatically from ground to sky. It remains unknown whether these nonuniformities are reflected in the large-scale organization of the early visual system and what benefits such adaptations would confer. Here, by relying on the efficient coding hypothesis, we predict that changes in the structure of receptive fields across visual space increase the efficiency of sensory coding. Using the mouse (Mus musculus) as a model species, we show that receptive fields of retinal ganglion cells change their shape along the dorsoventral retinal axis, with a marked surround asymmetry at the visual horizon, in agreement with our predictions. Our work demonstrates that, according to principles of efficient coding, the panoramic structure of natural scenes is exploited by the retina across space and cell types.

DOI: 10.1038/s41593-023-01280-0

Source: https://www.nature.com/articles/s41593-023-01280-0

Nature Neuroscience:《自然—神经科学》,创刊于1998年。隶属于施普林格·自然出版集团,最新IF:28.771
官方网址:https://www.nature.com/neuro/
投稿链接:https://mts-nn.nature.com/cgi-bin/main.plex


本期文章:《自然—神经科学》:Online/在线发表

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