Suppr超能文献

将全球自上而下的观点与大脑中的第一人称观点联系起来。

Linking global top-down views to first-person views in the brain.

机构信息

Department of Cognitive Sciences, University of California, Irvine, CA 92697.

Department of Neurobiology and Behavior, University of California, Irvine, CA 92697.

出版信息

Proc Natl Acad Sci U S A. 2022 Nov 8;119(45):e2202024119. doi: 10.1073/pnas.2202024119. Epub 2022 Nov 2.

Abstract

Humans and other animals have a remarkable capacity to translate their position from one spatial frame of reference to another. The ability to seamlessly move between top-down and first-person views is important for navigation, memory formation, and other cognitive tasks. Evidence suggests that the medial temporal lobe and other cortical regions contribute to this function. To understand how a neural system might carry out these computations, we used variational autoencoders (VAEs) to reconstruct the first-person view from the top-down view of a robot simulation, and vice versa. Many latent variables in the VAEs had similar responses to those seen in neuron recordings, including location-specific activity, head direction tuning, and encoding of distance to local objects. Place-specific responses were prominent when reconstructing a first-person view from a top-down view, but head direction-specific responses were prominent when reconstructing a top-down view from a first-person view. In both cases, the model could recover from perturbations without retraining, but rather through remapping. These results could advance our understanding of how brain regions support viewpoint linkages and transformations.

摘要

人类和其他动物具有将其位置从一个空间参照系转换到另一个空间参照系的非凡能力。在自上而下的视角和第一人称视角之间无缝切换的能力对于导航、记忆形成和其他认知任务很重要。有证据表明,内侧颞叶和其他皮质区域有助于实现这一功能。为了了解神经网络系统如何执行这些计算,我们使用变分自编码器(VAEs)从机器人模拟的自上而下视图重建第一人称视图,反之亦然。VAEs 中的许多潜在变量对神经元记录中观察到的响应具有相似的响应,包括位置特异性活动、头部方向调谐以及对局部物体距离的编码。在从自上而下的视图重建第一人称视图时,位置特异性响应很突出,但是在从第一人称视图重建自上而下的视图时,头部方向特异性响应很突出。在这两种情况下,模型无需重新训练即可从干扰中恢复,而是通过重新映射来恢复。这些结果可以促进我们对大脑区域如何支持视角关联和转换的理解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aa61/9659407/dfa06d187d5e/pnas.2202024119fig01.jpg

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验