浙江大学Anna Wang Roe、胡吉明和张晓彤研究组合作发现了猕猴视觉皮层中多个眼窝视觉的位置。相关论文于2024年12月5日发表在《自然—神经科学》杂志上。

研究人员开发了具有高空间分辨率的超高场7T功能磁共振成像方法，用于绘制猴子清醒时眼窝视觉皮层的功能图。在腹侧通路（V1-V4视觉区域和后下颞皮层）中，研究人员发现了一个小窝点会在每个半球引起一个由多个（八个）窝点表征组成的环。

这个环围绕着一个被称为 “眼窝核心 ”的区域，该区域由对精细刺激和高空间频率敏感的毫米级功能结构域组成，与眼窝视觉敏锐度、颜色和消色差信息以及运动相一致。因此，这种对中央视觉的精心再现，加上以前未知的眼窝核心区域，标志着灵长类动物眼窝行为的皮层特化。

研究人员表示，在人类和非人灵长类动物中，视线中央1°的区域由眼窝处理，眼窝是一个由高密度光感受器组成的视网膜结构，对于灵长类动物特有的高敏锐度视觉、色觉和凝视视觉注意力至关重要。

附：英文原文

Title: Multiple loci for foveolar vision in macaque monkey visual cortex

Author: Qian, Meizhen, Wang, Jianbao, Gao, Yang, Chen, Ming, Liu, Yin, Zhou, Dengfeng, Lu, Haidong D., Zhang, Xiaotong, Hu, Jia Ming, Roe, Anna Wang

Issue&Volume: 2024-12-05

Abstract: In humans and nonhuman primates, the central 1° of vision is processed by the foveola, a retinal structure that comprises a high density of photoreceptors and is crucial for primate-specific high-acuity vision, color vision and gaze-directed visual attention. Here, we developed high-spatial-resolution ultrahigh-field 7T functional magnetic resonance imaging methods for functional mapping of the foveolar visual cortex in awake monkeys. In the ventral pathway (visual areas V1–V4 and the posterior inferior temporal cortex), viewing of a small foveolar spot elicits a ring of multiple (eight) foveolar representations per hemisphere. This ring surrounds an area called the ‘foveolar core’, which is populated by millimeter-scale functional domains sensitive to fine stimuli and high spatial frequencies, consistent with foveolar visual acuity, color and achromatic information and motion. Thus, this elaborate rerepresentation of central vision coupled with a previously unknown foveolar core area signifies a cortical specialization for primate foveation behaviors.

DOI: 10.1038/s41593-024-01810-4

Source: https://www.nature.com/articles/s41593-024-01810-4