在小鼠和子的视觉皮层中编码发光表面:对边缘和中心的反应的差异
Shany Nivinsky Margalit1, Hamutal Slovin1
1The Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan 5290002, Israel.
Cerebral cortex (New York, N.Y. : 1991)
|April 23, 2024
概括
在初级视觉皮层 (V1) 中,小鼠和子之间的表面神经处理不同 (V1). 与格相比,这两种物种对表面的反应都被抑制了,这表明它们有共同的视觉处理机制.
科学领域:
- 神经科学是一个神经科学.
- 相对视觉视觉比较
- 视觉皮层 视觉皮层
背景情况:
- 亮度和空间对比度对于感知物体表面和边缘至关重要.
- 初级视觉皮层 (V1) 是第一个处理视觉信息的皮层区域.
- 视觉敏度的差异 (例如,灵长类动物中的形存在与小鼠中的缺席) 引发了关于表面处理的共享神经机制的问题.
研究的目的:
- 研究和比较神经群体对小鼠和子初级视觉皮层 (V1) 中的亮度表面的反应.
- 为了确定处理表面的神经机制是否在具有不同视觉系统的物种中得到保护.
- 为了阐明V1对均表面的反应的空间模式.
主要方法:
- 电压敏感染料成像被用于测量人口神经反应在V1.
- 高空间和时间分辨率成像捕捉了神经活动.
- 给小鼠和子提供了黑白表面刺激.
主要成果:
- 在小鼠中,对表面的V1反应不是边缘主导,而是倾向于中心主导.
- 在子中,对表面的V1反应是边缘主导的,在响应模式中有一个中心"洞".
- 与格子刺激相比,这两种物种都表现出对表面的反应抑制.
结论:
- 在小鼠和子之间,V1种群对亮度表面的响应空间模式存在显著差异.
- 在两种物种中都观察到相对于格子刺激的共同的神经抑制机制.
- 这些发现突出了物种特异性适应和早期视觉皮层处理中保存的原则.
更多相关视频
07:08Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
Published on: August 1, 2018
8.3K
08:42Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
Published on: August 4, 2018
14.1K
相关概念视频
01:20Anatomy of the Eyeball
7.1K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.1K
01:24Vision
53.2K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
53.2K