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相关概念视频

Color Vision01:24

Color Vision

578
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
578
Vision01:24

Vision

53.3K
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.
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相关实验视频

Updated: Jul 3, 2025

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

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在子初级视觉皮层中的动态色记忆和预期效应.

Yang Yiling1, Johanna Klon-Lipok2, Katharine Shapcott1

  • 1Ernst Strüngmann Institute for Neuroscience in Cooperation with Max Planck Society, Frankfurt am Main 60528, Germany.

Proceedings of the National Academy of Sciences of the United States of America
|February 14, 2024
PubMed
概括
此摘要是机器生成的。

子中的初级视觉皮层 (V1) 活动显示了视觉工作记忆 (WM) 刺激的消失痕迹. 这个痕迹不需要注意,这表明V1并不积极参与维护WM内容.

关键词:
预期效应是指预期的影响.神经动力学 神经动力学非人类灵长类动物.主要视觉皮层 (V1) 是主要的视觉皮层.工作记忆 工作记忆

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
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相关实验视频

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科学领域:

  • 神经科学是一个神经科学.
  • 认知神经科学 认知神经科学
  • 视觉处理 视觉处理

背景情况:

  • 工作记忆 (WM) 对于认知任务至关重要.
  • 主要视觉皮层 (V1) 在维护WM中的作用是有争议的.
  • 了解V1对WM的贡献可以阐明记忆的神经机制.

研究的目的:

  • 研究主要视觉皮层 (V1) 在工作记忆 (WM) 中的参与.
  • 为了确定V1是否在延迟期间在维护WM内容方面发挥了积极作用.
  • 检查V1人口活动与刺激预期和预测编码的关系.

主要方法:

  • 在monkey V1.1中对多个单元活动的并行多站点记录.
  • 子执行了一个延迟匹配到样本 (DMS) 任务.
  • 在延迟和测试期间分析V1种群发射速度向量.

主要成果:

  • 在延迟期间,V1人口活动保持了样本刺激的消失痕迹.
  • 这种痕迹可以通过冲动刺激重新激活,从而增强神经元的发射.
  • 对测试刺激的V1反应由概率性刺激突发事件调节,对预期刺激的反应减少.

结论:

  • 在V1中消失的痕迹表明内在的网络动态,而不是积极的,依赖于注意力的WM维护.
  • 在WM维护中V1的参与很可能是被动的,反映了刺激史.
  • V1反应与预测编码原理保持一致,对预期刺激的反应减少.