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相关概念视频

Vision01:24

Vision

59.3K
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.
59.3K
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

9.4K
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...
9.4K
The Retina01:32

The Retina

74.3K
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
74.3K
Visual System01:26

Visual System

1.7K
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
1.7K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

6.9K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
6.9K

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相关实验视频

Updated: Jan 15, 2026

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

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鼠标视觉皮层对方向和平均亮度的独立编码.

Ronan T O'Shea1,2,3,4, Xue-Xin Wei5,2,3,4, Nicholas J Priebe5,3,4

  • 1Center for Perceptual Systems, The University of Texas at Austin, Austin, Texas, 78712, USA ronan_oshea@utexas.edu.

eNeuro
|January 13, 2026
PubMed
概括

鼠标初级视觉皮层 (V1) 神经元代表空间视觉信息,独立于亮度变化. V1 群体响应也强大地编码了平均发光度,空间和发光度信息沿直角轴编码.

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Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
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Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks

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Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice
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相关实验视频

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

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Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
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科学领域:

  • 神经科学是一个神经科学.
  • 计算神经科学是一种神经科学.
  • 感官处理 感官处理

背景情况:

  • 感官系统通过多个刺激维度编码来自自然环境的行为相关信息.
  • 神经表现必须对环境变化 (如亮度波动) 具有强度,以获得可靠的行为.
  • 鼠标的主要视觉皮层 (V1) 处理视觉场景,包括空间和时间信息.

研究的目的:

  • 调查鼠标V1是否共同表示空间视觉特性和平均亮度变化.
  • 要确定V1神经表示是否与亮度条件不变.
  • 了解多维感官信息如何在V1神经元群体中分布.

主要方法:

  • 两光子成像被用来记录小鼠V1.1的神经群活动.
  • 刺激因其空间特性 (如方向) 和平均发光量而有所不同.
  • 分析的重点是V1人群反应如何编码这些刺激尺寸.

主要成果:

  • V1神经元在不同的亮度条件下不变地编码空间视觉信息.
  • V1 群体响应强有力的表示平均亮度.
  • 刺激方向和平均亮度的变化在神经反应空间的直角轴上编码,表明独立编码.

结论:

  • 鼠标V1实现空间视觉特征和平均亮度的独立编码.
  • 这种独立的表示是通过在V1群体中随机分配刺激信息来促进的.
  • V1展示了一种机制,用于从各种神经元响应特性中新兴的多维感官表示.