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相关概念视频

Color Vision01:24

Color Vision

590
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.
590
Synesthesia01:27

Synesthesia

136
Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
136
Vision01:24

Vision

53.5K
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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Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

6.1K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.1K
Perceptual Constancy01:12

Perceptual Constancy

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Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
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Anatomy of the Eyeball01:20

Anatomy of the Eyeball

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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...
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相关实验视频

Updated: Jul 11, 2025

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

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心灵眼中的颜色.

Paolo Bartolomeo1, Jianghao Liu2, Alfredo Spagna3

  • 1Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, Hôpital de la Pitié-Salpêtrière, Paris, France.

Cortex; a journal devoted to the study of the nervous system and behavior
|November 5, 2023
PubMed
概括

这项研究突出了在获得的色素患者中保存的色彩心理图像. 神经成像证实,色彩图像涉及到特定的大脑区域,而不仅仅是视觉感知区域.

关键词:
彩色图像是一种色彩图像.形圆周 (fusiform gyrus) 是一个形圆周.单个案例研究 单个案例研究视觉体验是一种视觉体验.视觉心理图像是一种可视的心理图像.

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Visualizing Visual Adaptation
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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

Published on: August 29, 2018

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相关实验视频

Last Updated: Jul 11, 2025

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Published on: February 20, 2014

22.9K
Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
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科学领域:

  • 认知神经科学 认知神经科学
  • 神经心理学 神经心理学

背景情况:

  • 这是一个很棒的节目,这是一个很棒的节目.
  • 在教堂广场 (Piazza del Duomo) 上.
  • 一篇1978年发表的论文刺激了对脑损伤患者视觉心理图像的研究.
  • 单个案例报告揭示了感知和图像之间的分离,挑战了现有的模型.
  • 这项研究专门研究了色彩心理图像.

研究的目的:

  • 为了检查色彩心理图像在患有获得的色症的患者.
  • 通过在健康个体中使用神经影像来探索色彩图像的神经相关性.
  • 评估特定大脑区域在彩色心理图像中的作用.

主要方法:

  • 一个患有获得性色素和保存色彩图像的患者的案例研究.
  • 在健康参与者中进行神经成像 (fMRI) 研究,以绘制色彩图像激活的地图.
  • 对损伤位置的分析与保留/损伤的功能相关.

主要成果:

  • 一名患有获得性色素的患者表现出完整的色彩图像,尽管视觉色彩缺陷.
  • 神经成像显示,色彩图像激活了左侧状环中的一个域一般区域.
  • 前部,但不是后部,腹部皮质的色彩偏差斑点在彩色成像期间被激活.

结论:

  • 个体神经学案例研究对于推进神经认知研究至关重要.
  • 色彩心理图像依赖于不同的神经基质,部分重叠,但也与视觉感知分离.
  • 这些发现通过明确不同大脑区域的作用来完善视觉心理图像的模型.