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相关概念视频

Blinding01:11

Blinding

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Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
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Blind Procedures02:07

Blind Procedures

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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which...
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Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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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,...
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Prosopagnosia01:24

Prosopagnosia

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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Hindsight Biases01:12

Hindsight Biases

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Hindsight bias leads you to believe that the event you just experienced was predictable, even though it really wasn’t. In other words, you knew all along that things would turn out the way they did. Can you relate this to the phrase "Hindsight is 20/20" now? 
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Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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相关实验视频

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A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision
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功能性盲视及其诊断及其诊断

Timothy Joseph Lane1,2,3, Tsan-Hon Liou1,4,5, Yi-Chia Kung6,7

  • 1Graduate Institute of Mind, Brain, and Consciousness, Taipei Medical University, Taipei City, Taiwan.

Frontiers in neurology
|February 22, 2024
PubMed
概括
此摘要是机器生成的。

在皮质盲患者中发现了盲视的功能证据,即使在MRI扫描上没有可检测的条纹病变. 这项研究展示了一种在临床和法医环境中诊断盲视的新方法.

关键词:
在P300300中,P300是最重要的.里多赫综合症 (Riddoch Syndrome) 是一种疾病.这是一种类似的形形.盲目视力 盲目视力 盲目视力意识 意识 意识 意识 意识功能磁力共振成像 (fMRI) 是一种超的挑战 超的挑战自我相关性是一种自我相关性.

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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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A Method for Investigating Change Blindness in Pigeons Columba Livia
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科学领域:

  • 神经科学是一个神经科学.
  • 眼科医生 眼科 眼科
  • 认知心理学 认知心理学

背景情况:

  • 皮质失明可以发生在皮质皮层没有明显的结构损伤的情况下.
  • 盲视,即在没有意识感知的情况下对视觉刺激做出反应的能力,通常与条状皮质病变有关.
  • 诊断失明可能具有挑战性,尤其是在缺乏结构证据的情况下.

研究的目的:

  • 在皮质失明和没有可检测的条纹病变的患者中调查盲视的功能证据.
  • 开发和验证一种与时空任务相关的方法来检测盲视.
  • 探索这种诊断方法的临床,科学和法医应用.

主要方法:

  • 研究了一名患有创伤后皮质失明和残余运动能力的患者 (JK).
  • 一系列专注于时间和空间维度的任务旨在引起盲视的功能证据.
  • 时间空间任务的执行与健康对照进行了对比,结合了详细的主观经验报告.

主要成果:

  • 确定了盲视的令人信服的功能神经证据,与患者的主观报告保持一致.
  • 没有可检测的条纹病变并不排除功能性盲视的存在.
  • 开发的方法在没有结构异常的情况下有效地证明了盲视.

结论:

  • 功能性盲视可以检测到即使没有明显的纹状皮质的结构损伤.
  • 基于空间时间任务的方法为诊断盲视提供了一种可靠的方法.
  • 这种方法对于视觉处理障碍的临床,科学和法医调查具有广泛的适用性.