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相关概念视频

Neurulation01:30

Neurulation

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Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
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Neuroplasticity01:01

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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Unrenewable Cells00:50

Unrenewable Cells

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In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
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相关实验视频

Updated: Jul 2, 2025

Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
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发育中的皮质在功能上是多能性的:来自失明的证据.

Elizabeth J Saccone1, Mengyu Tian2, Marina Bedny1

  • 1Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD, USA.

Developmental cognitive neuroscience
|February 23, 2024
PubMed
概括
此摘要是机器生成的。

在盲人中,视觉皮层与更高的认知网络相结合,表现出由天生的架构和早期经验所限制的功能可塑性. 这表明大脑发育根据连接和环境输入而适应.

关键词:
大脑发育 大脑发育大脑功能 大脑功能遗传性失明是一种先天性失明.域名特定性 域名特定性神经可塑性 神经可塑性感官损失是一种感官损失.

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科学领域:

  • 神经科学是一个神经科学.
  • 发育神经科学的发展神经科学.
  • 认知神经科学 认知神经科学

背景情况:

  • 发育中的皮质的功能是由天生的架构和早期经验塑造的.
  • 了解失明中的跨模态可塑性为皮层灵活性提供了洞察力.

研究的目的:

  • 审查和综合有关出生失明个体视觉皮层功能的证据.
  • 为了确定视觉皮层在盲人和有视力的人群中是否具有相似或不同的功能.
  • 提出一种由连接性和经验所限制的功能发展模式.

主要方法:

  • 关于视觉皮层在失明中的功能现有文献的审查.
  • 综合有关跨模态和元模态可塑性的证据.
  • 对盲人和有视力的个人进行功能成像研究的分析.

主要成果:

  • 盲人脑后皮层在听觉和触觉任务中是活跃的.
  • 证据支持视觉网络在失明中的急剧重新定位 (更高的认知功能) 和功能相似性 (元模式账户).
  • 失明中的视觉皮层被纳入更高认知网络,接收远程输入.

结论:

  • 皮层的功能发展受到先天的解剖连接性限制,并由经验塑造.
  • "连接受约束的经验依赖"解释了相似的解剖学约束如何产生不同的功能结果.
  • 婴儿皮层发育是多能的,在结构边界内适应可用的感官输入.