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関連する概念動画

Determination01:51

Determination

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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
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Vision01:24

Vision

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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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Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Motor and Sensory Areas of the Cortex01:14

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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....
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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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Cellular Differentiation00:57

Cellular Differentiation

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How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
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Updated: Oct 5, 2025

2D and 3D Human Induced Pluripotent Stem Cell-Based Models to Dissect Primary Cilium Involvement during Neocortical Development
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発達中の皮質の細胞タイプと機能の視力依存の仕様

Sarah Cheng1, Salwan Butrus2, Liming Tan3

  • 1Department of Biological Chemistry, Howard Hughes Medical Institute, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Ophthalmology, Stein Eye Institute, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA.

Cell
|January 22, 2022
PubMed
まとめ
この要約は機械生成です。

視覚はマウスの視覚皮質 (V1) の上層にある特定の脳細胞のタイプを形作る. この経験に依存した発達は 遺伝子発現に依存し 神経細胞の接続と機能に影響します

キーワード:
双眼視細胞タイプ臨界期阻害性シナプス層2/3単核RNA-seq視覚皮質

さらに関連する動画

Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
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Live Imaging of Primary Cerebral Cortex Cells Using a 2D Culture System

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関連する実験動画

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Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
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Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex

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Live Imaging of Primary Cerebral Cortex Cells Using a 2D Culture System
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科学分野:

  • 神経科学
  • 発達生物学
  • 遺伝学

背景:

  • 産後経験は脳の発達,特に皮質の回路に大きな影響を与えます.
  • 感覚インプットに反応する細胞タイプ特有の発達経路を理解することは依然として課題です.

研究 の 目的:

  • マウスの主視野皮質 (V1) の異なる細胞タイプに視覚的経験がどのように形を与えるかを調査する.
  • 経験に依存する回路の精錬の基礎となる分子機構を特定する.

主な方法:

  • 単核RNAの配列は 細胞の種類を特定する
  • 視覚的欠乏と 遺伝的操作によって 経験による変化が評価される
  • 神経反応を評価する機能的イメージング

主要な成果:

  • 視力は,上層層 (L2/3/4) のグルタマタージック細胞の種類を選択的に決定する.
  • 眼を開く前に,より深い層のグルタマタージック,GABAergic,および非ニューロン細胞タイプが確立されます.
  • Igsf9bを含む経験依存遺伝子発現は,L2/ 3における細胞結合とシナプス形成を調節する.
  • Igsf9bはL2/ 3における正常な双眼応答の発達に不可欠である.

結論:

  • 視覚的インプットは,上層のグルタマタージック細胞の発達を優先的に制御する.
  • 細胞型特異的な遺伝子発現プログラムは,視覚経験に依存した皮質発達の主要な媒介者である.