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関連する概念動画

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

4.1K
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....
4.1K
Vision01:24

Vision

53.7K
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

596
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...
596
Visual System01:26

Visual System

630
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...
630
Association Areas of the Cortex01:21

Association Areas of the Cortex

5.6K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Feedback Inhibition00:46

Feedback Inhibition

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Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
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Updated: Jul 31, 2025

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity
10:05

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity

Published on: May 7, 2017

12.3K

皮質と皮質のフィードバックは,視覚皮質の活発なデンドライトを巻き込みます.

Mehmet Fişek1, Dustin Herrmann2, Alexander Egea-Weiss2

  • 1Wolfson Institute for Biomedical Research and Department of Neuroscience, Physiology and Pharmacology, University College London, London, UK. fisekm@gmail.com.

Nature
|May 3, 2023
PubMed
まとめ
この要約は機械生成です。

主要視野皮質への高視野領域からのネオコルチカルフィードバックは空間的に組織されています. このフィードバックは,空間的にオフセットされ,デンドライトで非線形に統合することで,知覚を容易にする.

さらに関連する動画

Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus
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Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus

Published on: September 20, 2024

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

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関連する実験動画

Last Updated: Jul 31, 2025

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity
10:05

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity

Published on: May 7, 2017

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Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus
05:01

Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus

Published on: September 20, 2024

454
Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

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科学分野:

  • 神経科学
  • 視覚野の研究
  • 皮質回路

背景:

  • 感覚処理は新皮質のフィードバック経路に依存しています
  • フィードバックは文脈的な情報を提供し,知覚を助けますが,そのメカニズムは十分に理解されていません.

研究 の 目的:

  • 側中視野 (LM) から主視野皮質 (V1) へのフィードバックの影響の回路と細胞機構を調査する.
  • 空間的に組織されたフィードバックが視覚的知覚にどのように貢献するのかを理解する.

主な方法:

  • マウスの長距離全光学接続マッピング
  • V1ピラミッドニューロンの 2フォトンのカルシウム画像
  • LMニューロンを活性化する 2光子の光遺伝学です

主要な成果:

  • LMからV1へのフィードバックは空間的に編成されています. 整列すると抑制され,視覚空間でオフセットすると促進されます.
  • 促進フィードバックは,V1ピラミッドニューロンのアピカルタフトデンドライトに非線形に統合されています.
  • LMニューロンを刺激してV1に投射すると, 枝に特異的な dendritic カルシウム信号が発せられます.

結論:

  • 新皮質のフィードバック接続は空間的に組織され,文脈的な相互作用で役割を果たします.
  • フィードバックの非線形 dendritic 統合は予測的および協力的知覚機能をサポートします.