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関連する概念動画

Fischer Projections02:18

Fischer Projections

16.7K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
16.7K
Newman Projections02:06

Newman Projections

21.4K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
21.4K
Coordinates and Map Projections01:29

Coordinates and Map Projections

633
Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
633
Association Areas of the Cortex01:21

Association Areas of the Cortex

9.5K
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,...
9.5K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

7.7K
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....
7.7K
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

2.8K
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...
2.8K

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関連する実験動画

Updated: Feb 12, 2026

Author Spotlight: Deciphering Neural Circuit Formation from Two-Photon Microscopy and Single Neuron Imaging
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Author Spotlight: Deciphering Neural Circuit Formation from Two-Photon Microscopy and Single Neuron Imaging

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視覚皮質からの単細胞投影の論理

Yunyun Han1,2,3, Justus M Kebschull4,5, Robert A A Campbell3

  • 1Department of Neurobiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Nature
|March 29, 2018
PubMed
まとめ

マウスの脳内の個々のニューロンは 複数の領域に広がり 単一標的ニューロン通信という考えに 異議を唱えます この発見は 脳の様々な領域で 複雑な情報を共有することを明らかにし 神経経路の理解に影響を与えます

さらに関連する動画

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
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Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

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Chronic Imaging of Mouse Visual Cortex Using a Thinned-skull Preparation
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Chronic Imaging of Mouse Visual Cortex Using a Thinned-skull Preparation

Published on: October 25, 2010

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関連する実験動画

Last Updated: Feb 12, 2026

Author Spotlight: Deciphering Neural Circuit Formation from Two-Photon Microscopy and Single Neuron Imaging
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Author Spotlight: Deciphering Neural Circuit Formation from Two-Photon Microscopy and Single Neuron Imaging

Published on: November 21, 2023

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Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
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Chronic Imaging of Mouse Visual Cortex Using a Thinned-skull Preparation
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Published on: October 25, 2010

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科学分野:

  • 神経科学
  • システム神経科学
  • 計算神経科学

背景:

  • 新皮質のコミュニケーションは軸索の投影に依存しますが,個々のニューロン投影パターンはほとんど知られていません.
  • 情報の伝達を理解するには ニューロンの標的を体系的に特徴づける必要があります

研究 の 目的:

  • マウスの主視野皮質の個々のニューロンのプロジェクションパターンを体系的にマッピングする.
  • 個々のニューロンが単一か複数の皮質や皮質下部に 発射されているかどうかを判断する.

主な方法:

  • 脳全体の光による軸索追跡を 活用した.
  • 591 個のニューロンに対して,遺伝子的にバーコードされたニューロンの高通量DNAシーケンシング (MAPseq) を採用した.

主要な成果:

  • 少なくとも18の皮質と皮質下部を標的とした 非常に多様で異なった投影を発見した.
  • ほとんどのニューロンが多重な皮質領域に ランダムでない組み合わせで投影されていて 異なるニューロンサブクラスを示唆しています
  • "ニューロン"と"ターゲットエリア"のシステムではないことを示した.

結論:

  • 個々の皮質ニューロンは 標的領域のサブセットで 信号を共有します
  • 神経信号は同時に複数の機能的経路に寄与し 複雑な情報共有モデルを示しています