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関連する概念動画

Schemas01:42

Schemas

11.5K
A schema is a mental construct consisting of a cluster or collection of related concepts (Bartlett, 1932). There are many different types of schemata, and they all have one thing in common: schemata are a method of organizing information that allows the brain to work more efficiently. When a schema is activated, the brain makes immediate assumptions about the person or object being observed.
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Organization of the Brain01:30

Organization of the Brain

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The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
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Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
287
Direct Motor Pathways01:11

Direct Motor Pathways

1.8K
The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and...
1.8K
Indirect Motor Pathways01:22

Indirect Motor Pathways

1.4K
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
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Anatomy of the Brain: Major Regions01:20

Anatomy of the Brain: Major Regions

3.4K
The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect...
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Utilizing a Reconfigurable Maze System to Enhance the Reproducibility of Spatial Navigation Tests in Rodents
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Utilizing a Reconfigurable Maze System to Enhance the Reproducibility of Spatial Navigation Tests in Rodents

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複雑な脳への狭い道

Giacomo Gattoni1, Maria Antonietta Tosches1

  • 1Department of Biological Sciences, Columbia University, New York, NY, USA.

Science (New York, N.Y.)
|February 13, 2025
PubMed
まとめ
この要約は機械生成です。

神経の発達と脳回路の進化は 鳥と哺乳類の驚くべき収束を示しています これは 共通の発達メカニズムが 遠い親類の種で 複雑な脳構造を形作っていることを示しています

さらに関連する動画

Modeling the Functional Network for Spatial Navigation in the Human Brain
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Modeling the Functional Network for Spatial Navigation in the Human Brain

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Microdissection of Mouse Brain into Functionally and Anatomically Different Regions
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関連する実験動画

Last Updated: May 28, 2025

Utilizing a Reconfigurable Maze System to Enhance the Reproducibility of Spatial Navigation Tests in Rodents
04:41

Utilizing a Reconfigurable Maze System to Enhance the Reproducibility of Spatial Navigation Tests in Rodents

Published on: December 2, 2022

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Modeling the Functional Network for Spatial Navigation in the Human Brain
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Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

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Microdissection of Mouse Brain into Functionally and Anatomically Different Regions
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Microdissection of Mouse Brain into Functionally and Anatomically Different Regions

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科学分野:

  • 神経科学
  • 進化生物学
  • 比較解剖学

背景:

  • 複雑な脳の構造の進化を理解することは 認知能力を解読するのに不可欠です
  • 鳥と哺乳類は 進化の途中で 異なっていますが 脳の組織には 驚くべき類似点があります

研究 の 目的:

  • 鳥類と哺乳類の神経発達と脳回路の収束進化を調査する.
  • 脳の複雑性の基礎にある 分子や発達メカニズムを特定する

主な方法:

  • 神経発達における重要な遺伝子の比較ゲノム分析
  • 脳の構造の組織学的および神経解剖学的比較
  • 両グループのモデル生物における発達経路分析

主要な成果:

  • ニューロゲネシスとニューロン移動を調節する 収束分子経路の証拠
  • 似たような遺伝子発現パターンです
  • センサー処理とモーター制御回路の機能的類似性

結論:

  • 神経の発達と脳回路の進化は 鳥と哺乳類に収束しています
  • 共通の発達原理は 複雑な脳の独立した進化に 貢献します
  • 脳の進化の根本的な制約と可能性に 洞察を与えてくれます