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相关概念视频

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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相关实验视频

Updated: May 28, 2025

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

Published on: December 2, 2022

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复杂的大脑的狭窄路径

Giacomo Gattoni1, Maria Antonietta Tosches1

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

Science (New York, N.Y.)
|February 13, 2025
PubMed
概括
此摘要是机器生成的。

鸟类和哺乳动物之间的神经发育和大脑电路的演变显示出惊人的趋同. 这表明共同的发育机制塑造了远距离相关物种的复杂大脑结构.

更多相关视频

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

Published on: February 15, 2021

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相关实验视频

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
05:55

Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

979
Microdissection of Mouse Brain into Functionally and Anatomically Different Regions
08:06

Microdissection of Mouse Brain into Functionally and Anatomically Different Regions

Published on: February 15, 2021

44.6K

科学领域:

  • 神经科学
  • 进化生物学
  • 比较解剖学

背景情况:

  • 了解复杂的大脑结构的演变对于破译认知能力至关重要.
  • 鸟类和哺乳动物, 尽管有不同的进化路径, 在大脑组织方面表现出了显著的相似性.

研究的目的:

  • 研究鸟类和哺乳动物神经发育和大脑电路的融合进化.
  • 确定脑部复杂性的共同分子和发育机制.

主要方法:

  • 关键神经发育基因的比较基因组分析.
  • 大脑结构的组织学和神经解剖学比较.
  • 两组模型生物的发育路径分析.

主要成果:

  • 有证据表明聚变的分子途径调节神经发生和神经元迁移.
  • 类似的基因表达模式在同类的大脑区域.
  • 传感处理和运动控制电路的功能相似性.

结论:

  • 在鸟类和哺乳动物中, 神经发育和大脑电路的演变都趋同.
  • 共同的发育原理有助于复杂的大脑的独立进化.
  • 这种趋同提供了对大脑进化的基本限制和可能性的见解.