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関連する概念動画

The Retina01:32

The Retina

56.6K
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
56.6K
Vision01:24

Vision

48.6K
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.
48.6K
Neurons as Communicators of the Brain01:22

Neurons as Communicators of the Brain

5.2K
Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
5.2K
Organization of the Brain01:30

Organization of the Brain

3.8K
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...
3.8K
Cerebral Hemispheres01:05

Cerebral Hemispheres

3.8K
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...
3.8K
Visual System01:26

Visual System

2.3K
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...
2.3K

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Updated: May 5, 2026

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
11:30

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection

Published on: August 26, 2011

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人間の脳のイメージニューロン.

G Kreiman1, C Koch, I Fried

  • 1Computation and Neural Systems Program, California Institute of Technology, Pasadena 91125, USA.

Nature
|December 1, 2000
PubMed
まとめ

科学者は,人間の脳の同じニューロンが,イメージを見たり,イメージを想像したりすることを処理することを発見しました. これは,視覚的知覚と視覚的記憶のための共有の神経的基礎を示唆しています.

科学分野:

  • 神経科学は神経科学である.
  • コグニティブ・サイエンス コグニティブ・サイエンス
  • 心理学 心理学とは

背景:

  • 視覚的イメージとして知られる鮮明な視覚的イメージを自発的に生成する能力は,一般的な人間の経験です.
  • 視覚的イメージの基礎にある神経機構と,視覚的知覚との関係は,神経科学における長年の議論となっています.
  • さまざまな方法による以前の証拠は,共通の神経過程を示唆したが,一部の患者研究では,異なるメカニズムを示唆した.

研究 の 目的:

  • ヒトの視覚的記憶と関連した単一のニューロンの活動を直接調査する.
  • 視覚的イメージのニューロン基板が視覚的知覚のニューロン基板と重なり合っているかどうかを判断する.

主な方法:

  • ヒトの中間側頭葉 (海馬,桃体,腸内皮質,パラヒポキャンパスの回路を含む) の単一の神経の活動を記録する.
  • 被験者に以前見た画像を想像するよう求められ,ニューロンの発火速度が監視された.

主要な成果:

  • 視覚画像の撮影中に発射速度を選択的に変化させる,中央側側頭葉の単一のニューロンを特定した.
  • 視覚とイメージの両方において選択的な発火を示すニューロンの大多数 (88%) が,同一の選択性パターンを示すことが判明しました.
  • ヒトにおける意志的視覚イメージの特定のニューロンの相関性を実証した.

さらに関連する動画

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

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High-resolution Structural Magnetic Resonance Imaging of the Human Subcortex In Vivo and Postmortem
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High-resolution Structural Magnetic Resonance Imaging of the Human Subcortex In Vivo and Postmortem

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関連する実験動画

Last Updated: May 5, 2026

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
11:30

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection

Published on: August 26, 2011

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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

Published on: June 3, 2013

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High-resolution Structural Magnetic Resonance Imaging of the Human Subcortex In Vivo and Postmortem
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High-resolution Structural Magnetic Resonance Imaging of the Human Subcortex In Vivo and Postmortem

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結論:

  • この研究は,ヒトにおける視覚的イメージの単一のニューロン相関に対する直接的な証拠を提供します.
  • 入ってくる視覚情報の処理と視覚記憶のリコールの両方に共通のニューラル基板を示唆します.
  • 認識と想像力を統合する中間側頭葉の役割を強調する.