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関連する概念動画

Vision01:24

Vision

48.7K
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.
48.7K
Visual System01:26

Visual System

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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
Color Vision01:24

Color Vision

2.0K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
2.0K
System of Memory01:23

System of Memory

9.8K
Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
9.8K
Sensory Memory01:14

Sensory Memory

1.0K
Sensory memory captures information from the environment in its original form for a very brief duration, just long enough to be exposed to visual, auditory, and other senses. This type of memory is detailed and rich but quickly lost unless certain strategies are employed to transfer it into short-term or long-term memory. Sensory information is continuously bombarding the human brain, yet only a small fraction is absorbed, as most of it does not significantly impact daily life. For instance,...
1.0K
Storage01:23

Storage

541
A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Eye Movement Monitoring of Memory
08:06

Eye Movement Monitoring of Memory

Published on: August 16, 2010

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オブジェクトの視覚的短期記憶をサポートする解離性神経機構.

Yaoda Xu1, Marvin M Chun

  • 1Department of Psychology, Yale University, New Haven, Connecticut 06520-8205, USA. yaoda.xu@yale.edu

Nature
|December 31, 2005
PubMed
まとめ
この要約は機械生成です。

視覚短期記憶 (VSTM) の容量は固定されていません. parietal と occipital cortices を含む異なる脳領域は,特定の記憶機構に貢献し,あるものは固定され,他のものはオブジェクトの複雑さに基づいて変動します.

さらに関連する動画

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

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関連する実験動画

Last Updated: May 6, 2026

Eye Movement Monitoring of Memory
08:06

Eye Movement Monitoring of Memory

Published on: August 16, 2010

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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

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Simultaneous Eye Tracking and Single-Neuron Recordings in Human Epilepsy Patients
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科学分野:

  • 神経科学は神経科学である.
  • 認知心理学とは,認知心理学である.
  • 視覚的知覚 視覚的知覚

背景:

  • 視覚的短期記憶 (VSTM) は,視覚的な情報を保持することによって,行動の誘導に不可欠です.
  • 重要な議論は,VSTMの容量が固定された数の項目か,または変動する容量であるかどうかです.
  • VSTM能力のニューラル基盤を理解することは,認知神経科学にとって不可欠です.

研究 の 目的:

  • 固定対変数VSTM容量に関する論争を解決するために.
  • VSTMにおける parietal と occipital 皮質の表現能力を分離する.
  • VSTMのエンコーディングとメンテナンスをサポートするニューラルメカニズムを調査する.

主な方法:

  • 機能的磁気共鳴画像 (fMRI) を利用した4つの実験.
  • 下部イントラペリエタルシルカス (IPS),上部IPS,横部頭複合体における神経表現の分析.
  • VSTMのエンコーディングとメンテナンス段階の検討.

主要な成果:

  • 下位のIPSは固定容量で,複雑さに関係なく約4つのオブジェクトを保存することが示されました.
  • 上部IPSと横側頭複合体は,より複雑なオブジェクトを少量に保存する,変数容量を示しました.
  • これらの独特な神経パターンは,VSTMのエンコーディングとメンテナンスの両方で明らかでした.

結論:

  • VSTMの能力は,複数の相互作用する神経システムによってサポートされています.
  • 下位IPSは,空間的に異なるオブジェクトの定数を維持しています.
  • 上部IPSと横側頭複合体は,複雑性に基づいて変数的にオブジェクトをコードし,VSTM全体の容量に寄与します.