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関連する概念動画

Vision01:24

Vision

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.
Visual System01:26

Visual System

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...
Color Vision01:24

Color Vision

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.
Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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.

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関連する実験動画

Updated: Jul 1, 2026

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

無監督の自然体験は,視覚皮質における不変のオブジェクト表現を急速に変化させます.

Nuo Li1, James J DiCarlo

  • 1McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Science (New York, N.Y.)
|September 13, 2008
PubMed
まとめ

無監督の時限遅延学習 (UTL) は,下側側頭葉皮質 (IT) のニューロンが物体を認識する方法を変化させます. この学習メカニズムは,位置,スケール,ポーズの変化に耐えるオブジェクト表現を構築するのに役立ちます.

科学分野:

  • 神経科学は神経科学である.
  • 計算神経科学とは
  • コンピュータビジョン コンピュータビジョン

背景:

  • オブジェクト認識は,単一のオブジェクトのための網膜画像の変動性のために複雑です.
  • 下側側頭葉皮質 (IT) のニューロンは,物体の選択性を示すが,位置,スケール,姿の変化には不変である.
  • このオブジェクト表現の許容性に基づく神経機構は,ほとんど不明のままである.

研究 の 目的:

  • 脳がオブジェクト認識のためのニューロン耐性をどのように構築するのかを調査する.
  • インヴァリアントオブジェクト表現を開発する際の,無監督タイムラーニング (UTL) の役割を調査する.

主な方法:

  • 被験者が経験する視覚的インプットの時間的な連続性をターゲットに操作する.
  • 下側側頭葉皮質 (IT) からのニューロン応答を記録し,位置耐性の変化を評価する.
  • 時間の経過とともにニューロンの応答に対する無監督の時間的遅い学習 (UTL) の影響を定量化.

主要な成果:

  • 視覚体験のタイムコンティギュイティの変化は,ITニューロンの位置許容性に重大な変化をもたらした.
  • 無監督の時間的な遅い学習 (UTL) は実質的であり,累積的な経験とともに増加しました.

さらに関連する動画

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

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms
07:31

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms

Published on: February 8, 2019

関連する実験動画

Last Updated: Jul 1, 2026

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

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

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms
07:31

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms

Published on: February 8, 2019

  • ITニューロン耐性における有意な変化は,UTLのわずか1時間後に観察されました.

    • 結論:

    • 監視されていない時的遅延学習 (UTL) は,視覚ストリームで寛容なオブジェクト表現を構築し,維持するための潜在的なメカニズムです.
    • この学習プロセスは,脳が物体認識における不変性をどのように達成するかを説明するかもしれない.
    • 発見は理論的モデルと人間の物体知覚の研究と一致し,統一された計算原理を示唆しています.