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関連する概念動画

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
Indirect Motor Pathways01:22

Indirect Motor Pathways

3.4K
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...
3.4K
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

8.6K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
8.6K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

8.5K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
8.5K
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
Parallel Processing01:20

Parallel Processing

950
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...
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関連する実験動画

Updated: May 5, 2026

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

Published on: August 1, 2018

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視覚的なオブジェクト追跡の適応制御のための専門の並列経路.

Matthew F Collie1, Chennan Jin1, Victoria Rockwell1

  • 1Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.

Neuron
|February 19, 2026
PubMed
まとめ

ドロソフィラの追跡システムは,適応制御のための2つの並列の経路を使用し,物体の位置と速度に基づいて柔軟にステアリングの増幅を調整します. これは,特殊な感覚運動経路が,洗練された視覚追跡をどのように可能にするかを強調しています.

キーワード:
攻撃性 攻撃性 攻撃性覚醒を誘発する.行動状態 行動状態追いかける 追いかける求愛 求愛 求愛 求愛方向の選択性についてフィードバック・コントロール・フィードバックコントロール固定装置を固定する.gain スケジューリングin vivo 電気生理学について

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Using Looming Visual Stimuli to Evaluate Mouse Vision
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Using Looming Visual Stimuli to Evaluate Mouse Vision

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A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
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A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

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関連する実験動画

Last Updated: May 5, 2026

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

Published on: August 1, 2018

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Using Looming Visual Stimuli to Evaluate Mouse Vision
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Using Looming Visual Stimuli to Evaluate Mouse Vision

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科学分野:

  • 神経科学は神経科学である.
  • システム神経科学 システム神経科学
  • 動物の行動 動物の行動

背景:

  • 脳は,視覚的オブジェクトを,追跡のために視覚野の中心に継続的に誘導しなければなりません.
  • 視覚的追跡における適応制御の生物学的メカニズムは完全に理解されていません.

研究 の 目的:

  • ドロソフィラの追跡システムにおける適応制御の基礎となる生物学的メカニズムを調査する.
  • 平行感覚運動経路が柔軟な視覚追跡にどのように貢献するか解明する.

主な方法:

  • ドロソフィラの追跡システムを研究した.
  • 視覚的なオブジェクト追跡に関わる2つの並列の経路を特定しました.
  • 異なる行動状態におけるこれらの経路の柔軟性と採用を分析した.

主要な成果:

  • ドロソフィラの追跡システムは,2つの平行経路を使用しています: 1つは周辺のオブジェクトの方向付け,もう1つは中央のオブジェクトの方向付けと速度増加です.
  • 中央経路は柔軟なゲインコントロールを備えており,物体がミドルラインから離れるとき,またはフライが速く走るとき,ゲインが増加します.
  • この柔軟な経路は,興奮時に優先的に活性化されます.

結論:

  • 視覚的追跡における適応制御は,異なる性質を持つ並列の感覚運動経路の統合から生じる.
  • 特殊な経路は,柔軟で文脈に依存する調整をステアリング行動で可能にします.
  • 発見は,適応的運動制御のニューラル基盤についての洞察を提供します.