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関連する概念動画

Vision01:24

Vision

55.3K
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.
55.3K
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

531
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
531
Curvilinear Motion: Rectangular Components01:23

Curvilinear Motion: Rectangular Components

625
Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...
625
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

271
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
271
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

4.6K
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....
4.6K
Perceptual Constancy01:12

Perceptual Constancy

531
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...
531

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Updated: Sep 10, 2025

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

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モーションエクストラポレーション中の時間的予測による主視野皮質の文脈的調節

Camila Silveira Agostino1,2,3, Herman Hinrichs4,5,6, Toemme Noesselt1,4

  • 1Department of Biological Psychology, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany.

Brain and behavior
|August 23, 2025
PubMed
まとめ
この要約は機械生成です。

動きを予測するのは 視覚野の活動に依存し 全体的な予測よりも 最近の経験に 影響を受けます 予測可能性だけでなく 体験歴も 運動抽出作業の時の 脳の反応を形作ります

さらに関連する動画

Cross-Modal Multivariate Pattern Analysis
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Cross-Modal Multivariate Pattern Analysis

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An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles
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関連する実験動画

Last Updated: Sep 10, 2025

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

6.1K
Cross-Modal Multivariate Pattern Analysis
13:51

Cross-Modal Multivariate Pattern Analysis

Published on: November 9, 2011

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An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles
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An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles

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科学分野:

  • 認知神経科学
  • 神経イメージング
  • 視覚的知覚

背景:

  • 将来の出来事を予測することは極めて重要で 環境の予測可能性と結びついています
  • 予測可能な環境と予測不可能な環境における 表面的な運動と視覚野の活動に関する以前の研究は 矛盾する結果をもたらしました
  • 連続運動パラダイムにおける脳の反応に対する時間的予測の影響は不明である.

研究 の 目的:

  • 主要視野皮質におけるfMRI応答を予測可能および予測不能の文脈で運動抽出がどのように調節するかを調査する.
  • 視覚的刺激と部分的に遮断された視覚的刺激の間の脳の活動を,予測可能な状況で調べる.

主な方法:

  • 18人の参加者が 視界と遮断された運動フェーズで 修正された検知作業を完了しました
  • fMRIデータを取得し,参加者は刺激の軌跡と接触点を判断しました.
  • 2つの文脈が使用されました:高い予測可能性 (恒定速度) と低い予測可能性 (変化速度).

主要な成果:

  • 単元分析では,両方の予測状況において,主視野皮質の活性が類似していることが示された.
  • 速度の変化 (試行型) の後のV1におけるBOLD反応の増加を示した.
  • 多変量パターンの分析は,特に予測可能性の低い状況で,一致する試験と不一致する試験の異なるパターンを特定しました.

結論:

  • 運動の抽象化は 視覚野の活動を 平均的な予測性とは無関係に調整します
  • 最近の臨床試験は 運動抽出で脳の反応に 重要な影響を及ぼします
  • 最近の経験に基づいて 運動の予測可能性の変化に 脳が適応することを示唆しています