関連する実験動画
Updated: Jul 15, 2026

13:51
Cross-Modal Multivariate Pattern Analysis
Published on: November 9, 2011
視覚属性の自発的に出現する皮質表現です.
Tal Kenet1, Dmitri Bibitchkov, Misha Tsodyks
1Department of Neurobiology, The Weizmann Institute of Science, Rehovot 76100, Israel. (tal@phy.ucsf.edu
Nature
|October 31, 2003
まとめ
進行中の脳活動,または自発的な皮質活動では,視覚的方向図に似た状態を動的に切り替えます. これは,これらの状態が脳の内部的な文脈を表し,知覚と行動に影響を与える可能性があることを示唆しています.
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
- 視覚神経科学とは
背景:
- 皮質の自発的な活動は,神経の発達と感覚処理に不可欠です.
- 刺激によって引き起こされる活動を調節し,行動と相関する.
- 外部情報を処理する進行中の活動の正確な役割と,内部感覚表現との関係は不明である.
研究 の 目的:
- 視覚皮質における自発的な皮質活動の役割を調査する.
- 進行中の活動が,感覚属性の内部表現と関連しているかどうかを判断する.
- 皮質状態のダイナミックな性質を探求するために.
主な方法:
- 麻酔した猫の電圧感受性染色画像を用いた.
- 視覚野の進行中の活動を記録します.
- 自発的な活動とオリエンテーションマップの関係を分析した.
主要な成果:
- 自発的な活動中に動的に切り替わる皮質状態を特定した.
- これらの状態の多くが,オリエンテーションマップと密接に対応していることが観察されました.
- 発現するオリエンテーション状態が複数のハイパーコラムにわたって広がり,その後に近接方向の状態がしばしば続くことを発見した.
結論:
- 動的に切り替わる皮質状態は,脳の内部的な文脈を表す可能性があります.
- これらの状態は,記憶,知覚,および行動を反映または影響する可能性があります.
- 皮質の自発的な活動は,神経表現の組織化において重要な役割を果たします.
関連する概念動画
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.
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.
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.
Association Areas of the Cortex
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Somatosensory, Motor, and Association Cortex
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
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...
Once through the pupil, the light passes through the lens, a...
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...
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...

