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関連する概念動画

Vision01:24

Vision

61.3K
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.
61.3K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

8.9K
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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Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

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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...
3.9K
Somatosensation01:33

Somatosensation

45.1K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
45.1K
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

9.7K
Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
9.7K
Visual System01:26

Visual System

2.2K
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...
2.2K

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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

27.0K

主要視野皮質における感覚マップトポグラフィーの基礎となる原理

Jens Kremkow1, Jianzhong Jin1, Yushi Wang1

  • 1Graduate Center for Vision Research, State University of New York, College of Optometry, 33 West 42nd Street, New York, New York 10036, USA.

Nature
|April 28, 2016
PubMed
まとめ
この要約は機械生成です。

視覚皮質の地図は,空間位置の地図とリンクされています. この組織は,タラムスの光 (ON) と暗 (OFF) 信号の配置から生じ,視覚的地形学の共通の原理を明らかにします.

さらに関連する動画

Topographical Estimation of Visual Population Receptive Fields by fMRI
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Topographical Estimation of Visual Population Receptive Fields by fMRI

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Revealing Neural Circuit Topography in Multi-Color
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Revealing Neural Circuit Topography in Multi-Color

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関連する実験動画

Last Updated: Mar 22, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

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Topographical Estimation of Visual Population Receptive Fields by fMRI
06:02

Topographical Estimation of Visual Population Receptive Fields by fMRI

Published on: February 3, 2015

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Revealing Neural Circuit Topography in Multi-Color
09:11

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科学分野:

  • 神経科学
  • 視覚システム
  • 皮質マッピング

背景:

  • 主要視野皮質は 位置,眼の優位性,方向性に基づいて 視覚的なシーンを詳細に地図化しています
  • オリエンテーション,方向,網膜の差の地図の起源は完全に理解されていません.
  • 空間的位置と眼の優位性に関する既存の地図は,タラミックアファレント軸索の配置と関連しています.

研究 の 目的:

  • 視覚的皮質マップの基礎となる組織的原理を調査する.
  • 空間位置マップと他の視覚刺激次元マップの関係を決定する.
  • 視覚皮質のトポグラフィにおけるタラミックアファレント組織の役割を明らかにする.

主な方法:

  • 猫 (Felis catus) の視覚皮質の皮質マップの分析
  • タラミックアファレント軸索の空間的配置を調べる
  • オリエンテーション,方向,網膜の格差マップとのオンオフ刺激マップの相関.

主要な成果:

  • オリエンテーション,方向,網膜の格差に関する皮質マップは,光 (ON) と暗 (OFF) の刺激の空間位置マップと密接に関連しています.
  • ON-OFFマップは,OFFが支配する,OFF中心の,そして眼球の支配列に直角である.
  • このON-OFFの組織は,ONとOFFのthalamic afferentsのクラスタリングから発生します.

結論:

  • 視覚皮質のトポグラフィーには 共通の組織原理があります
  • 類似の網膜構造とオン・オフの極性を持つタラミック軸索は,隣接する皮質領域に配置されています.
  • この配列は 方向性や方向性や網膜の不均一性に関する地図の形成を左右します