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Organization of the Brain01:30

Organization of the Brain

The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Cerebral Hemispheres01:05

Cerebral Hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
Somatosensory, Motor, and Association Cortex01:23

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...
Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
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...
High-Level and Low-Level Awareness01:19

High-Level and Low-Level Awareness

Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...

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関連する実験動画

Updated: Jun 9, 2026

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
11:15

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

Published on: February 21, 2014

人間の脳における側面化された認知プロセスと側面化されたタスク制御.

Klaas E Stephan1, John C Marshall, Karl J Friston

  • 1Institute of Medicine (IME), Research Centre Jülich, 52425 Jülich, Germany.

Science (New York, N.Y.)
|July 19, 2003
PubMed
まとめ
この要約は機械生成です。

人間の脳の横行化は,刺激ではなく,タスクのタイプに依存します. 前帯状皮質 (ACC) のような認知制御領域は,実行中のタスクと同じ半球で活性化します.

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Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
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Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex

Published on: April 15, 2015

High-definition Transcranial Direct Current Stimulation over Right Dorsolateral Prefrontal Cortex to Enhance Metacognitive Sensitivity
06:11

High-definition Transcranial Direct Current Stimulation over Right Dorsolateral Prefrontal Cortex to Enhance Metacognitive Sensitivity

Published on: September 26, 2025

関連する実験動画

Last Updated: Jun 9, 2026

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
11:15

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

Published on: February 21, 2014

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
09:00

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex

Published on: April 15, 2015

High-definition Transcranial Direct Current Stimulation over Right Dorsolateral Prefrontal Cortex to Enhance Metacognitive Sensitivity
06:11

High-definition Transcranial Direct Current Stimulation over Right Dorsolateral Prefrontal Cortex to Enhance Metacognitive Sensitivity

Published on: September 26, 2025

科学分野:

  • 神経科学は神経科学である.
  • 認知心理学とは,認知心理学である.
  • 脳のイメージング

背景:

  • 人間の脳機能は半球的な専門性を示しているが,その基礎となる原理は不明である.
  • 脳がどのように情報を処理し,認知制御を行なうかを理解することは,神経科学にとって極めて重要です.

研究 の 目的:

  • 半球の専門化を促す要因を調査する.
  • 課題の性質か,刺激の種類が脳側向化を決定するかどうかを判断する.
  • 課題の実行における認知制御領域の役割を検証する.

主な方法:

  • 機能的磁気共鳴画像 (fMRI) を利用して,脳の活動を観察しました.
  • 文字と視覚空間の両方の意思決定タスクに同一の単語刺激を使用しました.
  • 脳の領域,特に前帯状皮質 (ACC) の間の機能的な接続性を分析しました.

主要な成果:

  • 半球の専門化は,提示された刺激ではなく,実行されたタスクに依存していることが判明しました.
  • 左前帯状皮質 (ACC) と左下側前頭回 (LFG) の結合が増加したのは,手紙の決定の際に起こりました.
  • 視覚空間的決定の際に,右側ACCと右側頭部領域の結合が強化されたことが観察されました.

結論:

  • 認知制御メカニズムは,特定のタスクの実行を担当する脳の同じ半球内に局所されています.
  • タスク依存の横行化は,人間の脳の機能的組織についての洞察を提供します.