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関連する概念動画

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....
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Somatosensory, Motor, and Association Cortex01:24

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...
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Indirect Motor Pathways01:22

Indirect Motor Pathways

1.7K
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...
1.7K
Direct Motor Pathways01:11

Direct Motor Pathways

2.4K
The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and...
2.4K
Somatosensation01:33

Somatosensation

38.4K
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.
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Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

1.2K
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
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Updated: Sep 9, 2025

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

Published on: September 11, 2017

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主要な運動皮質の姿勢サブスペース

Patrick J Marino1, Lindsay Bahureksa2, Carmen Fernández Fisac2

  • 1Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15260, USA; Center for the Neural Basis of Cognition, Pittsburgh, PA 15213, USA.

Neuron
|August 28, 2025
PubMed
まとめ
この要約は機械生成です。

脳は運動の目標と身体の姿勢を運動皮質 (M1) で組み合わせる. 研究者達は これらの信号が 独立した正交の神経空間に 編成されていることを発見し 柔軟な行動生成を可能にしました

キーワード:
脳とコンピュータのインターフェース脳と機械のインターフェース次元縮小運動皮質ニューラル集団の動態姿勢自己受容センサー・モーター統合

さらに関連する動画

Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS
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Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS

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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

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関連する実験動画

Last Updated: Sep 9, 2025

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
09:48

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

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Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS
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Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS

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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Published on: February 23, 2020

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科学分野:

  • 神経科学
  • モーター コントロール
  • 計算神経科学

背景:

  • 脳は動きの目標と 身体の姿勢の情報を統合して 行動を起こすのです
  • 主要な運動皮質 (M1) は,この統合のための重要な脳の領域です.
  • M1がこれらのシグナルをどのように組織するかを理解することは,柔軟な運動制御を説明する鍵です.

研究 の 目的:

  • 主要運動皮質 (M1) 内の姿勢と運動の目標信号の組織を調査する.
  • M1アクティビティが,さまざまな身体姿勢で,どのように柔軟に動作コマンドを生成するかを決定する.

主な方法:

  • 猿の原発運動皮質 (M1) の神経活動が記録された.
  • 猿は様々な姿勢で 前腕の動きを含む様々な作業を行いました
  • 姿勢と目標に関連する要素を特定するために神経集団の活動を分析した.

主要な成果:

  • 姿勢と目標の信号は,M1ニューラル集団の活動内で分離可能であることが判明した.
  • これらの信号はほぼ直角のサブスペースを占め, 明確な組織原理を示しています.
  • M1における姿勢信号の組織は,異なるタスクにおいて安定していた.
  • 特定の運動目標のための 神経軌跡は 各タスク内の様々な姿勢で 類似した形状を示しました

結論:

  • M1は,これまで理解していたよりも,より単純な姿勢信号の組織を示しています.
  • M1における姿勢とゴールシグナルの区切りは,それらの柔軟な組み合わせを容易にする.
  • この組織は 脳の様々な行動を生み出す能力を 支えています