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関連する概念動画

Somatosensation01:33

Somatosensation

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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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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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Association Areas of the Cortex01:21

Association Areas of the Cortex

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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,...
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Motor and Sensory Areas of the Cortex01:14

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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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Lateralization01:28

Lateralization

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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.
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Olfaction01:25

Olfaction

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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
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Updated: Dec 10, 2025

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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感覚皮質の値誘導再マッピングは,横の軌道前皮質による.

Abhishek Banerjee1,2, Giuseppe Parente3, Jasper Teutsch3,4

  • 1Laboratory of Neural Circuit Dynamics, Brain Research Institute, University of Zurich, Zurich, Switzerland. abhi.banerjee@newcastle.ac.uk.

Nature
|September 5, 2020
PubMed
まとめ

柔軟な意思決定は 軌道前皮質 (OFC) に依存しています この研究は,OFC信号が体感覚皮質 (S1) に予測エラーを表示し,適応的行動と学習を可能にします.

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Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping
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関連する実験動画

Last Updated: Dec 10, 2025

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Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping
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科学分野:

  • 神経科学
  • 認知神経科学
  • 意思決定科学

背景:

  • 適応行動には 柔軟な意思決定が不可欠です
  • 前頭皮質,特に軌道前頭皮質 (OFC) は,哺乳類におけるこのプロセスに不可欠です.
  • OFCが決定変数をどのようにコードし,感覚領域をどのように導くかを理解することは,依然として重要な課題です.

研究 の 目的:

  • 適応的な意思決定の過程で,横側OFCと主体体感覚皮質 (S1) の間のダイナミックな相互作用を調査する.
  • OFCが感覚領域に 行動を指示する神経機構を解明する.
  • 価値に基づく学習と行動の柔軟性における OFC-S1 コミュニケーションの役割を探求する.

主な方法:

  • 頭を固定したマウスの 逆転学習課題を開発しました
  • 2フォトンのカルシウム画像を用いて 横のOFC神経活動を監視した.
  • ルール・スイッチングを含む様々な行動段階における神経活動について研究した.

主要な成果:

  • S1ニューラル活動は初期タスクの学習を反映し,横のOFCニューロンはルールスイッチに対する顕著な反応を示した.
  • 横のOFCからS1への直接の長距離投影を特定し,値予測エラー信号を送信します.
  • 上から下へのOFCフィードバックがS1応答を機能的に再マッピングし,報酬履歴に基づく感覚表現を更新することを実証しました.

結論:

  • 横の OFC と S1 の間のダイナミックな相互作用は,歴史に依存する,エラーベースの値予測計算を実行します.
  • 上から下へのOFCフィードバックは,S1の可塑性にとって不可欠であり,柔軟な意思決定に不可欠です.
  • この神経回路は 変化する環境条件に基づいて 行動に適応するために必要な可塑性を 提供します