行動に依存した,体感覚皮質の長距離投影ニューロンの採用
Jerry L Chen1, Stefano Carta, Joana Soldado-Magraner
1Brain Research Institute, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
Nature
|June 25, 2013
まとめ
ネズミの脳の神経経路は,行動によって異なる感覚情報を伝達します. 主要体感覚皮質 (S1) の明確な投影ニューロンは,選択的にモーターおよび関連領域にひげに関連するデータを送信します.
科学分野:
- 神経科学は神経科学である.
- 感覚処理は,感覚を処理するプロセスです.
- 皮質回路は,皮質回路である.
背景:
- 哺乳類の新皮質は,感覚表現のために分離された処理ストリームに依存しています.
- 行動中に主感覚皮質から遠くの領域への局所情報の伝達については,まだ十分に理解されていません.
研究 の 目的:
- 行動中に主体体感覚皮質 (S1) のプロジェクションニューロンのタスク依存活性化を調査する.
- 情報をS1から二次体感覚 (S2) と一次運動 (M1) 皮質に選択的に伝達する方法を決定する.
主な方法:
- 2フォトンカルシウム画像は,覚醒した,行動するマウスで,テクスチャの差別とオブジェクト検出のタスクを実行します.
- 解剖学的に識別されたS1ニューロンのS2またはM1に投影するニューロンの活動を監視する.
- S2投射 (S2P) とM1投射 (M1P) のニューロンのタスク依存の反応と差別的能力を分析する.
主要な成果:
- S2Pではウィスキング関連の細胞が特定されたが,M1Pニューロンでは特定されなかった.
- S2Pニューロンは,テクスチャの識別時により多くのタッチ応答を示し,M1Pニューロンは,位置検出時により多くのタッチ応答を示した.
- S2PニューロンとM1Pニューロンは,行動に関する決定を同じように差別したが,S2Pニューロンはテクスチャの差別に優れ,M1Pニューロンは,決定が同じである場合,位置の差別に優れていた.
結論:
- S1からの情報をS2やM1に選択的に伝達するのは,単なる感覚的な特徴ではなく,行動的な文脈によって引き起こされる.
- S1の異なる投影ニューロン集団は,異なる行動目標のための感覚情報を伝達する専門的な役割を果たします.
関連する概念動画
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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...
Overview of Somatic Sensory Pathways
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...
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
Sensory Perception: Organization of the Somatosensory System
The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...
Major Somatic Sensory Pathways
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 posterior columns...
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,...
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