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Brainstem01:19

Brainstem

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The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
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Indirect Motor Pathways01:22

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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.
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Functional Brain Systems: Limbic System01:15

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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Hierarchy of Motor Control01:18

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The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
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The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
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The cerebellum, also known as the "little brain," is located in the posterior cranial fossa, inferior to the tentorium cerebelli and dorsal to the brainstem. It plays a significant role in motor control, coordination, and proprioception.
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In Vivo Wireless Optogenetic Control of Skilled Motor Behavior
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脳の幹回路内の様々な前肢の動作のための機能マップ

Ludwig Ruder1,2, Riccardo Schina1,2, Harsh Kanodia1,2

  • 1Biozentrum, Department of Cell Biology, University of Basel, Basel, Switzerland.

Nature
|January 7, 2021
PubMed
まとめ
この要約は機械生成です。

研究者は前肢の 熟練した動きのための 脳幹回路をマッピングしました 横側ロストラルメドウ (latRM) の特定のニューロンの集団は 食物に手を伸ばしたり 触ったりといった行動を制御し 運動制御に関する新しい洞察を明らかにしています

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Functional Near Infrared Spectroscopy of the Sensory and Motor Brain Regions with Simultaneous Kinematic and EMG Monitoring During Motor Tasks
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科学分野:

  • 神経科学
  • モーター コントロール
  • 脳幹回路

背景:

  • 脳幹は身体の動きを 制御するのに不可欠です
  • 前肢の熟練した動きの神経制御の理解は限られており,脳の上部と脊髄に焦点を当てています.

研究 の 目的:

  • 脳幹の横側ロストラルメドウ (latRM) 内での熟練した前肢運動の機能マップを定義する.
  • 複雑な前肢の行動に 責任を負う特定のニューロンの集団と回路を特定する.

主な方法:

  • 自由に動くマウスの体内の電気生理学
  • 遺伝子操作とウイルスの追跡技術
  • ニューロン集団の光遺伝的刺激

主要な成果:

  • 異なる前肢の行動 (例えば,到達,食品の取り扱い) に調整されたlatRM集団のニューロンのコードを特定した.
  • 刺激性LATRMニューロンの乱れがこれらの作用を阻害した.
  • 刺激性ラットRMニューロンは軸索標的によって分離し,脳幹と脊髄回路を差異的に採用する.
  • 投影で定義されたlatRM集団の光遺伝的刺激は,多様で安定した前肢の動きを誘発した.

結論:

  • latRMのプロジェクション分層化された脳幹集団は,アクションフェーズをエンコードする.
  • これらの集団は複雑な前肢の動きを 制御する構成要素として機能します
  • 前肢のスキルのための 脳の幹の基質を特定した