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運動の内部モニタリングのための霊長類の脳の経路
Marc A Sommer1, Robert H Wurtz
1Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA. mas@lsr.nei.nih.gov
まとめ
科学者は,眼の動きのためのコロラリ放電信号を運ぶ脳の経路を特定しました. この経路の無効化により,連続した眼球の動きが妨げられ,運動制御におけるその役割が確認されました.
科学分野:
- 神経科学は神経科学である.
- 霊長類の脳の研究
- モーターコントロールメカニズム モーターコントロールメカニズム
背景:
- 脳が自己発生した動きを追跡する方法を理解することは,運動制御に不可欠です.
- 運動の結果を予測する神経信号である相続放電が,重要な役割を果たしていると考えられています.
- 以前,脳幹から前頭皮質への特定の経路が特定されていましたが,その機能は不明でした.
研究 の 目的:
- 特定された脳幹-前頭皮質経路が,相続性放電信号を運ぶかどうかを調査する.
- この経路が次の動き,特に目の動きをコードする役割を決定する.
- この経路の無効化がモーター制御に与える影響を評価する.
主な方法:
- ニューロンの活動を監視するために,霊長類マカカ・ムラッタにおける電気生理学的記録.
- 脳幹-前頭皮質経路の標的型無活性化.
- 経路の不活性化前のおよび後の単一のおよび連続的な眼球運動の行動テスト.
主要な成果:
- この経路内のニューロン活動が,目動きの情報をコードしていることが判明した.
- 経路の不活性化により,連続した眼球運動の実行に障害が生じました.
- 単眼の動きは,経路の不活性化によって影響を受けませんでした.
結論:
- この研究は,霊長類の脳内の特定の神経経路を特定し,従来の放電信号を伝達する責任を負っている.
- この経路は,連続した眼の動きの正確な実行に不可欠です.
- この発見は,運動制御における自己モニタリングのニューラル基盤に関する重要な洞察を提供します.
関連する概念動画
Diencephalon: Thalamus and Information Relay
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 states or needs.
Brainstem
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...
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...
Spinal Cord: Information Processing
The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
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...
Direct Motor Pathways
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 the...
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 the...
Indirect Motor Pathways
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...
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...

