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相关概念视频

Indirect Motor Pathways01:22

Indirect Motor Pathways

3.0K
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...
3.0K
Direct Motor Pathways01:11

Direct Motor Pathways

4.1K
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...
4.1K
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

2.3K
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...
2.3K
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

8.2K
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...
8.2K
Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

3.7K
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...
3.7K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

6.8K
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....
6.8K

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相关实验视频

Updated: Jan 10, 2026

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior
07:52

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior

Published on: November 22, 2021

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行动计数和指导的状通路.

Isabella P Fallon1, Marina Roshchina2, Feiyang Hong2

  • 1Department of Neurobiology, Duke University School of Medicine, Durham, NC, 27708, USA.

bioRxiv : the preprint server for biology
|November 24, 2025
PubMed
概括
此摘要是机器生成的。

基底 (BG) 通过整合动作序列和动力学来控制运动. 操纵直接 (dSPN) 和间接 (iSPN) 路径揭示了它们在目标导向行为和行动计数中的作用.

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相关实验视频

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Assessing Corticospinal Excitability During Goal-Directed Reaching Behavior
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科学领域:

  • 神经科学是一个神经科学.
  • 发动机控制器的控制器
  • 计算神经科学是一种神经科学.

背景情况:

  • 基底腺 (BG) 对于运动控制至关重要,但它们在协调自愿运动方面的具体功能仍在争论中.
  • 了解底层的神经回路运动启动,执行和目标导向行为至关重要.

研究的目的:

  • 调查直通道 (dSPN) 和间接通道 (iSPN) 条状投影神经元在运动控制和动作测序中的作用.
  • 阐明基底如何整合动态和序列信息来引导行为达到目标.

主要方法:

  • 在小鼠中开发了一种新的操作数计数任务,以量化连续动力学,离散动作和动作序列.
  • 利用光遗传学操纵来选择性地激活或抑制dSPN和iSPN.
  • 在体内成像中使用以记录任务执行期间在条状投射神经元中的神经活动.

主要成果:

  • 对dSPNs的光遗传激活延长了动作序列,模仿蓄电池重置,而iSPN激活终止了它们,模仿计数完成.
  • 显而易见的dSPN和iSPN混合群体显示了与杆方法和计数进展相关的激增活动.
  • 在dSPN和iSPN群体之间的神经活动差异随着空间和数量目标的接近而扩大.

结论:

  • 基底结体采用一个涉及dSPNs和iSPNs的推拉模型,以整合动态和顺序表示来实现目标导向的运动控制.
  • 这些发现突出了BG在监测和指导行为目标的进展中的作用,通过统一离散和连续的运动控制来实现这一目标.