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相关概念视频

Somatic Spinal Reflexes01:22

Somatic Spinal Reflexes

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Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
1.7K
Reflex Activity01:08

Reflex Activity

1.6K
A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
A reflex exam is a diagnostic procedure performed by a healthcare professional to evaluate the functionality of a patient's...
1.6K
Indirect Motor Pathways01:22

Indirect Motor Pathways

1.4K
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...
1.4K
Direct Motor Pathways01:11

Direct Motor Pathways

1.8K
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...
1.8K
Spinal Cord: Information Processing01:10

Spinal Cord: Information Processing

1.2K
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...
1.2K
Functions of the Nervous System01:18

Functions of the Nervous System

3.2K
The nervous system is responsible for coordinating and regulating the body's functions. It functions through three main processes: sensory, integrative, and motor processes. Sensory function involves the detection and transmission of information about internal and external stimuli from sensory receptors to the CNS. The CNS processes this information through an integrative function, where it interprets and makes decisions based on the incoming sensory information. Finally, the motor function...
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相关实验视频

Updated: Jun 4, 2025

Non-invasive Assessment of Changes in Corticomotoneuronal Transmission in Humans
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Non-invasive Assessment of Changes in Corticomotoneuronal Transmission in Humans

Published on: May 24, 2017

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未来的脊柱反射嵌入了初级运动皮层输出输出中.

Tatsuya Umeda1,2,3, Osamu Yokoyama4, Michiaki Suzuki4

  • 1Department of Developmental Physiology, National Institute for Physiological Sciences, National Institute of Natural Sciences, Okazaki, Aichi 4448585, Japan.

Science advances
|December 18, 2024
PubMed
概括
此摘要是机器生成的。

子的初级运动皮层 (M1) 在肢体运动期间预测和整合脊柱反射. 这种"交叉"通路允许M1通过预测和利用反射活动来优化运动指令.

更多相关视频

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

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Corticospinal Excitability Modulation During Action Observation
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Corticospinal Excitability Modulation During Action Observation

Published on: December 31, 2013

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相关实验视频

Last Updated: Jun 4, 2025

Non-invasive Assessment of Changes in Corticomotoneuronal Transmission in Humans
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Non-invasive Assessment of Changes in Corticomotoneuronal Transmission in Humans

Published on: May 24, 2017

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Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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Corticospinal Excitability Modulation During Action Observation
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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
  • 系统神经科学 系统神经科学

背景情况:

  • 哺乳动物的肢体运动涉及到自愿的皮层命令和非自愿的脊柱反射之间的复杂协调.
  • 大脑将下降的运动输出与脊髓反射活动相结合的神经机制在很大程度上是未知的.

研究的目的:

  • 研究运动相关的皮质区域,特别是主要运动皮质 (M1) 在预期的肢体运动中如何与脊柱反射协调.
  • 阐明神经通路涉及集成下降的运动命令和关联反精确的运动执行.

主要方法:

  • 从运动相关的皮质区域,关神经元和前肢肌肉的同时电生理记录,子执行达到任务.
  • 对神经活动的分析,以识别M1对 afferent活动和脊柱反射组件的编码.
  • 对 afferent 途径进行实验性破坏,以评估其对肌肉活动的贡献.

主要成果:

  • 主要运动皮层 (M1) 活动编码了与前肢运动相关的随后的 afferent 活动.
  • 此外,M1还编码了肌肉活动的一个组成部分,该成分是由 afferent反驱动的,这是脊柱反射的特征.
  • 干扰 afferent 途径选择性地减少了肌肉活动的脊柱反射组成部分.

结论:

  • M1利用一个"交叉"通道,将直接下降输出与脊柱反射调节相结合,以驱动肌肉活动.
  • M1采用内部前模型来前计算和整合未来的脊柱反射,以获得最佳的运动输出.
  • 这种机制允许适应性和精确的四肢运动,尽管持续的脊柱反射影响.