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相关概念视频

Propagation of Action Potentials01:23

Propagation of Action Potentials

The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Postsynaptic Potential (PSP)01:32

Postsynaptic Potential (PSP)

Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
Neural Circuits01:25

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
Spinal Cord: Information Processing01:10

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...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...

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相关实验视频

Updated: May 13, 2026

Closed-loop Neuro-robotic Experiments to Test Computational Properties of Neuronal Networks
11:18

Closed-loop Neuro-robotic Experiments to Test Computational Properties of Neuronal Networks

Published on: March 2, 2015

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损伤解释了神经网络中的功能,这些神经网络代表了中央模式生成器.

Yuriy Pryyma1, Sergiy Yakovenko2,3,4,5,6

  • 1Faculty of Applied Science, Ukrainian Catholic University, Lviv, Ukraine.

Journal of neural engineering
|December 3, 2024
PubMed
概括
此摘要是机器生成的。

这项研究使用尖端神经网络 (SNN) 中央模式发生器 (CPG) 建模运动运动控制. 它揭示了模拟损伤如何影响神经计算以及外部驱动器如何恢复功能.

关键词:
在CPG中,使用的是CPG.中央模式发生器伤害的伤害的伤害的伤害.机车运动 机车运动模型模型模型模型模型模型尖的神经网络的神经网络.

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Investigating Functional Regeneration in Organotypic Spinal Cord Co-cultures Grown on Multi-electrode Arrays
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Using Neuron Spiking Activity to Trigger Closed-Loop Stimuli in Neurophysiological Experiments
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Using Neuron Spiking Activity to Trigger Closed-Loop Stimuli in Neurophysiological Experiments

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相关实验视频

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Closed-loop Neuro-robotic Experiments to Test Computational Properties of Neuronal Networks
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科学领域:

  • 神经科学是一个神经科学.
  • 计算生物学 计算生物学
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 复杂的生物系统中的运动控制依赖于预测机制来克服噪音输入和延迟.
  • 脊椎动物的运动涉及被动动态和神经振荡器之间的相互作用,特别是中央模式发生器 (CPG).
  • 现有的CPG速率模型准确地描述了步态模式,但尖端神经网络 (SNN) 中的神经计算仍然不太了解.

研究的目的:

  • 开发一个发动机中央模式发生器 (CPG) 的尖端神经网络 (SNN) 模型.
  • 研究模拟神经电路损伤对分布式计算的影响.
  • 探索外部驱动器在损坏后恢复功能的潜力.

主要方法:

  • 使用尖端神经网络 (SNN) 架构开发了一个运动机 CPG 模型.
  • 验证了SNN-CPG模型与步态相调节的既定速率模型相对应.
  • 在SNN-CPG中模拟渐进性病变以分析计算退化.

主要成果:

  • 该SNN-CPG模型准确地复制了速率模型的输入-输出动态.
  • 模拟的病变对 flexor 和延伸器功能产生了差异性影响,与实验观察一致.
  • 增加的外部驱动力有效地弥补了结构损伤,并恢复了运动器官功能.

结论:

  • 该研究提供了对运动控制网络动态的理论见解.
  • 介绍了神经电路中"降级计算"的概念.
  • 突出了外部驱动器在机车行驶中恢复性技术的潜力.