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相关概念视频

Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Sensory Functions of the Skin01:16

Sensory Functions of the Skin

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
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Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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Introduction to Sensory Receptors01:31

Introduction to Sensory Receptors

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Sensory receptors are vital in our ability to perceive and interpret the world. Sensory receptors are specialized cells in the peripheral nervous system that respond to various stimuli and enable one to experience different sensations. Based on specific criteria, sensory receptors are classified into distinct types.
The first classification criterion is based on cell type, position, and function. Some receptor cells are neurons with free nerve endings, where their dendrites are embedded in the...
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
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交感输入和温度影响机械感受器中的感觉编码.

Jens-Steffen Scherer1, Kevin Sandbote1, Bjarne L Schultze1

  • 1Department of Neuroscience, Computational Neuroscience, Faculty VI, University of Oldenburg, Oldenburg, Germany.

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概括

具有多个尖峰启动区域 (SIZ) 的神经元可以灵活地处理信息. 李奇T细胞表明,突触输入和温度影响来自感官输入的峰值时间,这对于理解神经计算和冷血动物反应至关重要.

关键词:
行动潜力 行动潜力 行动潜力树突一体化是指树突一体化.李奇 (Leech) 是一个水.神经元的分离是神经元的分离.尖峰启动区的区域.斯派克延迟时间 (spike latency) 是一个延迟时间.温度的温度的温度的温度的温度触摸细胞触摸细胞

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In Vivo Calcium Imaging of Neuronal Ensembles in Networks of Primary Sensory Neurons in Intact Dorsal Root Ganglia
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Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicle Lanceolate Endings
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In Vivo Calcium Imaging of Neuronal Ensembles in Networks of Primary Sensory Neurons in Intact Dorsal Root Ganglia
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科学领域:

  • 神经科学是一个神经科学.
  • 计算神经科学是一种神经科学.
  • 感官生理学 感官生理学

背景情况:

  • 神经元通常具有多个尖峰启动区 (SIZ),增强计算能力和灵活性.
  • 感官神经元整合各种输入,依靠精确的尖峰时间来编码信息.
  • 在SIZ活动,突触输入和环境因素之间对尖峰传播的相互作用仍然不太了解.

研究的目的:

  • 调查突触输入和温度如何调节从一个SIZ到另一个SIZ的尖峰传播.
  • 了解多个SIZ相互作用对感觉神经元中时间和速率编码的功能影响.
  • 探索温度如何影响冷血动物的峰值时间.

主要方法:

  • 利用药用血T细胞作为细胞内记录和刺激的模型系统.
  • 同时应用体质去极化/超极化和触觉皮肤刺激.
  • 在不同温度和突触输入条件下分析了峰值延迟和检测.

主要成果:

  • 触摸引发的尖峰表现出比电流注射触发的尖峰更精确的时间.
  • 身体极极化增加了触觉诱导的尖峰的第一个尖峰延迟.
  • 当来自不同SIZ的尖峰发生在时间上时,尖峰到达soma的时间被推迟了.
  • 温度下降比例增加了峰值延迟,对从皮肤传播时间更长的影响更大.
  • 当来自两个来源的尖峰预计将同时到达时,检测到的尖峰较少.

结论:

  • 皮肤的尖峰传播时间由内部 (突触输入) 和外部 (温度) 因素调节.
  • 血虫T细胞作为理解多个SIZ相互作用如何影响感官信息编码的模型.
  • 峰值时间的温度依赖调节对于冷血生物的充分感官处理至关重要.