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myelinated

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myelinated
myelinated, a. (Formerly at myelin n.1) Anat. (ˈmaɪəlɪneɪtɪd) [f. myelin n.1 + -ate3 + -ed1.] Of a nerve fibre: surrounded by a myelin sheath.1899 Allbutt's Syst. Med. VII. 75 An exceedingly small group of myelinated fibres. 1956 Nature 28 Jan. 164/2 His [sc. Kulchitsky's] name is continually recall... Oxford English Dictionary
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Myelin incisure
Development In the peripheral nervous system (PNS) axons can be either myelinated or unmyelinated. These pockets, or "incisures", can subdivide the myelinated axon into irregular portions. wikipedia.org
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myelinate
myelinate, v. Anat. (ˈmaɪəlɪneɪt) [f. myelin n.1 + -ate3.] intr. To secrete myelin; to become myelinated. Cf. *myelinated a.1914 Brain XXXVI. 478 The globus pallidus and the ansa lenticularis myelinate earlier than the fibres of the rest of the striatum. 1930 Arch. Neurol. & Psychiatry XXIV. 852 The... Oxford English Dictionary
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Saltatory conduction
Mechanism Myelinated axons only allow action potentials to occur at the unmyelinated nodes of Ranvier that occur between the myelinated internodes. Distribution Saltatory conduction occurs widely in the myelinated nerve fibers of vertebrates, but was later discovered in a pair of medial myelinated wikipedia.org
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At small axon diameters (<1 µm), why does myelination not increase neuronal conduction velocity? As per the diagram below (and other graphs available online), why do unmyelinated fibres have a higher conduction veloci...
Graphs like these are based on a _complete cross-sectional area_. Myelination adds thickness, so if you want to add myelin outside and keep the same diameter, you have to have a smaller lumen inside the axon. As you can see in the "unmyelinated" plot versus diameter, smaller fibers have lower conduc...
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Group A nerve fiber
Group A are heavily myelinated, group B are moderately myelinated, and group C are unmyelinated. C fibers, but more slowly than other, more thickly myelinated group A nerve fibers. wikipedia.org
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Action potential attenuation in unmyelinated axons vs demyelinated axons I learnt that action potentials travel much faster along myelinated axons, and when these axons are demyelinated the action potentials travel mu...
Myelinated axons are built differently. They have stretches of myelinated axon which are (mostly) free of voltage-gated channels, interrupted by nodes of Ranvier that lack myelin but have dense
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Striatopallidal fibres
The striatopallidal fibres, also Wilson's pencils, pencil fibres of Wilson, and pencils of Wilson, are prominent myelinated fibres that connect the striatum wikipedia.org
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What is the function of nodes of Ranvier in axons? In a neuroscience class I'm taking, it was explained that myelin covers axons in sections, the uncovered sections are called nodes of Ranvier, and signals propagate m...
Every signal rapidly fades out with distance if it is not amplified. So if the whole axon were covered with myelin, action potentials wouldn't reach their target. Each Ranvier node can be seen as an active signal repeater.
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Group B nerve fiber
They are moderately myelinated, which means less myelinated than group A nerve fibers, and more myelinated than group C nerve fibers. wikipedia.org
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Figure 38-3 A myelinated axon - SlideServe
The orientation 方向 and movement of the head, information that is used to control balance and body posture 身体姿式. 39.3 How Is Sound Detected? • The ear converts sound waves into electrical signals • Sound is produced by vibrating objects—drums, vocal cords 声带, or the speakers 扬声器 in your cell phone • Our ears convert ...
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White ramus communicans
White rami communicantes contain both myelinated and unmyelinated preganglionic sympathetic fibers, (GVE and GVA). The white ramus appears white because there are more myelinated than unmyelinated fibers unlike the gray rami. wikipedia.org
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What gives nerves their silver colour? I always thought the silver colour specific to nerves was due to the myelin sheaths, but I've observed that unmyelinated C fibres display that same silvery appearance. Where does...
This surrounds all nerves, whether they contain myelinated fibers, unmyelinated fibers, or both. Hence, whether a nerve contains myelinated axons, unmyelinated ones, or both will not determine its outward appearance. ![nerve]( Fig. 1.
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神经内膜
参考文献 参见 神经外膜 神经束膜 外部连结 Endoneurium at eMedicine Dictionary Histology at BU - "Ultrastructure of the Cell: myelinated axon and Schwann cell" Histology wikipedia.org
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为什么生物的感知器官一般都集中在头部?
Myelinated nerve fibers: computed effect of myelin thickness on conduction velocity.American Journal of Physiology-Legacy Content,219(5), 1256-1258. [19 Relative conduction velocities of small myelinated and non-myelinated fibres in the central nervous system.Nature New Biology,238(85), 217. zhihu
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