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関連する概念動画

Long-term Potentiation01:35

Long-term Potentiation

58.3K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
58.3K
Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

4.3K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
4.3K
Tension01:10

Tension

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Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" comes from Latin, meaning "to stretch". Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons. Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pull only parallel to its length; so, a force carried by a flexible connector is a tension with a...
13.6K
Motor Unit Stimulation01:20

Motor Unit Stimulation

3.5K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
3.5K
Long-term Potentiation01:25

Long-term Potentiation

3.4K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when...
3.4K
Upward Impending Motion01:21

Upward Impending Motion

568
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. Its operation is based on converting the force applied at its handle into a torsional moment, causing the upward impending motion of the screw. This movement is accomplished by overcoming the static friction between the threads of the screw and the jack.
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...
568

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Updated: Jan 19, 2026

Reducing State Anxiety Using Working Memory Maintenance
08:17

Reducing State Anxiety Using Working Memory Maintenance

Published on: July 19, 2017

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興奮 を 徐々に 増し ます

Christina Müller1, Stefan Remy1

  • 1Neuronal Networks Group, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany.

Cell
|June 18, 2016
PubMed
まとめ
この要約は機械生成です。

体重の調節には 遅いシナプス統合を利用する 低頭部の神経細胞が関与します このプロセスは,行動状態に影響を与える電圧ゲートナトリウムチャネルNav1.7によって効果的に媒介されます.

さらに関連する動画

Disrupting Reconsolidation of Fear Memory in Humans by a Noradrenergic β-Blocker
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Disrupting Reconsolidation of Fear Memory in Humans by a Noradrenergic β-Blocker

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A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions
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A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions

Published on: March 25, 2014

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関連する実験動画

Last Updated: Jan 19, 2026

Reducing State Anxiety Using Working Memory Maintenance
08:17

Reducing State Anxiety Using Working Memory Maintenance

Published on: July 19, 2017

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Disrupting Reconsolidation of Fear Memory in Humans by a Noradrenergic β-Blocker
08:32

Disrupting Reconsolidation of Fear Memory in Humans by a Noradrenergic β-Blocker

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A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions
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科学分野:

  • 神経科学
  • 生理学
  • 分子生物学

背景:

  • ニューロンは 時間のスケールから 時間のスケールまで 異なる時間的統合特性を表しています
  • 視床下部の神経細胞は 体重などの基本的な生理学的プロセスを 調節する上で重要な役割を果たします
  • 神経機能と行動制御には シナプス統合メカニズムが不可欠です

研究 の 目的:

  • 下垂体ニューロンの遅いシナプス統合のメカニズムを調査する.
  • 体重を調節する特定のイオンチャネルの役割を決定する.
  • ニューロンの活動パターンが長期的な生理状態にどのように影響するか解明する.

主な方法:

  • 視床下部の神経細胞からの 電気生理学的記録
  • Nav1.7チャネルの機能を研究する 遺伝子操作です
  • 体重の調節を評価するイン・ビボ試験

主要な成果:

  • 低頭部の神経細胞は ゆっくりとしたシナプス統合の 極めて効果的な形態を 採用していることが示されました
  • この緩やかな統合の重要な媒介として,電圧ゲートナトリウムチャネルNav1.7を特定しました.
  • Nav1. 7による緩やかな統合と体重調節の間の直接的な関係を示した.

結論:

  • NAV1. 7は,下垂体ニューロンの遅いシナプス統合に不可欠です.
  • この統合メカニズムは,体重の恒常性を維持するために非常に重要です.
  • 発見は代謝障害に対処するための新しい分子標的を明らかにします.