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関連する概念動画

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...
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...
The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Action Potential: Phases of Stimulation01:28

Action Potential: Phases of Stimulation

The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
Neuronal Communication01:28

Neuronal Communication

Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
Overview of Synapses01:25

Overview of Synapses

A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...

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Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures
16:01

Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures

Published on: August 1, 2011

皮質回路における非同期状態である.

Alfonso Renart1, Jaime de la Rocha, Peter Bartho

  • 1Center for Molecular and Behavioral Neuroscience, Rutgers University, Newark, NJ 07102, USA. arenart@andromeda.rutgers.edu

Science (New York, N.Y.)
|January 30, 2010
PubMed
まとめ
この要約は機械生成です。

繰り返し発生するニューラルネットワークは,共有された入力にもかかわらず,低スパイク相関を生成することができます. ネズミの新皮質で観察されたこの非同期状態は,情報処理における神経相関の役割を再考することを示唆しています.

さらに関連する動画

Induction of an Isoelectric Brain State to Investigate the Impact of Endogenous Synaptic Activity on Neuronal Excitability In Vivo
10:19

Induction of an Isoelectric Brain State to Investigate the Impact of Endogenous Synaptic Activity on Neuronal Excitability In Vivo

Published on: March 31, 2016

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond
08:08

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond

Published on: June 24, 2015

関連する実験動画

Last Updated: Jun 16, 2026

Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures
16:01

Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures

Published on: August 1, 2011

Induction of an Isoelectric Brain State to Investigate the Impact of Endogenous Synaptic Activity on Neuronal Excitability In Vivo
10:19

Induction of an Isoelectric Brain State to Investigate the Impact of Endogenous Synaptic Activity on Neuronal Excitability In Vivo

Published on: March 31, 2016

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond
08:08

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond

Published on: June 24, 2015

科学分野:

  • 計算神経科学とは
  • 神経回路は,神経回路を構成しています.

背景:

  • 相関神経のスパイキングは,皮質回路で一般的です.
  • これらの相関の機能的役割は議論されており,情報解読を制限する懸念がある.

研究 の 目的:

  • 繰り返しのニューラルネットワークが,共有された入力にもかかわらず,低スパイク相関性を達成できるかどうかを調査する.
  • このような非同期状態を生成するメカニズムを探求する.

主な方法:

  • 繰り返しのニューラルネットワークの理論モデリング.
  • 刺激性および抑制性ニューロン集団における自発的な変動の分析.
  • ネズミの新皮質からの in vivo 記録を用いた実験的検証.

主要な成果:

  • リキュアントネットワークは,低平均スパイキング相関を持つ非同期状態を生成することができます.
  • 共有されたインプットは,シナプス電流の負の相関によって補償されます.
  • ネズミの新皮質において,ほぼゼロの平均相関が実験的に観察されました.

結論:

  • ニューラルネットワークは,重要な共有の入力でも,低い相関を維持することができます.
  • アシンクロン状態は,相関の影響を軽減するための潜在的なメカニズムを提供します.
  • この発見は,神経相関の起源と機能的影響の再評価を促した.