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Updated: May 21, 2026

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Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
Published on: June 29, 2018
在快速网络振荡期间,轴突和体活动的分离
Tamar Dugladze1, Dietmar Schmitz, Miles A Whittington
1Institute of Neurophysiology, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany.
概括
轴轴细胞 (AACs) 防止金字塔细胞 (PCs) 中的异位动作潜能在网络振荡期间到达 soma. 轴突和体活动的这种分离维持了神经元的两极分化.
科学领域:
- 神经科学是一个神经科学.
- 细胞神经科学 细胞神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 中枢神经元中的信息流向从树突向轴突终端.
- 网络振荡,如马振荡,可以影响神经元活动模式.
- 金字塔细胞 (PC) 和轴突细胞 (AAC) 是皮层电路中的关键神经元类型.
研究的目的:
- 为了研究axo-axonic细胞 (AACs) 在调节网络振荡期间在金字塔细胞 (PCs) 中的动作潜力传播中的作用.
- 为了确定AAC是否可以防止轴突中的异胎动力潜能入侵 soma.
- 了解AAC如何促进皮层神经元的功能极化.
主要方法:
- 在动物皮层切片中的体外电生理学记录.
- 诱导玛振荡. 诱导玛振荡. 诱导玛振荡.
- 高频刺激以唤起远端轴突中的子宫外动作潜能.
- 对AAC和篮细胞进行光遗传或电刺激.
- 测量动作潜力的入侵到金字塔细胞的 soma.
主要成果:
- 宫外动作潜能在马振荡期间在PC的远端轴突中高频生成,但没有侵入 soma.
- 轴突-轴突细胞 (AACs) 高速放电,并以强力抑制轴突初始段.
- 单个AAC的激活显著减少了后突触PC中的抗动力潜力的索马入侵.
- 索马抑制篮细胞的激活对索马侵袭没有显著影响.
结论:
- 轴-轴突细胞 (AAC) 在皮质金字塔细胞 (PC) 中分离轴突和体活动中起着至关重要的作用.
- 在网络振荡过程中,AACs防止子宫外动作潜能反向传播到 soma 中,保持神经元两极分化.
- 这些发现突出了AACs在振荡活动期间对皮质电路功能至关重要的特定抑制机制.
相关概念视频
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...
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...
Neurons: The Axon
Axons are long, cytoplasmic processes of nerve cells capable of propagating electrical impulses known as action potentials. The cytoplasm or axoplasm of an axon contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes, all encased within the axolemma, the plasma membrane of the axon.
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment.
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment.
Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
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...

