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相关概念视频

Electrical Synapses01:28

Electrical Synapses

8.9K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
8.9K
The Synapse02:47

The Synapse

127.5K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
127.5K
Synaptic Signaling01:09

Synaptic Signaling

5.8K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
5.8K
Neuronal Communication01:28

Neuronal Communication

1.5K
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...
1.5K
Neural Circuits01:25

Neural Circuits

1.6K
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...
1.6K
Overview of Synapses01:25

Overview of Synapses

3.1K
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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相关实验视频

Updated: Sep 20, 2025

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
06:36

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording

Published on: September 1, 2022

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人工光电子突触具有双向后突触电流,用于紧和节能的神经硬件.

Hogeun Ahn1,2, Yena Kim3, Seunghwan Seo2,4,5

  • 1Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.

Advanced materials (Deerfield Beach, Fla.)
|May 28, 2025
PubMed
概括

这项研究引入了一种具有双向电流流量的新型人工光电子突触,消除了硬件神经网络 (HW-NN) 中对联设备的需求. 这项创新提高了大脑启发的计算系统的能源效率和紧性.

关键词:
大脑启发的计算硬件神经网络,人工突触,人工光电子突触,不对称的金属接触,范德瓦尔斯层级材料.

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Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes
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Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts
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相关实验视频

Last Updated: Sep 20, 2025

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科学领域:

  • 材料科学 材料科学 材料科学
  • 神经科学是一个神经科学.
  • 电气工程 电气工程

背景情况:

  • 传统的硬件神经网络 (HW-NN) 使用具有单向电流流量的人工突触,需要差异对来实现重量核心.
  • 这需要复杂的电路,并增加了神经形态计算中的能源消耗.

研究的目的:

  • 开发一种能够实现双向后突触电流 (IPSC) 的人工光电子突触.
  • 消除在HW-NNs中对差异性突触对的需要.
  • 为了证明大脑启发的计算在增强的能源效率和紧性.

主要方法:

  • 一个光电子突触的制造,具有不对称的金属接触结构和与WSe2半导体通道集成的电荷捕获/解锁层 (h-BN/重量控制层).
  • 突触行为的表征,包括长期的潜能/抑郁和依赖尖峰时间的可塑性.
  • 用于多重积累操作的3 × 2人工突触阵列的演示以及MNIST手写数字识别的模拟.

主要成果:

  • 人工突触表现出双向IPSC,消除了对差异对的要求.
  • 该设备成功模拟了关键的突触可塑性机制.
  • 在MNIST数据集上的模拟显示了具有竞争力的识别率,并减少了重量更新的能源消耗.

结论:

  • 开发的双向光电子突触为HW-NNN提供了更紧,更节能的解决方案.
  • 这项技术推动了实用的脑启发式计算系统的发展.
  • 这种方法证明了下一代神经形态硬件的巨大潜力.