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Related Concept Videos

Electrical Synapses01:28

Electrical Synapses

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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.
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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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The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Scalable Fluidic Injector Arrays for Viral Targeting of Intact 3-D Brain Circuits
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Vertical organic synapse expandable to 3D crossbar array.

Yongsuk Choi1, Seyong Oh2, Chuan Qian1

  • 1Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Republic of Korea.

Nature Communications
|September 15, 2020
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Summary
This summary is machine-generated.

Researchers developed a novel vertical three-terminal synapse using ion gel for remote weight updates. This innovation enables high-density, high-performance neuromorphic computing with improved processing speeds and energy efficiency.

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Area of Science:

  • Materials Science
  • Neuroscience
  • Electrical Engineering

Background:

  • Three-terminal synaptic devices offer nondestructive weight updates by separating read/write functions.
  • Existing designs face limitations in array density, processing speed, and energy efficiency due to structural constraints.

Purpose of the Study:

  • To propose and demonstrate a novel vertical three-terminal synapse with remote weight update capabilities.
  • To address the limitations of conventional synaptic devices for enhanced neuromorphic computing.

Main Methods:

  • Development of a vertical three-terminal synapse utilizing ion gel for remote weight modulation.
  • Integration into a crossbar array structure for scalability.
  • Demonstration of synaptic characteristics through precise ion penetration control.

Main Results:

  • The vertical synapse exhibited excellent synaptic characteristics.
  • Precise control over ion penetration enabled effective weight updates.
  • The device was successfully applied to a crossbar synapse array for neuromorphic computing.

Conclusions:

  • The proposed vertical three-terminal synapse offers a promising solution for high-performance and high-density neural networks.
  • This technology advances the development of efficient neuromorphic computing systems.