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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.
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...
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The Synapse02:47

The Synapse

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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.
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Propagation of Action Potentials01:23

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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...
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Synaptic Signaling01:09

Synaptic Signaling

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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.
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The presynaptic neuron fires an action potential that...
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Neurons: The Axon01:21

Neurons: The Axon

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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....
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Neural Circuits01:25

Neural Circuits

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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...
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Parallel transmission in a synthetic nerve.

Charlotte E G Hoskin1,2, Vanessa Restrepo Schild1, Javier Vinals3

  • 1Chemistry Department, Oxford University, Oxford, UK.

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Summary

Researchers developed soft, bioinspired synthetic neurons from flexible biomaterials that transmit electrochemical signals. These artificial neurons mimic natural cells, releasing neurotransmitters to enable new possibilities in medicine and computing.

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Area of Science:

  • Bioelectronics
  • Biomaterials Science
  • Neuroscience

Background:

  • Tetherless and soft bioelectronic devices are crucial for advancements in medicine, robotics, and chemical computing.
  • Natural neurons transmit signals through electrochemical processes and neurotransmitter release.

Purpose of the Study:

  • To create bioinspired synthetic neurons using entirely soft, flexible biomaterials.
  • To demonstrate rapid electrochemical signal transmission and neurotransmitter release in synthetic neurons.
  • To explore the potential of synthetic nerves for transmitting spatiotemporal information.

Main Methods:

  • Constructed synthetic neurons from nanolitre aqueous droplets and hydrogel fibers connected by lipid bilayers.
  • Utilized light-driven proton pumps for transmission power and ion-conducting protein pores for signal mediation.
  • Bundled multiple synthetic neurons into a synthetic nerve to test signal propagation.

Main Results:

  • Achieved rapid electrochemical signal transmission over centimeter distances using the synthetic neurons.
  • Demonstrated that synthetic neurons release neurotransmitters, initiating downstream reactions similar to natural neurons.
  • Showed simultaneous propagation of distinct signals along parallel axons in a synthetic nerve, enabling spatiotemporal information transmission.

Conclusions:

  • Developed functional synthetic neurons and nerves from soft, flexible biomaterials.
  • Highlighted the potential of these bioinspired systems for applications in next-generation implants, soft robotics, and advanced computing.
  • Paved the way for novel bioelectronic devices mimicking biological neural functions.