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Related Concept Videos

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.
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...
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Synaptic Signaling01:12

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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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
3.2K

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Updated: Dec 11, 2025

Paradigms for Pharmacological Characterization of C. elegans Synaptic Transmission Mutants
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Synaptic remodeling, lessons from C. elegans.

Andrea Cuentas-Condori1, David M Miller Rd2

  • 1Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA.

Journal of Neurogenetics
|August 19, 2020
PubMed
Summary
This summary is machine-generated.

Caenorhabditis elegans motor neurons reverse polarity, demonstrating synaptic remodeling. Studies in this model organism reveal pathways for neural circuit plasticity, offering insights into complex nervous systems.

Keywords:
Synaptic remodelingdendritic spinessynapse eliminationsynapse formation

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Sydney Brenner's use of Caenorhabditis elegans has advanced understanding of neural circuit development and behavior.
  • Synaptic remodeling, including polarity reversal in DD motor neurons, is a key process in C. elegans neural circuits.

Purpose of the Study:

  • To review synaptic remodeling in C. elegans motor circuits.
  • To explore how C. elegans studies can inform understanding of synaptic remodeling in more complex organisms, like mammals.

Main Methods:

  • Electron microscopy reconstruction.
  • Live cell imaging.
  • C. elegans genetics to identify effectors of synaptic plasticity.

Main Results:

  • DD motor neurons in C. elegans exhibit striking synaptic polarity reversal.
  • Key effectors of synaptic plasticity have been identified through genetic screens and live imaging.
  • Transcription factors regulating DD remodeling and the underlying cellular cascades are being elucidated.

Conclusions:

  • C. elegans serves as a powerful model for studying synaptic remodeling and neural circuit plasticity.
  • Mechanisms of synaptic remodeling in C. elegans may be conserved in vertebrate neurons.
  • Further research in C. elegans can uncover pathways relevant to synaptic plasticity in complex nervous systems.