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Related Concept Videos

Synaptic Signaling01:09

Synaptic Signaling

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...
Synaptic Signaling01:12

Synaptic Signaling

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.
Integration of Synaptic Events01:28

Integration of Synaptic Events

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...
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Long-term Potentiation01:35

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Long-term Depression01:03

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over time, all...

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Related Experiment Video

Updated: Jun 17, 2026

Utilizing In Vivo Postnatal Electroporation to Study Cerebellar Granule Neuron Morphology and Synapse Development
04:20

Utilizing In Vivo Postnatal Electroporation to Study Cerebellar Granule Neuron Morphology and Synapse Development

Published on: June 9, 2021

Nibbling away at synaptic development.

Wei Shen1, Barry Ganetzky

  • 1Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI, USA.

Autophagy
|December 17, 2009
PubMed
Summary
This summary is machine-generated.

Autophagy promotes synaptic development in Drosophila by downregulating the Highwire E3 ubiquitin ligase. This process is crucial for normal growth and remodeling of the neuromuscular junction (NMJ).

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Experience-Dependent Remodeling of Juvenile Brain Olfactory Sensory Neuron Synaptic Connectivity in an Early-Life Critical Period
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Experience-Dependent Remodeling of Juvenile Brain Olfactory Sensory Neuron Synaptic Connectivity in an Early-Life Critical Period

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Related Experiment Videos

Last Updated: Jun 17, 2026

Utilizing In Vivo Postnatal Electroporation to Study Cerebellar Granule Neuron Morphology and Synapse Development
04:20

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Published on: June 9, 2021

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Experience-Dependent Remodeling of Juvenile Brain Olfactory Sensory Neuron Synaptic Connectivity in an Early-Life Critical Period
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Experience-Dependent Remodeling of Juvenile Brain Olfactory Sensory Neuron Synaptic Connectivity in an Early-Life Critical Period

Published on: March 1, 2024

Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Autophagy is a cellular process involved in degradation and recycling.
  • Beyond starvation, autophagy plays roles in normal development and tissue remodeling.
  • Synaptic development and plasticity are critical for nervous system function.

Purpose of the Study:

  • To investigate the role of autophagy in synaptic development.
  • To elucidate the molecular mechanisms by which autophagy influences neuromuscular junction (NMJ) growth in Drosophila.

Main Methods:

  • Utilized Drosophila melanogaster as a model organism.
  • Employed genetic and molecular techniques to study autophagy and its targets.
  • Analyzed synaptic structure and function at the larval neuromuscular junction (NMJ).

Main Results:

  • Demonstrated that autophagy promotes synaptic development at the Drosophila larval NMJ.
  • Identified Highwire (Hiw), an E3 ubiquitin ligase, as a key target downregulated by autophagy.
  • Showed that Hiw limits NMJ growth through a MAPKKK pathway.

Conclusions:

  • Autophagy is a critical regulator of synaptic growth during development.
  • Downregulation of Highwire by autophagy is a mechanism controlling NMJ development.
  • Further research may explore autophagy's role in synaptic remodeling related to learning and memory.