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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...
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Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
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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.
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Updated: Nov 15, 2025

Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
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Synaptic Plasticity and its Modulation by Alcohol.

Yosef Avchalumov1, Chitra D Mandyam1,2

  • 1VA San Diego Healthcare System, San Diego, CA, USA.

Brain Plasticity (Amsterdam, Netherlands)
|March 8, 2021
PubMed
Summary
This summary is machine-generated.

Alcohol use disorder (AUD) is a brain disorder where alcohol affects synaptic plasticity, crucial for learning and memory. Understanding these alcohol-induced brain changes may lead to better AUD treatments.

Keywords:
LTPcortexdorsal striatumethanolhippocampus

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Addiction Research

Background:

  • Alcohol use disorder (AUD) is a significant public health issue linked to brain dysfunction.
  • Synaptic plasticity, essential for learning and memory, is modulated by various stimuli.
  • N-methyl-D-aspartate receptors (NMDARs) are key targets of alcohol and involved in learning and memory.

Purpose of the Study:

  • To review the mechanisms of long-term synaptic plasticity in key brain regions.
  • To discuss how alcohol (ethanol, EtOH) modulates synaptic plasticity in these regions.
  • To elucidate the role of glutamatergic signaling in alcohol's effects on the brain and AUD.

Main Methods:

  • Review of neurophysiological and electrophysiological studies.
  • Focus on synaptic plasticity mechanisms in the dorsal striatum, neocortex, and hippocampus.
  • Analysis of alcohol's modulation of NMDAR-dependent and independent pathways.

Main Results:

  • Alcohol significantly modulates long-term synaptic plasticity in the dorsal striatum, neocortex, and hippocampus.
  • NMDARs are identified as critical mediators of alcohol's effects on synaptic function.
  • Ethanol's impact on synaptic transmission is region-specific and pathway-dependent.

Conclusions:

  • Understanding alcohol's effects on synaptic plasticity is crucial for comprehending AUD.
  • Targeting glutamatergic signaling may offer therapeutic strategies for AUD.
  • Further research into alcohol-induced neural changes can inform the development of novel treatments for AUD.