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Related Concept Videos

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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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
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Chemical Synapses01:26

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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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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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Related Experiment Video

Updated: Apr 15, 2026

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The interplay between synaptic activity and neuroligin function in the CNS.

Xiaoge Hu1, Jian-hong Luo1, Junyu Xu1

  • 1Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China.

Biomed Research International
|April 4, 2015
PubMed
Summary

Neuroligins (NLs) are key proteins regulating synapses. This review explores how NLs and synaptic activity interact, impacting brain function and disorders like autism.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Neuroligins (NLs) are postsynaptic cell-adhesion proteins crucial for synapse regulation.
  • NLs are implicated in synapse formation, synaptic transmission, and neurological disorders.

Purpose of the Study:

  • To review the bidirectional relationship between neuroligins and synaptic activity.
  • To highlight the importance of understanding NLs in clinical research.

Main Methods:

  • Literature review of in vitro and in vivo studies.
  • Analysis of genetic mutations and their behavioral phenotypes in animal models.
  • Discussion of post-translational modifications of NLs.

Main Results:

  • NL1 and NL3 primarily influence excitatory synapses; NL2 affects inhibitory synapses.
  • NL gene mutations are linked to autism spectrum disorders and mental retardation.
  • Synaptic activity dynamically regulates NLs (phosphorylation, expression, cleavage), influencing synaptic function.

Conclusions:

  • Neuroligins and synaptic activity have a reciprocal influence on each other.
  • Understanding this interaction is critical for addressing neurological conditions associated with synapse dysfunction.