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Related Concept Videos

Excitatory and Inhibitory Effects of Neurotransmitters01:29

Excitatory and Inhibitory Effects of Neurotransmitters

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 specific...
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Postsynaptic Potential (PSP)

Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
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The ionotropic receptor is the membrane protein that has an...
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Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
The Synapse02:47

The Synapse

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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Microtransplantation of Synaptic Membranes to Reactivate Human Synaptic Receptors for Functional Studies
10:08

Microtransplantation of Synaptic Membranes to Reactivate Human Synaptic Receptors for Functional Studies

Published on: July 20, 2022

Presynaptic function in health and disease.

Clarissa L Waites1, Craig C Garner

  • 1Department of Psychiatry and Behavioral Sciences, Nancy Pritzker Laboratory, Stanford University School of Medicine, 1201 Welch Rd. Palo Alto, CA 94304-5485, USA.

Trends in Neurosciences
|May 21, 2011
PubMed
Summary
This summary is machine-generated.

Presynaptic boutons are crucial for neuronal communication and neurotransmitter release. Defects in these structures are linked to neurodevelopmental and neurodegenerative diseases, impacting cognition and behavior.

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Last Updated: Jun 1, 2026

Microtransplantation of Synaptic Membranes to Reactivate Human Synaptic Receptors for Functional Studies
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Published on: July 20, 2022

Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Neurons communicate via synapses, with presynaptic boutons releasing neurotransmitters.
  • Dysfunctional presynaptic boutons are implicated in neurodevelopmental and neurodegenerative diseases like autism and Alzheimer's.

Purpose of the Study:

  • To review the core functions of presynaptic boutons.
  • To highlight molecules mediating these functions and their link to human diseases.
  • To explore mechanisms of disease pathogenesis originating from bouton dysfunction.

Main Methods:

  • Literature review of recent studies on presynaptic bouton function.
  • Focus on molecular mechanisms and disease associations.
  • Discussion of potential pathogenic pathways.

Main Results:

  • Identified five core functions of presynaptic boutons.
  • Detailed specific molecules involved in bouton function.
  • Linked alterations in these molecules to synaptic communication defects.

Conclusions:

  • Presynaptic bouton integrity is essential for proper neural circuit function.
  • Molecular defects in boutons can lead to cognitive and behavioral impairments.
  • Understanding these mechanisms offers insights into neurodegenerative and neurodevelopmental disease.