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Related Concept Videos

Chemical Synapses01:26

Chemical Synapses

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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.
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...
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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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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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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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Synaptic Signaling01:09

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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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Postsynaptic Potential (PSP)01:32

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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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Updated: Mar 19, 2026

Preparation of Synaptic Plasma Membrane and Postsynaptic Density Proteins Using a Discontinuous Sucrose Gradient
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Puzzling out presynaptic differentiation.

Maria J Pinto1,2, Ramiro D Almeida1,3,4

  • 1CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.

Journal of Neurochemistry
|June 18, 2016
PubMed
Summary
This summary is machine-generated.

New presynaptic terminals form when axonal transport delivers pre-assembled packets. Postsynaptic factors then trigger clustering and organization, crucial for brain function.

Keywords:
central nervous systempresynaptic differentiationpresynaptic terminalsynapse formation

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Synaptic connections are vital for nervous system function.
  • Presynaptic differentiation involves assembling new presynaptic units.
  • Accurate synapse formation is essential during neural development.

Purpose of the Study:

  • To review cellular and molecular mechanisms of presynaptic differentiation in the CNS.
  • To identify instructive factors and intracellular processes in presynaptic terminal assembly.
  • To detail the formation of new presynaptic terminals.

Main Methods:

  • Review of recent advances in presynaptic differentiation research.
  • Focus on cellular and molecular aspects of synapse formation.
  • Emphasis on axonal transport and postsynaptic signaling.

Main Results:

  • Presynaptic assembly is triggered by postsynaptic factors (soluble molecules, cell adhesion complexes).
  • Pre-assembled packets are trafficked via axonal transport to form presynaptic boutons.
  • Synaptogenic factors activate intra-axonal mediators for clustering and organization.

Conclusions:

  • Presynaptic differentiation is a complex process involving coordinated signaling.
  • Understanding these mechanisms is key to addressing synaptic dysfunction in brain diseases.
  • This review consolidates current knowledge on presynaptic terminal formation.