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Related Concept Videos

The Synapse02:47

The Synapse

138.4K
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.
138.4K
Overview of Synapses01:25

Overview of Synapses

10.3K
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
10.3K
Chemical Synapses01:26

Chemical Synapses

9.0K
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...
9.0K
Chemical Synapses01:26

Chemical Synapses

12.5K
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...
12.5K
Electrical Synapses01:28

Electrical Synapses

11.9K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
11.9K
Synaptic Signaling01:09

Synaptic Signaling

7.1K
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...
7.1K

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Related Experiment Video

Updated: Apr 5, 2026

Presynaptically Silent Synapses Studied with Light Microscopy
11:02

Presynaptically Silent Synapses Studied with Light Microscopy

Published on: January 4, 2010

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Knowing a synapse when you see one.

Alain Burette1, Forrest Collman2, Kristina D Micheva3

  • 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill Chapel Hill, NC, USA.

Frontiers in Neuroanatomy
|August 19, 2015
PubMed
Summary
This summary is machine-generated.

New computational imaging methods enable quantitative analysis of individual synapses within brain networks. This breakthrough allows detailed study of synaptic structure, function, and development, advancing our understanding of neural complexity.

Keywords:
array tomographycortexelectron microscopyfluorescencemicroscopynetworksynapse

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

  • Neuroscience
  • Computational Biology
  • Imaging Technology

Background:

  • Synaptic networks are complex and diverse, crucial for brain function and adaptability.
  • Understanding individual synapses is key to deciphering neural network development and function.
  • Current imaging technologies limit quantitative analysis of single synapses and their network-wide patterns.

Purpose of the Study:

  • To provide an overview of novel computational imaging methods for single-synapse analysis.
  • To highlight challenges and opportunities in quantitative synapse detection and measurement.
  • To advance the study of synaptic networks in the mammalian brain.

Main Methods:

  • Overview of emerging computational imaging techniques.
  • Focus on quantitative detection of individual synapses.
  • Methods for measuring synapses across network-scale populations.

Main Results:

  • Computational imaging offers new possibilities for single-synapse analysis.
  • Quantitative studies of synapse characteristics across networks are becoming feasible.
  • Advances address limitations in current imaging technologies.

Conclusions:

  • New computational imaging methods are poised to revolutionize single-synapse analysis.
  • These techniques will enable a deeper understanding of synaptic network complexity.
  • The study of individual synapses is crucial for neuroscience research.