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Related Concept Videos

Synaptic Signaling01:12

Synaptic Signaling

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.
Synaptic Signaling01:09

Synaptic Signaling

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...
Integration of Synaptic Events01:28

Integration of Synaptic Events

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...
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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Related Experiment Video

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Synthesis of a Deuterated Standard for the Quantification of 2-Arachidonoylglycerol in Caenorhabditis elegans
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Synthesis of a Deuterated Standard for the Quantification of 2-Arachidonoylglycerol in Caenorhabditis elegans

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Endocannabinoid signaling and synaptic function.

Pablo E Castillo1, Thomas J Younts, Andrés E Chávez

  • 1Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA. pablo.castillo@einstein.yu.edu

Neuron
|October 9, 2012
PubMed
Summary
This summary is machine-generated.

Endocannabinoids regulate brain function by activating cannabinoid receptors. Recent research reveals complex and diverse mechanisms of endocannabinoid signaling at synapses, expanding our understanding of neural plasticity.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Neuropharmacology

Background:

  • Endocannabinoids are endogenous lipid signaling molecules.
  • They modulate synaptic function by activating cannabinoid receptors (CB1R) in the central nervous system.
  • These signaling pathways influence neural functions and behaviors.

Purpose of the Study:

  • To review recent advances in synaptic endocannabinoid signaling in the mammalian brain.
  • To highlight the complexity and diversity of endocannabinoid-mediated mechanisms.
  • To explore interactions with other neuromodulatory systems.

Main Methods:

  • Review of current scientific literature.
  • Analysis of experimental data on endocannabinoid function.
  • Synthesis of findings on synaptic plasticity and signaling pathways.

Main Results:

  • Endocannabinoids are crucial regulators of both excitatory and inhibitory synaptic plasticity.
  • Retrograde signaling is a primary mechanism, but nonretrograde signaling also occurs.
  • The endocannabinoid system exhibits plasticity and interacts with other signaling networks.

Conclusions:

  • Endocannabinoid signaling is mechanistically diverse and more complex than previously understood.
  • These findings underscore the significant role of endocannabinoids in regulating brain function.
  • Further research is needed to fully elucidate the intricate endocannabinoid system.