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Related Concept Videos

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...
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.
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...
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...
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

Updated: Jul 20, 2026

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals
08:38

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals

Published on: May 25, 2011

Presynaptic Ca2+ channels--integration centers for neuronal signaling pathways.

Rhian M Evans1, Gerald W Zamponi

  • 1Hotchkiss Brain Institute, Department of Physiology and Biophysics, Faculty of Medicine, University of Calgary, Calgary, Alberta T2N 4N1, Canada.

Trends in Neurosciences
|September 1, 2006
PubMed
Summary

Voltage-gated calcium channels, crucial for neurotransmitter release, include P/Q-type and N-type channels. Their regulation involves complex signaling pathways and protein interactions, influencing nerve terminal function.

More Related Videos

Acute Dissociation of Lamprey Reticulospinal Axons to Enable Recording from the Release Face Membrane of Individual Functional Presynaptic Terminals
12:01

Acute Dissociation of Lamprey Reticulospinal Axons to Enable Recording from the Release Face Membrane of Individual Functional Presynaptic Terminals

Published on: October 1, 2014

Related Experiment Videos

Last Updated: Jul 20, 2026

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals
08:38

Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals

Published on: May 25, 2011

Acute Dissociation of Lamprey Reticulospinal Axons to Enable Recording from the Release Face Membrane of Individual Functional Presynaptic Terminals
12:01

Acute Dissociation of Lamprey Reticulospinal Axons to Enable Recording from the Release Face Membrane of Individual Functional Presynaptic Terminals

Published on: October 1, 2014

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Voltage-gated calcium channels mediate neurotransmitter release from presynaptic nerve terminals.
  • P/Q-type and N-type calcium channels are the primary subtypes in these terminals, with varied expression patterns.
  • These channels are regulated by common mechanisms and function within signaling complexes for precise control.

Purpose of the Study:

  • To provide a comprehensive overview of the molecular and cellular mechanisms regulating calcium channels.
  • To explain how cellular signaling pathways are integrated at the level of the calcium channel protein.

Main Methods:

  • Literature review of molecular and cellular mechanisms.
  • Analysis of signaling pathways and protein interactions.

Main Results:

  • Calcium influx via voltage-gated calcium channels is critical for neurotransmitter release.
  • Differential expression of P/Q-type and N-type channels underlies distinct physiological and pathological roles.
  • Common regulatory mechanisms and integrated signaling complexes govern channel activity and targeting.

Conclusions:

  • Understanding calcium channel regulation is key to comprehending synaptic transmission.
  • Signaling pathways and protein interactions are vital for precise control of calcium channel function in nerve terminals.