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Propagation of Action Potentials

Propagation of Action Potentials

The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...

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A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
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Electrochemical Gradient and Channel Proteins: An Overview

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An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
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Neuronal Communication

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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...

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Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
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Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...

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Updated: Mar 17, 2026

Subcellular Patch-clamp Recordings from the Somatodendritic Domain of Nigral Dopamine Neurons

Subcellular Patch-clamp Recordings from the Somatodendritic Domain of Nigral Dopamine Neurons

Published on: November 2, 2016

Nerve Conduction Through Dendrites via Proton Hopping.

Lemont B Kier¹

¹Center for the Study of Biological Complexity, Institute for Structural Biology, Drug Discovery and Development, Virginia Commonwealth University, Richmond VA 23298, United States.

Current Computer-Aided Drug Design

|July 27, 2016

Summary

This summary is machine-generated.

Proton hopping through water pathways in dendrites offers a new model for nerve impulse transmission. This mechanism explains information flow across nerve cells, including synapses and spines.

Keywords:

Dendrites neuron conduction neurons node of ranvier proton hopping synapse.

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Published on: November 2, 2016

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Published on: May 25, 2011

Area of Science:

Neuroscience
Biophysics

Background:

Previous studies explored proton hopping in nerve conduction across axons, soma, synapses, and nodes of Ranvier.
Proton hopping was identified as a key mechanism for information passage through these neural units.
Synapses were noted for projecting information from axons to dendrites and their spines.

Purpose of the Study:

To propose a comprehensive model of nerve function.
To elucidate the role of proton hopping in neural information transmission.
To integrate dendrites and their spines into the existing model of nerve conduction.

Main Methods:

Utilizing a proton hopping mechanism to model nerve impulse propagation.
Describing the continuum of neural impulses through the soma, following dendrites.
Incorporating water pathways as integral components of the proposed model.

Main Results:

A complete model of nerve function is proposed, emphasizing the role of dendrites.
Proton hopping via water pathways is identified as the mechanism for message transmission.
The extensive dendritic spines are highlighted for their capacity to carry unique neural messages.

Conclusions:

A comprehensive nerve system model is presented, incorporating dendrites and proton hopping.
This model provides a framework for understanding nerve function, particularly information processing in dendrites.
Further research is needed to validate and refine this proton hopping-based model of nerve conduction.