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The Role of Ion Channels in Neuronal Computation

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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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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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Related Experiment Video

Updated: Mar 21, 2026

Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices

Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices

Published on: March 15, 2018

Sodium pump organization in dendritic spines.

Hans Blom¹, Kristoffer Bernhem², Hjalmar Brismar³

¹Royal Institute of Technology, Department of Applied Physics, Roslagstullsbacken 21, Stockholm 10691, Sweden; Science for Life Laboratory, Advanced Light Microscopy Facility, Tomtebodavägen 23A, Solna 17165, Sweden.

|May 14, 2016

Summary

Super-resolution microscopy reveals nanoscale protein distribution in neurons. Quantifying [Formula: see text]-ATPase (sodium pump) reveals critical factors influencing accurate measurements for understanding neuronal energy regulation.

Keywords:

dendritic spine photoactivated localization microscopy sodium pump stimulated emission depletion microscopy

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Analysis of Dendritic Spine Morphology in Cultured CNS Neurons

Analysis of Dendritic Spine Morphology in Cultured CNS Neurons

Published on: July 13, 2011

Area of Science:

Neuroscience
Cell Biology
Biophysics

Background:

Super-resolution microscopy techniques like PALM/STORM and STED enable nanoscale imaging.
Understanding protein distribution in dendritic spines is crucial for neuronal function.
The [Formula: see text]-ATPase (sodium pump) is vital for neuronal ion homeostasis and energy balance.

Purpose of the Study:

To apply super-resolution microscopy to investigate the nanoscale distribution of the [Formula: see text]-ATPase in dendritic spines.
To assess the accuracy of protein quantification using different nanoscopy methods.
To understand the impact of quantification variations on neuronal sodium regulation and energy consumption.

Main Methods:

Utilized super-resolution microscopy modalities (PALM/STORM, STED).
Focused on quantifying the amount of [Formula: see text]-ATPase.
Analyzed the influence of labeling strategies, sample preparation, and imaging techniques on quantification.

Main Results:

Demonstrated the feasibility of applying super-resolution microscopy to study postsynaptic protein distribution.
Identified critical factors affecting the accuracy of [Formula: see text]-ATPase quantification.
Provided comparative data across different nanoscopy approaches.

Conclusions:

Accurate quantification of [Formula: see text]-ATPase is essential for understanding neuronal homeostasis.
Labeling strategies, sample analysis, and imaging methods significantly impact quantification results.
Findings contribute to a better understanding of neuronal energy consumption and sodium regulation.