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Neuron Structure

Neuron Structure

Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
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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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The Synapse

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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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Related Experiment Video

Updated: Aug 29, 2025

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes

Published on: October 4, 2018

Synaptic Communication in Diverse Astrocytic Connectivity: A Computational Model.

Jhunlyn Lorenzo, Stephan Binczak, Sabir Jacquir

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|September 10, 2022

Summary

Astrocytes actively modulate neural communication through intercellular calcium waves. Their connectivity degree is crucial for controlling extrasynaptic glutamate and maintaining synaptic signaling integrity.

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Area of Science:

Neuroscience
Computational Neuroscience
Astrocyte Biology

Background:

Astrocytes are increasingly recognized as active participants in neural communication.
They modulate tripartite synapses and influence signaling via intercellular calcium waves (ICWs).
Heterogeneity in astrocyte connectivity leads to diverse signaling patterns and impacts on synaptic communication.

Purpose of the Study:

To investigate the impact of astrocytic connectivity on synaptic communication.
To develop a functional model of a neuron-astrocyte network.

Main Methods:

A computational model simulating neuron-astrocyte networks was developed.
The model incorporated tripartite synaptic interactions, gap-junction coupled astrocytes, and calcium dynamics.
Network topology and astrocytic connectivity were varied.

Main Results:

Astrocytic connectivity significantly influences spatiotemporal signaling patterns.
The degree of astrocytic connectivity is critical for regulating extrasynaptic glutamate levels.
Maintaining appropriate extrasynaptic glutamate is essential to prevent synaptic communication disruption.

Conclusions:

Astrocytic connectivity is a key factor in fine-tuning neural communication.
The model highlights the importance of astrocyte network structure in synaptic function.
Understanding astrocytic connectivity is vital for comprehending brain signaling mechanisms.