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Neural Circuits

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...

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Related Experiment Video

Updated: Apr 27, 2026

Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling

Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling

Published on: September 14, 2015

Transneuronal circuit analysis with pseudorabies viruses.

J Patrick Card¹, Lynn W Enquist²

¹Department of Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania.

Current Protocols in Neuroscience

|July 3, 2014

Summary

Understanding neural networks relies on mapping neuron connections. Advances in viral tracing methods now offer powerful tools for visualizing these neural pathways and their functions.

Keywords:

herpesvirus rabies transgene expression transneuronal

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Last Updated: Apr 27, 2026

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Area of Science:

Neuroscience
Molecular Biology
Virology

Background:

Understanding nervous system function requires defining neuronal connections.
Developing methods for mapping neural networks is a key area of neuroscience research.
Transneuronal spread of neurotropic viruses is a primary technique for identifying synaptic connections.

Purpose of the Study:

To review advances in viral tracing technology.
To discuss the application of these methods for functional dissection of neural networks.

Main Methods:

Utilizing the natural ability of viruses to invade, replicate, and spread between connected neurons.
Leveraging advancements in understanding viral life cycles and genome manipulation.
Employing engineered viruses for directional spread and transgene expression.

Main Results:

Viral tracing methods have significantly improved since their inception in the 1970s.
Enhanced understanding of viral biology allows for precise control over viral spread.
Genetic manipulation of viruses enables targeted neural circuit mapping and functional studies.

Conclusions:

Viral tracing is an indispensable tool for dissecting neural circuitry.
Ongoing advancements in viral technology continue to enhance our ability to study neural networks.
These refined techniques are crucial for understanding nervous system function.