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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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Modeling the Functional Network for Spatial Navigation in the Human Brain

Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

Neural circuits for goal-directed navigation across species.

Jayeeta Basu¹, Katherine Nagel²

¹Neuroscience Institute, New York University Langone Health, New York, NY 10016, USA; Department of Neuroscience and Physiology, New York University Grossman School of Medicine, New York, NY 10016, USA; Department of Psychiatry, New York University Grossman School of Medicine, New York, NY 10016, USA; Center for Neural Science, New York University, New York, NY 10003, USA.

Trends in Neurosciences

|October 11, 2024

Summary

Vertebrate hippocampus and arthropod central complex both support navigation by creating internal spatial maps. Comparing these brain regions reveals conserved and divergent neural strategies for spatial computation across species.

Keywords:

central complex goal encoding hippocampus insect place cells rodents

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Area of Science:

Neuroscience
Comparative Biology
Animal Behavior

Background:

Goal-directed navigation is essential for survival across species, enabling resource acquisition and shelter seeking.
In vertebrates, the hippocampus is key for memory-guided navigation, while in arthropods, the central complex serves a similar role.
Research is increasingly highlighting both parallels and divergences in the organization and function of these distinct brain structures.

Purpose of the Study:

To review and compare how the vertebrate hippocampus and arthropod central complex support goal-directed navigation.
To examine the internal representations of space and goals constructed by these brain regions.
To explore input pathways and their encoding of spatial and non-spatial information.

Main Methods:

Literature review of current knowledge on hippocampal and central complex function in navigation.
Analysis of input pathways, including the medial and lateral entorhinal cortex (vertebrates) and columnar and tangential neurons (insects).
Comparative analysis of spatial encoding principles and behavioral capabilities across different clades.

Main Results:

Both the hippocampus and central complex build internal representations crucial for navigation.
Distinct input pathways encode spatial and non-spatial information differently in vertebrates and arthropods.
Similarities and differences in spatial encoding strategies exist across these diverse animal groups.

Conclusions:

Comparative studies of navigation circuits offer insights into neural computation.
Understanding conserved and divergent mechanisms can illuminate the neural basis of spatial navigation.
Future experimental approaches should focus on cross-species comparisons of coding principles and behaviors.