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Related Experiment Video

Updated: Apr 12, 2026

In Vivo Intracerebral Stereotaxic Injections for Optogenetic Stimulation of Long-Range Inputs in Mouse Brain Slices

In Vivo Intracerebral Stereotaxic Injections for Optogenetic Stimulation of Long-Range Inputs in Mouse Brain Slices

Published on: September 20, 2019

Between-network connectivity occurs in brain regions lacking layer IV input.

Korey P Wylie¹, Eugene Kronberg¹, Keeran Maharajh¹

¹Department of Psychiatry, University of Colorado Anschutz Medical Campus, Bldg. 500, Mail Stop F546, 13001 East 17th Place, Aurora, CO, 80045, USA.

|May 17, 2015

Summary

This summary is machine-generated.

Researchers identified brain regions crucial for information integration using a novel data-driven method. Areas with high between-network connectivity (BNC), like the anterior insula, may facilitate cross-network communication due to unique cytoarchitecture.

Keywords:

Cytology Independent components analysis Paralimbic Resting state fMRI

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In Vivo Intracerebral Stereotaxic Injections for Optogenetic Stimulation of Long-Range Inputs in Mouse Brain Slices

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Published on: September 20, 2019

Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings

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Published on: August 18, 2020

Area of Science:

Neuroscience
Brain Connectivity
Computational Neuroscience

Background:

Understanding large-scale neural network connectivity is crucial for cognitive function.
Cortical circuitry and cytoarchitecture influence inter-network communication.
Previous studies suggest a link between macroscopic connectivity and microscopic brain structure.

Purpose of the Study:

To develop a data-driven approach for identifying brain subregions involved in information integration.
To investigate the relationship between between-network connectivity (BNC) and regional cytoarchitecture.
To identify specific brain regions that act as hubs for inter-network communication.

Main Methods:

Developed a novel method to calculate between-network connectivity (BNC) for all fMRI voxels.
Utilized functional networks identified via independent components analysis.
Compared BNC results with known regional cytoarchitectural patterns, focusing on cortical layer IV.

Main Results:

High BNC was observed in paralimbic subregions, specifically the anterior insula and dorsal posterior cingulate cortex.
These high-BNC regions exhibit agranular or dysgranular cytoarchitecture with absent or disrupted cortical layer IV.
The absence of cortical layer IV correlates with a potential role in inter-network information exchange.

Conclusions:

The anterior insula and dorsal posterior cingulate cortex are identified as key integration subregions.
The unique cytoarchitecture of these regions, particularly the lack of cortical layer IV, may facilitate inter-network communication.
This suggests that specific microstructural features are organizational characteristics of brain hubs serving as inter-network communication channels.