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Related Experiment Video

Updated: Jul 1, 2025

Chronic Implantation of Whole-cortical Electrocorticographic Array in the Common Marmoset
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Decomposing cortical activity through neuronal tracing connectome-eigenmodes in marmosets.

Jie Xia1,2, Cirong Liu3, Jiao Li1,2

  • 1The Clinical Hospital of Chengdu Brain Science Institute, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 611731, P.R. China.

Nature Communications
|March 14, 2024
PubMed
Summary

This study uses graph signal processing to analyze marmoset brain connectivity, revealing how structural connections influence brain activity and identifying a gradient of coupling across the cortex. These findings offer insights into the brain

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Connectomics

Background:

  • Understanding the link between brain structure and function is crucial for deciphering neural processing.
  • Monosynaptic connectivity's role in shaping cortical activity remains complex and challenging to investigate.

Purpose of the Study:

  • To investigate the anatomical-functional relationship in primate brains.
  • To explore how neuronal-tracing connectome eigenmodes constrain cortical activity.

Main Methods:

  • Applied graph signal processing to decompose the neuronal-tracing connectome of marmoset brains into eigenmodes.
  • Utilized resting-state functional MRI data to derive cortical activity.
  • Analyzed the relationship between cellular connectome eigenmodes and cortical activity patterns.

Main Results:

  • Cellular connectome eigenmodes effectively constrained cortical activity, revealing a patterned cellular-functional decoupling.
  • Identified a spatial gradient from coupled dorsal-posterior to decoupled ventral-anterior cortices.
  • Demonstrated that these eigenmodes recapitulate micro-structural profiles and macro-scale cortical organization.

Conclusions:

  • Marmoset-derived eigenmodes can potentially infer spontaneous cortical activity and functional connectivity in homologous human brain areas.
  • Connectomic constraints show potential for generalization across species.
  • Findings illuminate how neuronal-tracing connectome eigenmodes shape cortical activity and enhance understanding of the brain's anatomical-functional relationship.