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Updated: Mar 18, 2026

Chronic Implantation of Whole-cortical Electrocorticographic Array in the Common Marmoset

Chronic Implantation of Whole-cortical Electrocorticographic Array in the Common Marmoset

Published on: February 1, 2019

Frontoparietal Functional Connectivity in the Common Marmoset.

Maryam Ghahremani^1,2, R Matthew Hutchison³, Ravi S Menon^1,2

¹Graduate Program in Neuroscience, University of Western Ontario, Canada.

Cerebral Cortex (New York, N.Y. : 1991)

|July 14, 2016

Summary

The common marmoset brain shows functional connectivity similar to macaques and humans, particularly in frontoparietal networks. This study maps key brain regions for saccade control in marmosets, aiding future research.

Keywords:

frontal eye fields functional connectivity oculomotor system primates superior colliculus

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Last Updated: Mar 18, 2026

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Serial Two-Photon Tomography of the Whole Marmoset Brain for Neuroanatomical Analyses

Serial Two-Photon Tomography of the Whole Marmoset Brain for Neuroanatomical Analyses

Published on: January 17, 2025

Area of Science:

Neuroscience
Comparative Neuroanatomy
Primate Brain Imaging

Background:

The common marmoset (Callithrix jacchus) is emerging as a key transgenic primate model.
Limited knowledge exists on marmoset functional brain connectivity compared to macaques.
Understanding marmoset brain organization is crucial for its use in neuroscience research.

Purpose of the Study:

To investigate and compare functional brain organization in marmosets, macaques, and humans.
To specifically examine the saccade system's functional connectivity.
To identify major functional hubs in the marmoset brain.

Main Methods:

Resting-state ultra-high-field functional magnetic resonance imaging (fMRI) in anesthetized marmosets and macaques, and awake humans.
Exploratory independent component analysis (ICA) to identify resting-state networks.
Seed-region analyses focusing on the superior colliculus (SC) and betweenness centrality for hub identification.

Main Results:

Eight resting-state networks were identified in marmosets, showing significant overlap with macaque and human networks, including a frontoparietal network.
Marmoset superior colliculus (SC) exhibited strong frontal connectivity with area 8aD, mirroring frontal eye fields in macaques and humans.
Areas 8aD, 8aV, PG, TPO, TE2, and TE3 were identified as critical functional hubs in the marmoset brain.

Conclusions:

The findings support an evolutionarily conserved frontoparietal system across primates.
This study provides a foundational map of functional connectivity in the marmoset brain.
Results offer a basis for future invasive neurophysiological studies in marmoset visual and saccade systems.