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Updated: May 26, 2026

A MRI-Based Toolbox for Neurosurgical Planning in Nonhuman Primates
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High resolution 3T fMRI in anesthetized monkeys.

Palma Pró-Sistiaga1, Franck Lamberton, Thomas Boraud

  • 1GIP Cyceron, Campus Jules Horowitz, Bd. Henri Becquerel, 14074 Caen, France. Pro@cyceron.fr

Journal of Neuroscience Methods
|January 11, 2012
PubMed
Summary

This study demonstrates the feasibility of using 3T MRI for functional brain imaging in lightly anesthetized monkeys. The brain oxygen level dependent (BOLD) fMRI signal in Macaca mulatta monkeys provides reproducible data for neural pathway analysis.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Primate Research

Background:

  • Limited functional 3T MRI studies exist for anesthetized monkeys.
  • Previous anesthetized preparations were considered unreliable for extra-primary sensory cortical regions.

Purpose of the Study:

  • To assess the feasibility and applications of brain oxygen level dependent (BOLD) functional MRI (fMRI) in lightly anesthetized Macaca mulatta monkeys.
  • To optimize Echo Planar Imaging (EPI) sequences for visual stimulation paradigms at 3T.

Main Methods:

  • Utilized a 3T clinical MRI scanner with commercially available coils and sequences.
  • Administered light sevoflurane anesthesia and curare to Macaca mulatta monkeys.
  • Acquired various MRI sequences including T1 scout, gray matter double inversion recovery, gradient echo, and EPI sequences.

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Last Updated: May 26, 2026

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Simultaneous fMRI and Electrophysiology in the Rodent Brain
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Main Results:

  • Achieved a satisfactory signal-to-noise ratio with limited standard deviation in anesthetized monkeys.
  • Demonstrated significant BOLD signal changes in response to visual stimulation.
  • Successfully applied spatially resolved fMRI in higher visual areas.

Conclusions:

  • 3T MRI is a valuable tool for analyzing neural pathways in anesthetized macaque brains.
  • This methodology offers a stable, reproducible alternative to awake monkey studies, avoiding extensive training.
  • The technique is suitable for future functional studies in non-human primates.