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Related Experiment Video

Updated: Jun 27, 2026

Simultaneous fMRI and Electrophysiology in the Rodent Brain
08:22

Simultaneous fMRI and Electrophysiology in the Rodent Brain

Published on: August 19, 2010

Functional brain mapping at 9.4T using a new MRI-compatible electrode chronically implanted in rats.

Jeff F Dunn1, Ursula I Tuor, Jonn Kmech

  • 1Experimental Imaging Centre, Department of Radiology, Hotchkiss Brain Institute, University of Calgary, Alberta, Canada. dunnj@ucalgary.ca

Magnetic Resonance in Medicine
|December 20, 2008
PubMed
Summary

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Researchers developed novel carbon fiber electrodes for brain stimulation during MRI scans. These biocompatible electrodes enable acute and chronic deep brain stimulation studies, even at high field strengths like 9.4T.

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Medical Imaging

Background:

  • High-strength MRI (9.4T) poses challenges for foreign object implantation due to susceptibility artifacts.
  • Acute and chronic brain stimulation is crucial for studying neurological disorders like epilepsy and movement disorders.

Purpose of the Study:

  • To develop and characterize novel carbon fiber-based electrodes for safe and effective brain stimulation within MRI environments.
  • To evaluate the utility of these electrodes for functional activation studies at 9.4T.

Main Methods:

  • Fabrication of biocompatible carbon fiber electrodes.
  • Testing electrode performance and artifact generation at 9.4T MRI.
  • In vivo stimulation studies to assess functional brain activation and connectivity.

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Deep Brain Stimulation with Simultaneous fMRI in Rodents
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Deep Brain Stimulation with Simultaneous fMRI in Rodents

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Brain Mapping Using a Graphene Electrode Array
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Related Experiment Videos

Last Updated: Jun 27, 2026

Simultaneous fMRI and Electrophysiology in the Rodent Brain
08:22

Simultaneous fMRI and Electrophysiology in the Rodent Brain

Published on: August 19, 2010

Deep Brain Stimulation with Simultaneous fMRI in Rodents
11:09

Deep Brain Stimulation with Simultaneous fMRI in Rodents

Published on: February 15, 2014

Brain Mapping Using a Graphene Electrode Array
10:32

Brain Mapping Using a Graphene Electrode Array

Published on: October 20, 2023

Main Results:

  • Carbon fiber electrodes demonstrated biocompatibility for chronic implantation.
  • Successful acute and chronic stimulation was achieved at 9.4T with minimal artifacts.
  • Brain activation was observed both near and distant (contralateral) to the stimulation site.
  • Negative activation sites were identified during direct stimulation and kindling-associated seizures.

Conclusions:

  • Carbon fiber electrodes are suitable for MRI-guided acute and chronic brain stimulation.
  • These electrodes facilitate the study of brain-wide functional connectivity and network dynamics.
  • The technology advances research into epilepsy, movement disorders, and behavioral conditions using high-field MRI.