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Related Experiment Video

Updated: Jul 13, 2025

Author Spotlight: Low-Cost Electroencephalographic Recording System Combined with a Millimeter-Sized Coil to Transcranially Stimulate the Mouse Brain In Vivo
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High-Performance Magnetic-core Coils for Targeted Rodent Brain Stimulations.

Hedyeh Bagherzadeh1, Qinglei Meng2, Hanbing Lu2

  • 1Department of Computer Science and Electrical Engineering, University of Maryland, Baltimore County, Baltimore, MD 21250, USA.

BME Frontiers
|October 18, 2023
PubMed
Summary

Researchers developed a novel rodent coil for precise brain stimulation, enhancing focality and reducing energy needs for treating neuropsychiatric disorders and studying brain mechanisms.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Medical Physics

Background:

  • Transcranial magnetic stimulation (TMS) is crucial for neuropsychiatric disorder treatment and brain research.
  • Preclinical rodent models are vital for understanding TMS mechanisms and therapeutic potential.
  • Existing TMS coils lack the necessary focality for precise deep brain stimulation in small animals.

Purpose of the Study:

  • To develop a novel rodent coil design with improved focality for targeted brain stimulation.
  • To enhance the penetration depth and precision of TMS in small rodent brains.
  • To create a more effective tool for preclinical research in neuroscience and neuropsychiatry.

Main Methods:

  • Incorporated ferromagnetic cores into a novel angle-tuned coil design.
  • Utilized numerical simulations to optimize coil geometry and performance.
  • Conducted experimental electric field measurements for validation and optimization.

Main Results:

  • The novel coil system achieved a significantly smaller stimulation spot size and faster electric field decay.
  • Ferromagnetic cores reduced energy requirements for rodent brain stimulation by up to 60%.
  • Experimental validation confirmed simulated results, demonstrating targeted motor cortex activation and limb excitation.

Conclusions:

  • The newly developed rodent coils offer enhanced focality and precision for brain stimulation.
  • These coils are suitable tools for targeted deep brain stimulation in preclinical research.
  • The improved design facilitates mechanistic studies and therapeutic development for neuropsychiatric disorders.