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Related Experiment Video

Updated: Apr 12, 2026

Brain State-dependent Brain Stimulation with Real-time Electroencephalography-Triggered Transcranial Magnetic Stimulation
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Magnetoelectric 'spin' on stimulating the brain.

Rakesh Guduru1,2, Ping Liang3, J Hong4

  • 1Department of Cellular Biology & Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA.

Nanomedicine (London, England)
|May 9, 2015
PubMed
Summary

Magnetoelectric nanoparticles can directly control neural activity by coupling electric fields with magnetic fields. This breakthrough offers a new method for deep brain stimulation and understanding brain function.

Keywords:
magnetoelectric nanoparticlesnanoengineering the brainnoninvasive brain stimulation

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Area of Science:

  • Biophysics
  • Neuroscience
  • Materials Science

Background:

  • The brain's intrinsic electric fields are crucial for neural activity.
  • Controlling these fields non-invasively is a significant challenge in neuroscience.

Purpose of the Study:

  • To investigate if magnetoelectric nanoparticles can mediate the coupling of neural electric fields with external magnetic fields.
  • To demonstrate a novel method for modulating brain activity.

Main Methods:

  • CoFe2O4-BaTiO3 nanoparticles were administered intravenously to mice.
  • A direct current (d.c.) field gradient was used to facilitate blood-brain barrier penetration.
  • Electroencephalography (EEG) measured neural waveform modulation by an alternating current (a.c.) magnetic field.

Main Results:

  • Magnetoelectric nanoparticles successfully modulated intrinsic neural electric fields.
  • The modulated signal strength was comparable to naturally occurring neural activity.

Conclusions:

  • This study demonstrates a novel pathway for controlling intrinsic electric fields deep within the brain using multifunctional nanoparticles.
  • This opens possibilities for advanced neuromodulation techniques.