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Electromagnetic Interference-Shielded Graphene-Copper Neural Interface for Real-Time Electrophysiology under Magnetic

Myoungjae Oh1,2, Enji Kim1,2, Seo-Hyun Choi2

  • 1Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.

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|November 4, 2025
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Summary
This summary is machine-generated.

Researchers developed an electromagnetic interference-shielded neural probe for real-time brain recordings during magnetic neuromodulation. This technology enables high-fidelity monitoring of neural circuits, advancing deep-brain stimulation research.

Keywords:
bioelectronicselectromagnetic interference shieldingmagnetic neuromodulationneural interfaceneural recording

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Materials Science

Background:

  • Magnetic neuromodulation offers wireless deep-brain stimulation but faces challenges with electromagnetic interference (EMI) affecting neural recordings.
  • Conventional metal electrodes are susceptible to EMI, hindering accurate electrophysiological monitoring during stimulation.
  • Real-time investigation of brain activity during magnetic neuromodulation is crucial for understanding neural dynamics.

Purpose of the Study:

  • To develop an electromagnetic interference-shielded neural probe for high-fidelity in vivo electrophysiological recordings during magnetic neuromodulation.
  • To enable simultaneous monitoring of neural activity in deep-brain regions during targeted magnetic stimulation.
  • To investigate the neural circuit mechanisms underlying motivated behaviors using this novel recording platform.

Main Methods:

  • Integration of graphene electrodes with copper shielding layers to minimize EMI.
  • Development of a neural probe design to suppress broadband electromagnetic interference.
  • Simultaneous electrophysiological recording from the lateral hypothalamus area (LHA) and ventral tegmental area (VTA) in freely moving mice.
  • Application of neuron-specific magneto-mechanical stimulation of LHA GABAergic neurons.

Main Results:

  • The EMI-shielded probe achieved stable, high-fidelity neural recordings under magnetic stimulation.
  • Activation of the LHA-VTA circuit was observed during motivated feeding tasks.
  • Key indicators of circuit activation included elevated firing rates, increased β-band oscillations, and enhanced inter-regional synchrony.
  • Demonstrated the probe's capability for real-time monitoring of neural dynamics during deep-brain stimulation.

Conclusions:

  • The developed EMI-shielded neural probe is a robust platform for real-time wireless magnetic deep-brain neuromodulation.
  • This technology overcomes EMI limitations, enabling accurate neural recordings during stimulation.
  • Opens new avenues for mechanistic studies and therapeutic development in neuroscience and neurology.