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Related Experiment Video

Updated: Jun 30, 2025

Deep Brain Stimulation with Simultaneous fMRI in Rodents
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Temporal interference stimulation targets deep primate brain.

Ruobing Liu1, Guanyu Zhu2, Zhengping Wu3

  • 1CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, PR China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, PR China.

Neuroimage
|March 20, 2024
PubMed
Summary
This summary is machine-generated.

Temporal interference (TI) stimulation successfully modulated neural activity in deep brain regions of non-human primates. This non-invasive technique showed promise for treating movement disorders and offers a precise method for deep brain modulation.

Keywords:
Deep brain stimulationIntracranial eegTemporal interferenceelectric fieldmodel-based simulation

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Medical Physics

Background:

  • Temporal interference (TI) stimulation is a novel non-invasive brain modulation technique.
  • Previous studies showed TI's efficacy in mice, but its applicability to larger brains and deep penetration under safety currents remained unverified.
  • Lack of empirical electrophysiological data from actual brains limited understanding and application of TI.

Purpose of the Study:

  • To measure the spatiotemporal properties of TI-induced electric fields in the rhesus monkey brain.
  • To validate the effects of TI on human motor disorders.
  • To provide empirical evidence for TI's potential in large-brain deep region modulation.

Main Methods:

  • Stereo-electroencephalography (SEEG) depth electrodes were implanted in two rhesus monkeys for electric field measurements.
  • TI stimulation was applied to anesthetized monkeys and human patients with motor disorders.
  • Computational electric field simulations were performed and compared with empirical recordings.

Main Results:

  • Empirical measurements confirmed that TI electric fields in deep brain regions can achieve sufficient magnitude for neural modulation.
  • TI stimulation induced subthreshold modulation effects on neural signals in monkeys.
  • Patients with motor disorders showed improvement after TI stimulation.

Conclusions:

  • This study provides the first systematic measurement of TI electric fields in living non-human primates.
  • TI stimulation demonstrates potential as a focal and precise method for modulating neural activity in deep regions of large brains.
  • TI holds promise for future therapeutic applications in neuropsychiatric disorders.