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Modulation of Local Field Potentials in the Deep Brain of Minipigs Through Transcranial Temporal Interference
Hsiao-Chun Lin1, Yi-Hui Wu1, Ming-Dou Ker2
1Biomedical Electronics Translational Research Center, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.
Summary
Transcranial temporal interference stimulation (tTIS) effectively modulates deep brain local field potentials (LFPs) in an intensity-dependent manner. This novel neuromodulation technique shows promise for noninvasive brain stimulation applications.
Area of Science:
- Neuroscience
- Biomedical Engineering
Background:
- Transcranial temporal interference stimulation (tTIS) is an emerging noninvasive neuromodulation technique.
- Direct electrophysiological evidence of tTIS effects on deep brain activity is limited.
Purpose of the Study:
- To investigate the impact of tTIS on deep brain local field potentials (LFPs).
- To provide electrophysiological evidence for tTIS efficacy in modulating neural activity.
Main Methods:
- Minipigs were implanted with electrodes in the subthalamic nucleus.
- tTIS was applied using scalp electrodes with varying intensities and carrier frequencies.
- Stimulus-response relationships and entrainment of oscillations were analyzed.
Main Results:
- tTIS modulated deep brain LFPs in an intensity-dependent manner.
- Carrier frequencies of 1-2 kHz and envelope oscillations <200 Hz were most effective.
- Right-sided stimulation showed a dominant effect, with inconsistent responses to intensity ratio adjustments.
Conclusions:
- tTIS can effectively regulate deep brain LFPs.
- tTIS demonstrates potential as a tool for noninvasive neuromodulation.
