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Related Concept Videos

Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
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Related Experiment Video

Updated: Sep 19, 2025

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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Magnetic-Driven Torque-Induced Electrical Stimulation for Millisecond-Scale Wireless Neuromodulation.

Chao-Chun Cheng1, Li-Ling Chen1, Guan-Jhong Tseng1

  • 1Institute of Biomedical Engineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan(R.O.C.).

Advanced Healthcare Materials
|June 16, 2025
PubMed
Summary

This study introduces magnetic-driven torque-induced electrical stimulation (MagTIES) for wireless neuromodulation. MagTIES achieves millisecond-scale neuronal control in the brain, offering a minimally invasive alternative to traditional deep brain stimulation.

Keywords:
barium titanate nanoparticlesmagnetite nanodiscsmagnetoelectric stimulationmillisecond‐scale temporal precisionwireless neuromodulation

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Materials Science

Background:

  • Conventional deep brain stimulation (DBS) faces challenges with hardware implants and precise temporal control.
  • Nanoparticle-based wireless neuromodulation offers a minimally invasive alternative but requires millisecond-scale precision.
  • Existing magnetostriction-based systems have limitations in achieving rapid and controlled neuronal modulation.

Purpose of the Study:

  • To develop a novel wireless neuromodulation technique for precise temporal control of neuronal activity.
  • To introduce magnetic-driven torque-induced electrical stimulation (MagTIES) as a solution for millisecond-scale deep brain stimulation.
  • To demonstrate the efficacy of MagTIES in modulating neuronal activity in vitro and in vivo.

Main Methods:

  • Utilized magnetic nanodiscs to generate torque under alternating magnetic fields (AMFs).
  • Employed a torque-based magnetoelectric approach inducing a piezoelectric effect in nanoparticles.
  • Applied AMF (50 mT at ≈10 Hz) for MagTIES activation.

Main Results:

  • MagTIES successfully triggered neuronal activity in vitro and in vivo within milliseconds.
  • Demonstrated precise temporal control of neuronal activity in the amygdala.
  • Showcased the ability to fine-tune amygdala brain oscillations by modulating AMF frequency.

Conclusions:

  • MagTIES offers high spatial and temporal precision for neuromodulation with minimal invasiveness.
  • This innovative approach advances neuroscience research and has potential therapeutic applications.
  • MagTIES overcomes limitations of traditional magnetostriction-based neuromodulation systems.