Equipment for Repetitive Transcranial Magnetic Stimulation
IEEE Transactions on Biomedical Circuits and Systems
|March 17, 2020
Summary
Repetitive transcranial magnetic stimulation (rTMS) can alter brain activity. Different stimulation durations impact cortical and subcortical zones, suggesting pulse number is key for effective rTMS protocols.
Area of Science:
- Neuroscience
- Neuromodulation
- Biomedical Engineering
Background:
- Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive neuromodulation technique for neurological disorders.
- The precise brain mechanisms of rTMS effects require further elucidation.
- Optimizing rTMS protocols necessitates understanding its impact on brain activity.
Purpose of the Study:
- To design and implement a system for applying rTMS in small animals.
- To investigate the effects of varying rTMS dosages on rat brain metabolic activity.
- To identify optimal parameters for rTMS application in research settings.
Main Methods:
- A half-bridge converter controlled by a microcontroller was designed to generate pulsed magnetic fields for rTMS.
- A specialized magnetic transducer was developed to focus the magnetic field on specific brain areas in rodents.
- Five different rTMS dosages were applied to rats to compare effects on brain metabolic activity.
Main Results:
- One day of rTMS stimulation enhanced metabolic activity in cortical areas.
- Three days of rTMS stimulation affected both cortical and subcortical brain zones.
- Extending stimulation to seven days did not yield additional modifications in metabolic activity.
Conclusions:
- The number of pulses delivered is a critical parameter in rTMS protocols.
- rTMS can modulate brain metabolic activity in a dose-dependent manner.
- The designed system enables precise application of rTMS for studying its effects in small animal models.
