Continuous theta burst stimulation inhibits the bilateral hemispheres

Area of Science:

• Neuroscience
• Cognitive Science
• Neuroimaging

Background:

• Transcranial magnetic stimulation (TMS) is a non-invasive brain stimulation technique.
• TMS can modulate neural activity in targeted cortical areas.
• Understanding the bilateral effects and interhemispheric communication is crucial.

Purpose of the Study:

• To investigate the effects of continuous theta burst stimulation (cTBS) on bilateral motor cortex functions.
• To analyze the modulating effects of cTBS on motor regions using combined electrophysiological and neuroimaging methods.
• To explore interhemispheric communication pathways modulated by TMS.

Main Methods:

• Combined evoked potential recording and functional brain imaging (e.g., fMRI or EEG-fMRI).
• Application of continuous theta burst stimulation (cTBS) to bilateral motor cortex regions.
• Analysis of concurrent changes in neural activity and connectivity.

Main Results:

• Concurrent inhibition of bilateral motor regions was observed following cTBS.
• Electrophysiological and imaging data consistently supported the observed inhibition.
• Evidence for modulation of the contralateral hemisphere via callosal pathways was found.

Conclusions:

• Continuous theta burst stimulation can induce bilateral inhibitory effects in the motor cortex.
• Callosal connectivity plays a significant role in mediating TMS-induced interhemispheric modulation.
• These findings advance the understanding of non-invasive brain stimulation effects on cortical networks.