MRI Guided Closed-loop TMS-EEG
Spatiotemporally Precise Neuromodulation by Transcranial Magnetic Stimulation Guided by Multimodal Neuroimaging
Sunnybrook Health Sciences Centre
160 participants
Sep 7, 2023
INTERVENTIONAL
Conditions
Summary
The goal of this interventional study is to develop an individualized approach using transcranial magnetic stimulation (TMS) in a high-precision manner. This approach will use TMS to modulate brain activity at multiple locations simultaneously. Functional magnetic resonance imaging (fMRI) and electroencephalograph (EEG) will record the responses and guide the stimulation. Specifically, the placement and orientation of TMS coils will be tailored to stimulate the targeted functional brain areas informed by fMRI. To maximize the interventional effect, stimulation pulses will be delivered based on EEG oscillations.
Eligibility
Plain Language Summary
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Interventions
The target locations of TMS will be cortical regions defined by either anatomical landmarks or functional regions derived from the individual's functional and structural MRI for Aim 1. TMS target locations for Aim 2 and 3 are determined by Aim 1's results. These TMS target regions will be guided by a navigation system. TMS will be parametrically varied with combinations of pulse strength and frequencies based on experimental conditions. TMS strength will be referred to the resting motor threshold (rMT), which will be determined independently for each participant. TMS pulses will be delivered at fixed time instants for Aim 2 and at time instants based on the phase of oscillatory neural activity for Aim 3.
Locations(1)
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NCT06050603