The overall goal of this exploratory study is to determine the optimal conditions to elicit gastric evoked potentials (GEPs) with Transcranial Magnetic Stimulation (TMS).
Aim 1: Determine the optimal stimulation parameters and the optimal location for eliciting GEPs in cortical motor areas.
Aim 2: Determine whether various modes of repetitive TMS (rTMS) neuromodulation targeted to GEP hotspots shape gastric motor responses to a water load.
The investigators will record some clinical, demographic, and autonomic data (i.e. EKG) in our enrolled subjects. Secondary analyses will use these variables as covariates to investigate any systematic impact on the measures from Aims 1 and 2.
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