This study will determine how noninvasive nerve stimulation affects human brain, stomach, and autonomic activity.
Scientific research into the basic mechanisms underlying neuromodulation is relatively recent and incomplete. The purpose of the proposed study is to determine how a form of neuromodulation, transcutaneous electro-accupoint stimulation, which is non-invasive and non-painful, affects human brain, stomach, and autonomic activity. We will accomplish this by integrating whole brain functional MRI (fMRI) methodologies with gastric MRI and physiological monitoring. This study will comprise 3 functional magnetic resonance imaging (fMRI) brain-gut scans, all while receiving the neuromodulation with varying parameters. Participants will also have their heart rate, breathing, and gastric activity monitored during all visits.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
DOUBLE
Enrollment
50
non-painful active transcutaneous electro-acupoint stimulation will be delivered to the abdomen and leg
Massachusetts General Hospital
Boston, Massachusetts, United States
RECRUITINGBrain activity during functional magnetic resonance imaging (fMRI)
Blood oxygen-level dependent (BOLD) signal change between active and inactive auricular tVNS
Time frame: 1 hour
Stomach activity during gastric magnetic resonance imaging (MRI)
Gastric accommodation and sensitivity change between active and inactive auricular tVNS
Time frame: 30 minutes
Electrogastrography (EGG)
We will use EGG to measure slow wave myoelectrical activity, as measured by EGG power/peak frequency.
Time frame: 2 hours
Electrocardiography (ECG)
We will use ECG to examine high frequency heart rate variability (HF-HRV), i.e. the R-peak of the QRS complex.
Time frame: 2 hours
Respiration
Respiration will be measured in beats per minute (bpm).
Time frame: 2 hours
Skin Conductance Levels (SCL)
SCL will be measured in volts per second.
Time frame: 2 hours
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.