Healthy Clinical Trial
Official title:
Impact of Repetitive Transcranial Magnetic Stimulation (rTMS) of Limbic Brain Circuitry in Stress Modulation in a Healthy Population
This study will be conducted with healthy male and female participants. Aim 1 will determine during sham repetitive transcranial magnetic stimulation (rTMS) how a drug stressor combination (yohimbine + hydrocortisone) relative to placebo alters : (1a) impulsivity; (1b) mood; and (1c) physiology. Aim 2 will determine whether active rTMS over the medial prefrontal cortex alters the effects of stress-exposure on (2a) decision-making, (2b) mood, and (2c) biomarkers of stress.
This study will use a double-blind, within-subjects randomized crossover design. Each participant will complete 4 sessions in this two-factor (2x2) combinatorial design: 1Hz medial prefrontal cortex (mPFC) vs. sham repetitive transcranial magnetic stimulation (rTMS) X pharmacological stressor (yohimbine 54mg + hydrocortisone 20mg) vs. placebo, with each session separated by at least 1 week. Participants will be asked not to use alcohol or drugs for 24-hr before arriving at the lab. We expect to complete screen at least 20 individuals to complete 12 individuals in this study. Candidates will first undergo psychiatric and medical screening to rule out contraindications to participation. Once enrolled, each participant will complete, in randomized order, the 4 conditions above. Periodic measures will be collected before and after the rTMS/sham and stress/placebo interventions. These measures will include subjective, behavioral and physiological assessments, as well as saliva and blood samples. ;
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