Participants
psychiatric
DISORDER
A total of 33 healthy young adults (mean age 27 years; age range 18-35 years; 16 males; 28 right-handed) participated in the study. We screened participants before enrollment for contraindications to transcranial magnetic stimulation (TMS) using a questionnaire, none of them suffered from any neurologic or psychiatric disorder, nor were they taking any centrally acting prescribed medication. The study was approved by the Johns Hopkins School of Medicine Institutional Review Board in accordance with the declaration of Helsinki and we obtained written informed consent from each participant.