Zapping your brain during naps might boost emotional resilience

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18-50 years * Medically healthy * English-speaking (able to provide consent and complete questionnaires) * Citizen or holding permanent resident status * Regular napper (1 or more naps per week) Exclusion Criteria: * Any current or past history of neurological disorders or acquired neurological disease (e.g. stroke, traumatic brain injury), including intracranial lesions * History or head trauma resulting in prolonged loss of consciousness; or a history of \>3 grade 1 concussions * Current history of poorly controlled headaches including intractable or poorly controlled migraines * Any systemic illness or unstable medical condition that may cause a medical emergency in case of a provoked seizure (cardiac malformation, cardiac dysrhythmia, asthma, etc) * History of seizures, diagnosis of epilepsy, histoy of abnormal (epileptiform) EEG, or family history of treatment resistant epilepsy with the exception of a single seizure of benign etiology (e.g. febrile seizures) in the judgment of a board-certified neurologist * Possible pregnancy or plan to become pregnant in the next 6 months * Any metal in the body * Any medical devices or implants (i.e. cardiac pacemaker, medication infusion pump, cochlear implant, vagal nerve stimulator) unless otherwise approved by the responsible MD * Dental implants containing metal * Any medication that may alter seizure threshold: ADHD stimulants (Adderall, amphetamine); tricyclic/stypical antidepressants (amitriptyline, doxepine, imipramine, maprotiline, nortriptyline, buproprion); antipsychotics (chlorpromazine, clozapine); bronchodilators (theophylline, aminophylline); antibiotics (fluoroquinolones, imipenem, penicillin, cephalosporins, metronidazole, isoniazid); Antivirals (valacyclovir, ritonavir); OTC antihistamines (diphenhydramine, Benadryl) * Claustrophobia (a fear of small or closed places) * Back problems that would prevent lying flat for up to two hours * Regular night-shift work (second or third shift)