Inclusion Criteria:  Right-handed healthy subjects between the ages of 18-65 will be included for recruitment.  Exclusion Criteria:  Diagnosed with any gait or postural disorders Major neurological disease or disorder Major musculoskeletal or nerve disorder, or disorder of hands, wrists and upper limbs History of stroke or seizure Diagnosed with dementia Diagnosed with myasthenia gravis or acute narrow angle glaucoma Has intracranial implant(s) or device(s) Has an implanted cardiac pacemaker or implantable cardioverter-defibrillator (ICD) Presence of metal implanted in body that is contraindicated in TMS Caffeine or chocolate consumption 1-2 hours before study sessions Consumption of grapefruit juice 24 hours before study sessions Alcohol consumption 24 hours before study sessions Pregnancy* Major depression/psychiatric disorder that in the opinion of the Investigator will affect patient's understanding of study procedures and willingness to abide by all procedures during the course of the study Regular usage of CNS active drugs or calcium channel blockers during or up to 2 weeks before participating in the study** Is on antipsychotics, marijuana, or other recreational drugs (including tobacco) that affect the nervous system Major cardiac, hematopoietic, liver, or kidney disease or infection Treated hypertension Hypersensitivity to benzodiazepines Hypersensitivity to calcium channel blockers Hypersensitivity to antitussives Hypersensitivity to anticonvulsants Regular usage of androgens, antibiotics, antifungals, antivirals, cardiovascular/gastrointenstinal drugs, muscle relaxants, and platelet aggregation inhibitors during or up to 2 weeks before participating in the study