rTMS Induced Reduction in M1 Excitability

Inclusion Criteria: * Between ages 18 and 45 years old (to avoid any changes in the developing brain, or with aging). * Answer 'no' to questions 2 through 17 on the brain stimulation questionnaire as these factors can increase likelihood of adverse events with brain stimulation. * No neurological damage, disease, or dysfunction (nerve damage, chronic pain disorders, diabetic neuropathy, epilepsy) that affect the upper limbs and limit the ability to complete the study, and/or compromise the objectives of the study * No significant visual impairment that would prevent them from playing a video game. Exclusion Criteria: * Currently prescribed and taking stimulant medication (Adderall, Ritalin, Vyvanse, etc.) * Consumption of over-the-counter stimulants such as caffeine or nicotine (coffee, soda, supplements, energy drinks, tobacco products, or other nicotine containing products such as gum, vape pens, etc...) 12 hours prior to entering the lab on the day of testing as this can directly affect cortical excitability. If a subject takes any of these substances 12 hours prior to the study visit they will be asked to reschedule for a later date. * Have played a real stringed instrument in the last 12 months (e.g. guitar, bass, violin) * Have played the videogame "Guitar Hero" on a traditional guitar controller in the last 12 months.