Brain Effects of Gamma Frequency Sensory Stimulation (40Hz Light, Sound and Other Devices)

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Despite the huge healthcare and economic impact of AD, there is still no disease modifying therapeutics available. In fact, the available therapeutics show low efficacy at best in the treatment of cognitive impairment in dementia. Development of a non-invasive medical device that is effective in slowing cognitive impairment is not only revolutionary but also possibly cost- effective. In this study, participants will come to MIT for a 1-day visit and the investigators will evaluate the effects of GENUS in cognitively normal, healthy adults. Investigators will use Electroencephalogram (EEG), Magnetoencephalography (MEG), magnetic resonance imaging (MRI), neuropsychological testing, and blood sampling in subsets of participants to evaluate for biological effects and safety of GENUS stimulation.