Electrophysiological Signature of Mild Cognitive Impairment and Its Relationship with Parkinson's Disease: a High-density EEG Investigation

This study is examining the brain's electrical activity in people with mild cognitive impairment (early memory or thinking problems) and those with Parkinson's disease, using high-density EEG (a cap with many sensors placed on the scalp) to better understand these conditions. **You may be eligible if...** - You score above a certain threshold on standard memory/thinking tests (MMSE or MoCA) - If you take memory or mood medications, you have been on a stable dose for at least 4 weeks - You are willing and able to give informed consent **You may NOT be eligible if...** - You have severe dementia - You have been on antipsychotic medications for less than 3 months - You have uncontrolled health conditions - You have metal implants or other reasons you cannot have an MRI - You cannot walk independently Talk to your doctor to see if this trial is right for you.