Brain Connectivity Marker for Alzheimer's Disease

This study is investigating brain connectivity patterns in people across the spectrum of Alzheimer's disease — from those who just report memory concerns to those with mild cognitive impairment and confirmed Alzheimer's — to identify early markers of the disease. **You may be eligible if...** - You live in Sweden and speak Swedish - You have concerns about your memory (but no confirmed diagnosis), OR have mild cognitive impairment with abnormal Alzheimer's biomarkers in spinal fluid, OR have a confirmed diagnosis of Alzheimer's disease - Your memory test scores (MMSE or MoCA) fall within the range required for your group **You may NOT be eligible if...** - You have dementia from a cause other than Alzheimer's disease - Your memory test scores are outside the range for your specific group - You do not speak or understand Swedish Talk to your doctor to see if this trial is right for you.