Neurological diseases are the leading cause of disability worldwide and a major contributor to health problems in children and adults. As the majority of these conditions result in lifelong disabilities, the implications for the family and for society is significant.

A significant number of adult and childhood neurological diseases have a genetic component and are caused by changes in our DNA and/or RNA leading to functional changes in the central nervous system. However, for many patients afflicted with these disorders, traditional genetic testing does not identify a clear genetic cause. The goal of this study will be to use newer genetic techniques to evaluate patients and families with neurological disorders to better understand the genetic basis of the disease.

The goal of this pilot study is to determine whether a high-dose form of non-invasive brain stimulation is a promising and safe treatment for Mild Cognitive Impairment. Transcranial magnetic stimulation (TMS) is an FDA approved treatment for depression. In studies of TMS for depression and other disorders, individuals have experienced improved cognitive function. Thus, the current study is testing whether TMS is safe, feasible and effective in improving cognition in individuals with Mild Cognitive Impairment.

Alzheimer's disease and Epilepsy may affect over 80% of individuals that have Down syndrome by the age of 60. Biomarkers found in the blood can enhance our understanding of the earliest changes linked to disease and may enhance clinical detection and healthy aging for individuals with Down syndrome.

The purpose of this study is to discover early neurobiological processes underlying the transition from healthy aging to disease. Our research team has developed technology that allows detection of small changes in the brain that get transferred to the blood.

We are recruiting individuals that either have or do not have Down syndrome for this biomarker study. Participants should be between the ages of 6 months and 85 years old and may include mothers and siblings of a child with Down syndrome. Infants and children will require consent form a parental or legal guardian.

Each participant will provide a blood sample for research purposes. We will also gather some basic health information about senses, habits, exercise level and smoking/vaping exposures.

Loss of smell may affect over 20% of the population, specifically among older age groups and can result in significant health impacts. Smell loss can substantially affect an individual's overall well-being and quality of life. The purpose of this study is to evaluate the impacts of smell loss on neurologic disease (such as Alzheimer's and dementia) and on the risk of death over a 10-year period. We hypothesize that decreased sense of smell is associated with development of neurodegenerative disease and mortality. Participants in this study will fill out an electronic questionnaire (about 30 minutes long) at study entry, and a shortened electronic questionnaire (about 15 minutes long) every year after that for 10 years. No in-person visits are needed.

Patients with Alzheimer Disease and patients with Heart failure (and a control group free from both the previous mentioned conditions) will be evaluated with cardiac and neuropsychological assessments, in order to investigate the relationship between the two conditions. 8 follow up visits will be repeated yearly, for 8 years.

Alcohol Use Disorder (AUD) is a risk factor for Alzheimer's Disease (AD), but more research is needed to identify the potential mechanisms underlying this risk. The present study will use fMRI to examine brain network profiles in mid-life AUD. The goal is to develop techniques to assess risk for Alzheimer's Disease and related dementias. Participation includes cognitive testing and MRI scanning.

Study I7S-MC-HBEH (HBEH) is a multicenter, randomized (i.e. study in which people are assigned at random (by chance alone) to receive one of several clinical interventions), double-blind (i.e., neither the participant nor the person evaluating for the study knows what group the participant has been assigned to), parallel-group (i.e., a type of study where two groups of treatments, A and B, are given so that one group receives only A while another group receives only B.), placebo-controlled (i.e. one group will receive the study drug and the other will receive a substance that has no therapeutic effect, also known as placebo), fixed-dosage (i.e., the dosage will not change during the course of the study), Phase 2a study (i.e., a trial with the objective of assessing what dose is more effective in treating symptoms.) comparing various dosages of LY3154207 administered orally once a day with placebo over 12 weeks in subjects with mild-to-moderate Parkinson disease dementia (PDD).

The study includes a Screening Period (Visits 1 to 2) of a minimum of 7 days and up to 14 days, a 14-day Pretreatment Period (Visits 2 to 3), a 12-week Treatment Period (Visits 3 to 11), and a 14-day Safety Follow-Up Period (Visit 12).

Your participation will last about 17-18 weeks.

The purpose of this study is to find out how LY3154207 compares with placebo in treating memory and thinking problems in individuals with mild-to-moderate Parkinson's disease dementia.

Traumatic Brain Injury is a risk factor for Alzheimer's Disease and other dementias. This study will use neuroimaging in Veterans and civilians with a history of TBI or without TBI to understand whether some of the brain changes that occur in Alzheimer's Disease are present in people with a history of TBI. The study is recruiting male and female military Veterans or civilians with or without TBI between the ages of 30 and 65.

This study will use neuroimaging to understand how the connections in the brain change in Alzheimer's Disease. Changes will also be examined in individuals with mild cognitive impairment and healthy aging. The goal is to discover which brain changes are present in healthy aging and MCI so that future studies can assess the risk for developing Alzheimer's Disease. The study involves blood draw, cognitive testing, MRI, PET scanning, and a 1-year follow-up visit to repeat cognitive testing and MRI scanning.