The purpose of this study is to evaluate the long-term safety and effectiveness of the study drug, aducanumab in participants who have previously received aducanumab in the following previous clinical trials: Study 301 [ENGAGE]; Study 302 [EMERGE]; Study 103 [PRIME], and Study 205 [EVOLVE]. The study may last for about 2.5 years consisting of about 33 planned research clinic visits and 8 telephone safety contacts.

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.

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.

Candidates for this study may or may not report disturbances in odor perception as their primary reason for seeking treatment at MUSC. This study is designed to collect long term, observational data from patients who are being treated with routine clinical care in health clinics at MUSC. Data from clinical questionnaires will be de-identified and stored in a database.

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.

With this research study, we want to learn if methylphenidate (Ritalin® and others) helps people with Alzheimer's disease and apathy (lack of interest or concern for things that others find moving or exciting).

Alzheimer's disease and the isolation it produces imposes a heavy burden on informal caregivers (CG) of Veterans who are persons with dementia (PWD), who carry greater burden than those caring for persons with other chronic diseases. This feasibilty study will test a mobile application (APP) on a mini-iPad designed for caregivers of community-dwelling Veterans who are PWD in comparison with Web-based informational materials. Building on story-telling interventions effective in other chronic diseases, this feasibilty study proposes Story-Call as a newly-developed mobile application that records, archives, and presents 30/60-second videos by caregivers and professionals, who share brief stories about how they have handled common dementia home-care situations, such as "She wants to go home!" A qualitative component will categorize themes from stories and in 2 phases collect: 1) perceptions from follow-up phone interviews with CG participants; and 2) focus groups with Advisory Group and VA stakeholders as a process evaluation of APP appeal, use, impact, and cultural tailoring. The expected outcomes will examine if CGs find that the APP-recorded stories decrease perceived CG burden and increase social support as efficacy, while confirming feasibility in recruitment, acceptability, practicality, increased adaptation to dementia care, and use of community resources for future scaling up and testing.