The purpose of this study is to better understand how the oral microbiome (bacteria in the mouth) may be associated with different neurologic conditions like Alzheimer's disease and Multiple Sclerosis. This will require one visit, typically less than an hour. We will collect some information about the subject's past medical history including dental history as well as collect saliva and perform a nasal swab. This will also include a measure of genetics. There will be an optional blood collection. Samples will also be stored for future research.

The purpose of this study is to learn more about late-onset epilepsy of unknown etiology (LOEU), which is defined as an onset of seizure activity in late life (age 55 or above) without a clear neurological cause. That is, many older adults will experience seizures due to neurological conditions such as stroke, brain injury, tumor, or infection. However, other individuals will also develop seizures with no identified cause.

Participation entails a single study visit lasting 2-3 hours including a blood draw, completion of standardized cognitive testing, and several questionnaires. The goals of the study include to examine blood markers that can help us to better understand the condition including dementia risk, and how these markers may impact the clinical presentation of the condition. No interventions/treatments are included with this study.

The Participant REgistry for Prevention-focused Aging/dementia REsearch (PREPARE) is a database of individuals with Mild Cognitive Impairment who are interested in participating in research on aging/Alzheimer's disease and related dementias conducted at the Medical University of South Carolina (MUSC). PREPARE will connect MUSC researchers with potential participants so they can provide information about studies for which they may be eligible. PREPARE will also collect survey data from people with Mild Cognitive Impairment and their study partners to better understand the impact of this condition on daily functioning.

This is a Phase II research study to determine dosing of non-invasive brain stimulation for patients with Mild Cognitive Impairment (MCI) and current or past depression. The brain stimulation treatment used in this study is called repetitive transcranial magnetic stimulation (rTMS). rTMS is a Food and Drug Administration (FDA)-approved treatment for depression. The goal of the study is to see if brain stimulation can be used for MCI patients to improve memory, thinking, and mood, and what dose of stimulation works best.

The study uses a form of rTMS called intermittent theta burst rTMS (accelerated iTBS). This treatment has not been FDA-approved for MCI patients. This double-blind study requires 11 study visits over the course of six months.

The purpose of the Alzheimer's Disease Registry Study (ADRS) is to (1) create a registry that will continue to provide study-ready subjects who meet research diagnostic criteria for the different stages of AD and who have been evaluated using research instruments that allow for their participation in clinical trial research, (2) provide a platform to allow for continual follow-up with registry participants to allow for their participation in clinical trial research at different stages of the disease process, and (3) to incorporate a population of veterans and minorities suffering from AD, a population that is not proportionally represented in clinical trial research, into the registry.

By collecting data pertaining to medical history, current medication details, family history, vital signs, and memory/thinking symptom concerns and evaluating a subject's ability to perform certain tasks, such as memory and thinking tests, questions about their daily activities, and social functioning; researchers are able to determine a research subject's potential eligibility in a clinical trial research protocol.

A registry with such information would enable researchers to effectively and efficiently identify potentially eligible research subjects for the program's evolving portfolio of Alzheimer's disease-related clinical trials.

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 and imaging of both organs, in order to investigate the relationship between the two conditions. The study consists of two initial visits, and a 4- and 8-year follow-up visit.