The purpose of this study is to use neuroimaging to understand how networks in the brain change over time. Although the single most significant risk factor for developing Alzheimer's disease (AD) is age, the neurobiological processes underlying the transition from normal aging to AD are not well understood. Our group of researchers has developed ways to use MRI to detect small changes in certain parts of the brain. We will use neuroimaging to understand how the connections in the brain change over time in healthy aging. The goal is to discover which brain changes are present in healthy aging.

Participants will have two study visits (about 2 years apart) where they will undergo tests to assess mental function, fill out questionnaires, and undergo a blood draw, brain MRI and PET scan and provide a saliva sample. At the second visit, participants will not repeat PET scan. Participants will continue to be followed longitudinally every two years as long as the study is funded.

Participants are required to have a Co-Participant accompany them for the first portion of each visit. This individual must be a reliable informant that has contact with the participant at least once per week.

Older adults typically have trouble identifying the speech they hear, especially in noisy environments. Fortunately, compared to younger adults, older adults are better able to compensate for difficulties identifying the speech they hear by recruiting the visual system. However, the extent to which older adults can benefit from visual input, and how this influence relates to age-related changes in brain structure and function, have not been thoroughly investigated. The general purpose of this study is to determine how age-related changes in brain structure and function affect how well people hear and see. This study seeks participants with normal hearing to mild hearing loss, who also have normal or corrected-to-normal vision.

Rehabilitation interventions including resistance training, functional and task-specific therapy, and gait or locomotor training have been shown to be successful in improving motor function in individuals with neurologic disease or injury. Recent investigations conducted in our laboratory indicate that intense resistance training coupled with task-specific functional training lead to significant gains in functional motor recovery. Similarly, gait rehabilitation involving intense treadmill training and/or task-specific locomotor training has been shown to be effective in improving locomotor ability. However, the underlying neural adaptations associated with these therapeutic approaches are not well understood. Our primary goal is to understand the motor control underpinnings of neurologic rehabilitation in order to apply this knowledge to future generations of therapeutic interventions.

Systemic lupus erythematosus (lupus; SLE), Systemic Sclerosis (scleroderma; SSc) and Systemic Vasculitis (SV) are relatively rare rheumatic diseases that disproportionately impact the African American community, and particularly African American women. The causes of lupus, scleroderma and vasculitis are unknown, but thought to include both genetic and environmental factors. We are enrolling lupus, scleroderma, and vasculitis patients, and healthy control subjects. This is not a drug study. The purpose of this study is to better understand the factors that predispose people to develop lupus, scleroderma, and vasculitis. Information about medical, social and family history, medications, physical exam findings, and laboratory tests will be collected for analysis. This study will involve approximately 1360 volunteers.

In this study researchers aim to improve the collaborative research efforts of the Center for Rehabilitation Research in Neurological Conditions at the Medical University of South Carolina. The Center is comprised of several laboratories, including: the Communication and Swallowing Laboratory; the Locomotor Energetics and Assessment Laboratory; the Locomotor Rehabilitation Laboratory; the Neuromuscular Assessment Laboratory; and the Upper Extremity Motor Function Laboratory. The PI and investigators will recruit for their current and future studies in the above laboratories from the Clinical Database established here. Studies utilizing the Clinical Database will not include PHI but will only link to the Clinical Database individual patient code. This study is completed by completing a simple screening form with study personnel. Medical care/treatment future participation in studies is not influenced by inclusion in this study. We are also recruiting Healthy Controls for this study.

We are recruiting mothers of children with typical development, autism, or fragile X syndrome.

This study focuses on parental experiences and normal individual differences that may influence child language development. The broader goal of the study is to understand which family experiences support language development in children who have neurodevelopmental disabilities, such as autism. We are recruiting families who have children who are typically developing, have autism, or have fragile X syndrome.