View clinical trials related to Healthy Controls.
Filter by:The goal of this basic science study is to to explore the responsivity of glutamate in the brain of treatment-resistant schizophrenia patients to the drug riluzole. The main aims of the study are: To assess the role of glutamate in treatment-resistant schizophrenia using magnetic resonance spectroscopy. To assess the relationship between glutamate levels and brain structural and functional measures (using: structural MRI; functional MRI (fMRI) and arterial spin labelling (ASL)) at baseline. To assess the relationship between longitudinal change in glutamate levels and brain structural and functional measures. To assess the relationship between longitudinal change in glutamate levels and changes in psychopathology. The researchers will compare the changes with healthy controls and those without treatment-resistant schizophrenia.
The overall goal of the proposed research is to evaluate the use of [11C]SY08 as a PET radiotracer for aggregated alpha synuclein (αS) in individuals with Parkinson's disease (PD), Multiple system atrophy (MSA), Dementia with Lewy Bodies (DLB) and healthy controls. The purpose of this study is to evaluate the use of [11C]SY08 as a PET radiotracer for αS fibrils in individuals with PD, MSA, DLB and healthy controls. The specific aims of the current study are: 1. To determine brain uptake, distribution, and kinetics of [11C]SY08 in healthy individuals. 2. To determine brain uptake, distribution, and kinetics of [11C]SY08 in patients with alpha synuclein aggregates in the brain, including PD, DLB and MSA. 3. To determine human dosimetry of [11C]SY08 in healthy individuals An intravenous bolus injection of [11C]SY08 will be administered per subject for brain PET imaging.
Beyond pulmonary complications, COPD presents with extrapulmonary manifestations including reduced cognitive, cardiovascular, and muscle function. While exercise training is the cornerstone in the non-pharmacological treatment of COPD, there is a need for new exercise training methods. The COPD-HIIT trial intend to investigate the effects and mechanisms of 12 weeks supramaximal high-intensity interval-training (HIIT) compared to moderate intensive continous training (MICT) in people with COPD and matched healthy controls on important clinical outcomes. The trial also intends to compare the effects of 24 months of exercise training (supramaximal HIIT or MICT) to usual care in people with COPD on brain health, cardiorespiratory fitness and muscle power; in people with COPD.
The purpose of this observational research study is to better understand immune responses to vaccines against viruses (influenza or SARS-CoV2). The goal is to determine any differences in immune responses to vaccines in uninjured people and in people living with spinal cord injuries, who are typically at increased risk of infections.
Background: The microbiome is the bacteria and other microorganisms that live inside and on the body. The microbiome is important for our health. Researchers study how the microbiome help people stay healthy. They study how the microbiome affects the body when people get sick. To do this research, they need samples of the microbiome living on the bodies of many people. The purpose of this natural history study is to collect microbiome samples in a repository. These samples will be used for future research. Objective: To collect microbiome samples from the body that can be used for future research. Eligibility: People of any age. Only those older than 3 years will be seen at the NIH clinic. Design: Participants will fill out a questionnaire. Topics will include their medical history and foods they eat. Participants will be asked to give 1 or more of the following: Stool, urine, saliva, vaginal fluid, and breastmilk. These samples can be collected at home and sent to the researchers. Cells from participants cheek, nose, mouth, skin, rectum, and/or vagina. The cells may be collected by rubbing the area with a sterile cotton swab. These procedures can also be done at home. Blood. Blood may be drawn using a needle inserted into a vein in the arm. For young children, blood may be collected by a prick on the heel or finger. Intestinal tissue samples. These may be collected from participants who are having an endoscopy or colonoscopy for other reasons. Skin tissue samples. These may be collected from participants who are having biopsies for other reasons.
Personal identity is composed of multiple facets of the self that are constructed and nourished through memories of past experiences (i.e., autobiographical memory) and the imagination of events that may occur in the future (i.e., future thinking) . While our previous work has shown that people with relapsing-remitting multiple sclerosis (pwRRMS) have autobiographical memory and future thought disorders, their impact on personal identity has not yet been explored. Based on a cognitive and clinical neuropsychology approach, this research project aims to better understand the cognitive mechanisms involved in the relationship between identity, autobiographical memory and future thinking in pwRRMS. We will examine the extent to which pwRRMS manage to maintain and reshape their identity through life experiences, with a particular interest in the potential integration of the disease as a facet of their identity. In addition, we will explore the positive and/or negative consequences of disease-related identity changes on emotional well-being and quality of life, as well as their links with the duration and severity of the disease. Overall, this research project will contribute to identify new therapeutic levers that can be used for the development of adapted and personalized care.
The purpose of the REVIPSY study is to measure retinal and the visual cortical electrophysiological responses in situations at risk of psychosis in patients who have experienced a first psychotic episode. A perspective of this project will be to create new electrophysiological biomarkers predictive of the risk of conversion to psychosis
The study is investigating dysfunctions in neurocircuitry in regards to irritability with healthy controls (HC) and individuals with Major Depressive Disorder (MDD) by performing MRIs. The MDD group will also be randomized to receive ketamine or midazolam to investigate changes post-treatment in neurocircuitry with regards to irritability.
Eligible subjects will be asked to take a placebo/treatment capsule for a total of 3 days and then participate in a study visit on the fourth day. This study visit will include a medical exam, clinical labs, questionnaires, body composition measurements, and urine and stool collections. Additionally, participants will consume a sugar cocktail to measure their gut permeability, participate in an acute ethanol challenge, and undergo two muscle biopsies. The study will take approximately 3-4 hours and a designated driver will need to drive the participant home. On the fifth day, you will be asked to return to drop of the 24-hour urine collection.
The purpose of this research study is to measure synaptic density in the brain comparing individuals with cocaine use disorder to healthy controls.