Active clinical trials for "Cognitive Dysfunction"

Pretest and validation of the German version of the Amsterdam instrumental activities of daily living questionaire short in elderly people with normal cognition, mild cognitive impairment (MCI) or mild dementia in the German speaking part of Switzerland. The aim is to investigate the psychometric properties of the final Amsterdam instrumental activities of daily living questionaire short (A-IADL-Q-SV) German. Participants with normal cognition will be recruited in the community and participants with MCI and mild dementia in three memory clinic settings.

The aim of this study is to investigate the relationship between cognitive impairment and retinal nerve fiber layer & ganglion cell inner plexiform layer in MS.

The ARBRE Study is an observational prospective trial aimed at investigating the impact of the therapy initiation with INTIs on brain outcomes according to the time of therapy initiation. Three study arms are considered: 1) Early treated HIV-1 infected patients (<3 months since estimated date of infection), 2) Regularly treated HIV-1 infected patients (>6 months since estimated date of infection), 3) Matched seronegative control group. Study assessments will be performed at baseline, 1 month and 12 months. Study assessments will comprise comprehensive evaluation of brain outcomes. They will include cognitive functioning, neuroimaging parameters, and functional outcomes.

Prospective study on patients enrolled in the ReCODE treatment protocol

This study attempts to replicate the findings published in Nature Medicine by Nation and colleagues (2019). By using a large observational cohort (DZNE - Longitudinal Cognitive Impairment and Dementia Study; DELCODE) consisting of cognitively healthy individuals, individuals with subjective cognitive decline, mild cognitive impairment, and dementia due to Alzheimer's disease, an association between the blood-brain barrier and cognitive dysfunction is investigated. The integrity of the blood-brain barrier is investigated by using a novel MRI protocol as well as a novel biomarker in the cerebrospinal fluid.

Alzheimer's Disease is a neurodegenerative disease age related caused by neurofibrillary tangles misfolding and Beta-amyloid protein accumulation. In the last decade several findings showed the role of biophenols present in diary intake such as extra virgin olive oil as potential antagonist of neurodegeneration. Two population studies (The Seven Countries Study and Three-City-Study) and four clinical trials (PREDIMED, PREDIMED - NAVARRA, ACTRIN and ISRCTN) have already suggested that mediterranean diet or other diets supplemented with extra virgin olive oil could improve cerebral performance.

Some patients with subjective cognitive decline (SCD) progress to neurocognitive disorders (NCD), whereas others remain stable; however, the neuropsychological determinants of this progression have not been identified. The investigators objective was to examine baseline neuropsychological indicators that could discriminate between people in whom the SCD progressed to a mild or major NCD and people in whom the SCD remained stable. The investigators retrospectively included patients consulting for SCD at a university medical center's memory center (Amiens, France) and who had undergone three or more neuropsychological assessments at least 6 months apart. The relationship between domain-specific scores and the global cognitive score (GCS, as a function of final status (stable SCD vs. progression toward a mild or major NCD)) was examined using a generalized linear mixed model.

The exact neuronal mechanism underlying the cognitive decline associated with diabetes mellitus type 2 (DM2) still remains to be elucidated. Multi-parametric functional MRI can potentially provide functional, micro-structural, micro-vascular, and metabolic information on the affected brain at an earlier stage than does conventional structural MRI. The overall aim of the current proposal is to obtain a better understanding in the neuronal mechanisms that underlie cognitive decline in DM2 and the putative prediabetic condition the metabolic syndrome (MetS).

The purpose of this study is to assess the performance of AclarusDx™, an investigational blood test detecting gene expression information, and intended to help physicians in making an Alzheimer's Disease diagnosis in patients having memory impairments.

Background: - Parkinson's disease causes slow movements, stiffness, and tremor. It can get worse over time, and in some cases can lead to dementia. Researchers are interested in how dementia affects the brain in people with Parkinson's disease. They will study both people with Parkinson s disease and healthy volunteers. They will give tests of thinking and memory, and look at brain activity using imaging studies. This may provide more information on what parts of the brain are not working well in people who have dementia related to Parkinson's disease. Objectives: - To use imaging studies to see what parts of the brain do not work well in people with dementia caused by Parkinson's disease. Eligibility: Individuals at least 40 years of age who have Parkinson s disease. Healthy volunteers at least 40 years of age. Design: Participants will be screened with a medical history and physical exam. This study requires two outpatient visits over 2 days. Participants will have tests of thinking, memory, and concentration. They will answer questions and fill out questionnaires. The tests will also look at how quickly they can move and handle small objects. The tests will take about 3 hours. Participants will have magnetic resonance imaging to study the brain. Functional MRI (fMRI) can show what parts of the brain are used when performing a task. Participants will respond to images on a computer screen during fMRI. Treatment will not be provided as part of this study.