View clinical trials related to Cognition Disorders.
Filter by:Measurement of metabotropic glutamate receptor type 5 (mGluR5) binding capacity in the brain, may be a valuable tool in the early detection, understanding, or evaluation of Parkinson disease (PD), Huntington disease (HD), Fragile X syndrome (FXS), Autism Spectrum Disorder(ASD), Alzheimer's Disease(AD), and subjects with mild cognitive impairment (MCI). The goal of this study is to assess [18F]F-PEB positron emission tomography (PET) imaging as a tool to detect mGluR5 density in the brain of PD, HD, FXS ASD, AD, and MCI research participants and similarly aged healthy subjects.
The primary objective of this protocol is to determine if brain amyloid imaged with florbetapir F 18 (18F-AV-45) PET scans is predictive of progressive cognitive impairment during the subsequent 36 months for groups of: normal controls, mild cognitive impairment and Alzheimer's disease. Hypothesis 1: The probability a subject will experience progressive cognitive impairment within 36 months of imaging will be greater in subjects whose 18F-AV-45 PET scan was rated amyloid positive compared to subjects whose PET scan was rated amyloid negative. The secondary objective is to determine the stability, over 36 months of a clinical diagnosis, of AD in patients with an amyloid positive 18F-AV-45 PET. Hypothesis 2: The diagnosis of AD will remain unchanged in patients whose PET scan were rated as amyloid positive.
This is a 24-month study of the use of laronidase administered into the spinal fluid to treat cognitive decline in mucopolysaccharidosis I (MPS I). MPS I is a rare genetic condition due to deficiency of the enzyme alpha-l-iduronidase. Laronidase is the manufactured form of the enzyme alpha-l-iduronidase. MPS I is a heterogeneous disease with several clinical phenotypes ranging from the most severe, Hurler syndrome, to the attenuated forms, Hurler-Scheie and Scheie. Although patients with milder forms of MPS I may not have grossly observable problems with cognition, these patients do have learning difficulties that are apparent in school and with neuropsychological testing. The goal of this study is to evaluate whether intrathecal recombinant human alpha-l-iduronidase (rhIDU) injections can stabilize or improve cognitive decline in individuals with MPS I.
Postoperative cognitive dysfunction (POCD) can be a serious complication. The development of therapeutic strategies for the prevention and treatment of this condition requires the identification of subgroup of patients with the greatest incidence of POCD. Several retrospective analyses have raised the possibility that surgery is a risk factor for the accelerated progression of Alzheimer's disease (AD). Moreover, there is increasing evidence that inflammatory mechanisms are involved in the pathogenesis of AD. Major surgery can be associated with a profound systemic inflammatory response. Consequently, it is reasonable to suggest that there is a link between major surgery and the postoperative development of AD in patients who are already at high risk for this complication, e.g. the elderly with mild cognitive impairment. In addition, there are several laboratory investigations that suggest that anesthetic agents increase amyloid peptide levels as well as enhance oligomerization of these proteins. The significance of these findings, however, is unknown. This clinical study seeks to correlate perioperative inflammatory responses, perioperative changes in amyloid-beta protein levels (markers of AD) with neurocognitive and functional outcome in the elderly who are at risk for POCD. This knowledge does not exist, but is essential in the effort to plan perioperative care that can reduce the incidence of POCD as well as improve functional recovery.
This study is to evaluate the safety and efficacy of the study drug compared to placebo in the treatment of cognitive impairment in men with schizophrenia.
The purpose of this research study is to learn more about cognitive deficits in people with certain mood disorders. The mood disorders are Major Depressive Disorder (MDD) and Bipolar disorder, depressed type. Cognitive deficits are problems with things like thinking and memory. People with cognitive deficits may have problems concentrating and paying attention. When talking, they may have trouble recalling a word they want to say. They may think slowly and have problems remembering things. These deficits can affect an individual's ability to work and function socially. Cognitive deficits that occur with depression may increase the risk of a relapse of major depressive disorder. We want to study the course of cognitive impairment in subjects as they are receiving treatment for their depression. We want to find out if their cognitive deficits get better, worse, or stay the same. We also want to learn more about a stress hormone called cortisol that is produced in the body. We want to study the relationship between cortisol and cognitive impairment. Recent research has shown that cognitive impairment may be more severe in people who have high levels of cortisol in their blood. We will also measure the levels of a protein in your blood called brain-derived neurotrophic factor (BDNF). BDNF helps the growth of new brain cells. It appears that the growth of new brain cells lessens when people are depressed. Treatment with antidepressant medications may cause BDNF levels to increase and return to normal. We are interested in studying the relationship between BDNF levels and cognitive impairment throughout treatment.
The purpose of this study is to determine whether preoperative administration of Rivastigmine prevents the incidence of postoperative delirium in patients undergoing major surgery as well as postoperative cognitive dysfunction.
This is a 8-week double-blind placebo controlled parallel group study of the efficacy of varenicline (Chantix) for smoking cessation in schizophrenic patients, and its effect on cognitive function in patients with schizophrenia.At some sits evaluation of smoking measures is extended to 12 weeks. Correlations will be made with biological predictors of efficacy: a) measures of nicotinic receptors in lymphocytes b) DNMT1 and GAD67 mRNA in lymphocytes. Subjects will be current cigarette smokers or history of regular smokers.
Patients with HCV infection often suffer from chronic fatigue, depression and reduced cognition, even before evolving severe liver fibrosis, liver cirrhosis and hepatic encephalopathy. It is currently unclear to what extent the symptoms er due to a direct pathological effects of the virus itself, or due to pre-existing psychiatric disease. There is a complex relationship between prior or existing drug abuse, psychiatric disease and HCV infection, that makes it difficult to establish cause-effect relationships. A biological mechanism has been suggested to contribute to development of cerebral dysfunction in the patients. According to the prevailing Trojan Horses hypothesis circulating lymphocytes cross the blood brain barrier carrying HCV to the central nervous system and virus is subsequently replicated in the macrophages and the microglia in brain as a separate compartment. As part of the immunological response to viral replication, neurodegenerative processes takes place with a harmful effect on the neural circuit and cerebral function. Identification of HCV RNA negative strand, a replication product, in brain tissue from HCV patients, as part of autopsy studies, supports the hypothesis. Moreover, HCV patients have also been observed with abnormal metabolic concentrations in the frontal white substance and the basal ganglia by MRI spectroscopy compared to control groups. The overall study objective is to assess cerebral function with particular emphasis on cognitive functions in HCV patients (genotypes 1,2,3 and 4) by use of a neuropsychiatric test battery. Furthermore, the patients will be examined by MRI, including magnetization transfer, diffusion tensor and contrast perfusion, in order to perform measurements of cerebral volumetric and microstructure. Finally, HCV analysis, including viral sequences and cytokine profiles, in serum and cerebrospinal fluid will be carried out in the study population.
Study to Assess Brain Uptake and Safety of AH110690 (18F) Injection in Subjects with Probable Alzheimer's Disease, Amnestic Mild Cognitive Impairment and Healthy Volunteers.