View clinical trials related to Mild Cognitive Impairment.
Filter by:Mild cognitive impairment (MCI) is distinguished from healthy aging by cognitive difficulties that are greater than expected for one's age and education. Amnestic mild cognitive impairment (aMCI) is a major sub-type of MCI with noticeable impairments in memory. Approximately 12% of aMCI will progress to AD per year. There are two test to evaluate the effects on memory, but both without Chinese version. This study is to know the test-retest reliability of the Chinese version of the Verbal learning test and Selective reminding test among people with mild cognitive impairment.
Alzheimer's Disease (AD) is characterized by amyloid-β (Aβ) plaque buildup and phosphorylated tau (p-tau) in the brain, as well as widespread neurodegeneration. Amyloid-β and tau are proteins that build up in the brain that may contribute to memory problems. The evidence suggests that both amyloid and tau play a critical role in AD and interventions that reliably and safely decrease the intracerebral burden of amyloid or tau could potentially be of marked clinical importance. Currently, therapeutic options are very limited and while there are pharmacologic interventions that transiently improve cognitive function, there are no treatments that alter disease progression. The purpose of this study is to see if multiple daily sessions of non-invasive brain stimulation can affect brain activity to decrease the amount of amyloid and tau in people with AD as compared to Sham (placebo) stimulation. The type of brain stimulation that will be used is called transcranial alternating current stimulation (tACS). This study will investigate different doses of tACS (2-4 weeks) and assess safety. The hope is that tACS will decrease the amount of amyloid and tau and improve memory and thinking in people with AD.
The aim of this study is to explore the relationship between cortical hyperexcitability, abnormalities of brain network function, and cognitive dysfunction in human patients with AD and whether administration of the antiepileptic medication levetiracetam (LEV) normalizes these measures and improves cognition.
This study will test the effects of different doses of a form of non-invasive brain stimulation for the treatment of individuals with mild cognitive impairment (MCI) and dementia of the Alzheimer's Type (DAT).
The Atlas of Retinal Imaging in Alzheimer's (ARIAS) study is a 5-year study examining the natural history of retinal imaging biomarkers associated with disease risk, disease burden, and disease progression in Alzheimer's disease (AD). The objective of this project is to create a 'gold standard' reference database of structural anatomic and functional imaging of the retina, in order to enable the identification and development of both sensitive and reliable markers of AD risk and/or progression. Our ultimate goal is to develop a new screening protocol that identifies changes related to AD 10-20 years before AD is clinically visible.
Alzheimer's disease (AD) is the leading cause of dementia and its prevalence is estimated to exceed 100 million affects by 2050, becoming the main public health problem worldwide. AD is considered a clinicopathological entity characterized by a progressive cognitive impairment with affectation of memory and other cognitive domains, which underlies a neuropathological pattern with extracellular accumulation of β-amyloid protein (Aβ) in the form of neuritic plaques, intracellular deposits of tau protein in the form of neuritic strands and neurofibrillary tangles, neuronal and synaptic loss and glial proliferation. Classically, its definitive diagnosis implied the existence of a clinical phenotype compatible with dementia, together with the neuropathological findings characteristic of the disease. More recently, evidence of clinical and biological changes leading to the dementia phase has led to the development of new diagnostic criteria that divide the course of AD into 3 stages: (1) a pre-clinical phase, which would include persons with positive biomarkers with normal cognitive performance for their age and educational level; (2) a phase of mild cognitive impairment (MCI), characterized by cognitive performance lower than expected by age and educational level; and (3) a dementia phase, once cognitive deficits interfere with the activities of daily living. Recent research has also shed light into the subdivision of each of the above-mentioned stages in distinct phases. For example, the existence of a subjective perception of cognitive decline or a subtle cognitive decline, have been postulated as phases within the AD preclinical stage. The lack of positive results in the different clinical trials performed to date in patients with AD dementia has redirected the focus of therapeutic strategies towards preventing the development of dementia. For this reason, a detailed characterization of the successive clinical and biological changes that lead to the dementia stage is of vital importance in identifying the persons who could benefit from a possible preventive strategy, as well as the optimal moment to carry out the intervention. The the scientific community, is convinced that intervention aiming to prevent the clinical development of AD dementia must be implemented several years before the first symptoms arise. In this context, the present project is developed under the hypothesis that subjective cognitive decline (SCD) in individuals with a performance in cognitive tests within normality represents the first symptomatic manifestation of AD. In persons with SCD, the presence of a higher intensity of subjective complaint quantified using a specific subjective complaint questionnaire (SCD-Q) will be associated with lower cognitive performance and a higher rate of conversion to MCI and/or dementia. The relationship between the perception of cognitive decline by the subject and his/her relative will differently vary depending on the stage of the disease: in subjects with progressive cognitive impairment, the subjective perception of cognitive decline will decrease with disease progression whereas the perception of decline will increase with disease progression in their relatives. The degree of perception of cognitive decline throughout the different phases of the disease will be correlated with cognitive and affective patterns as well as with changes in AD biomarkers. These changes will be related to specific brain patterns and abnormal levels of AD biomarkers, which on the other hand will also be present in patients with MCI and mild dementia due to AD. The present study has two main objectives that are: 1. To characterize from a cognitive and biomarker (when available) point of view persons with SCD and to study its association with the risk of presenting a progressive cognitive deterioration. 2. To study the evolution of the subjective perception of cognitive impairment by the participants and their relatives and to analyze its impact in cognitive, affective and functional terms along the clinical-biological continuum of AD.
A single-blinded, randomized controlled trial is designed to compare the effects of social interaction, computerized cognitive training, lower extremity strengthening, and tai chi chuan on improving cognitive functions and gait/mobility and reducing falls among 228 subjects with mild cognitive impairment, in which the influence of adherence to the intervention programs will also be examined.
The effectiveness of conventional exercise, tai chi chuan and health education/usual physical activity over a 6-month intervention period in improving primary outcomes and secondary outcomes in older mild cognitive impairment adults will be compared. Third, whether changes in serum levels of the brain-derived neurotrophic factor (BDNF), insulin-like growth factor (IGF)-1, and vascular endothelial growth factor (VEGF) and expression of the apolipoprotein E (APOE) ε4 allele parallel changes in gait characteristics and cognitive functions after the intervention will be examined.
The purpose of this study is to examine safety, feasibility, and the behavioral and brain effects of a non-invasive treatment, repetitive transcranial magnetic stimulation (rTMS), for Veterans with Parkinson's disease and mild impairments in their thinking. The hypothesis is that rTMS can improve thinking for people with Parkinson's disease who are experiencing mild problems with their thinking ability.
The primary goals of this study are to use optical coherence tomography (OCT) angiography (blood vessel mapping) to: 1. Detect retinal blood vessel and blood flow changes in participants with dementia. 2. Detect amyloid protein deposits in the retinas of participants with dementia.