View clinical trials related to Cognition Disorders.
Filter by:Magnetic resonance imaging (MRI), as a non-invasive and non-contrast enhanced technique, has the potential to improve patient health care and management. The overall objective of proposed project is to: 1. develop, customize, and optimize anatomic and functional MRI methods, 2. explore the use of MRI methods to study CKD and evaluate post-transplant kidneys, and 3. investigate the potential of MRI in the diagnosis, prognosis, and monitoring of the progression of renal dysfunction. In addition to direct studies of the kidney, brain MRI studies will also be performed to identify the cerebrovascular and cognitive effects of chronic renal function deficiency and medical treatment (e.g. hemodialysis and immunosuppression). The brain and kidneys have similar vascular bed, and both are susceptible to vascular injury, which provides the pathological basis for the widely recognized association of reduced renal function with prevalent cerebrovascular diseases (CVDs) and cognitive impairment (CI). The MRI methods in the brain will be applied to explore the origins for widely observed CVDs and prevalent cognitive impairment (CI) in kidney disease patients.
The main objective of the GOOD initiative was to determine which spatio-temporal gait parameters and/or combination(s) of spatio-temporal gait parameters best differentiate between cognitively healthy individuals (CHI), patients with mild cognitive impairment (MCI) and those with mild and moderate dementia.
Traditionally, memory impairments in the elderly population are treated using cholinesterase inhibitors, although impairments remain after treatment. Dopamine (DA) is also involved in cognition and is especially of interest in healthy ageing because of the role in processing speed and cognitive control. To what extent dopamine treatment improves memory and attention in older impaired individuals is unknown. However, such an effect is conceivable because of the close relationship between memory and attention in aging and since improved processing speed and cognitive control may lead to improved memory. The investigators aim to examine, in the impaired older population, whether a treatment using methylphenidate, a DA re-uptake inhibitor that enhances DA, improves attention and memory. The study will be conducted according to a cross-sectional, double-blind, placebo-controlled, 2-way cross-over design. 20 male and female patients with Mild Cognitive Impairment (MCI), amnestic type, aged above 60 years of age; 20 male and female patients with MCI, non-amnestic type, will be recruited from the Orbis Medical Centre. Participants will be treated once with 20 mg methylphenidate (MPH) and once with placebo. All medications will be administered orally with a capsule. The treatment order will be established by counterbalancing.
Transcranial direct current stimulation has shown promising results in stroke patients. This study is a double blind, sham-controlled clinical trial aiming to compare the long-term effects of stimulation in two different cognitive regions after a stroke. Sixty patients who suffer from chronic strokes will be randomized into 1 of 3 groups: dorsolateral prefrontal cortex, cingulo-opercular network and motor primary cortex (control). Each group will receive transcranial direct current stimulation for 20 minutes for 10 consecutive working days (2 weeks). Patients will be assessed with a Dysexecutive Questionnaire, Semantic Fluency test, categorical verbal fluency and Go-no go tests, Wechsler Adult Intelligence Scale, Rey Auditory-Verbal Learning Test, Letter Comparison and Pattern Comparison Tasks at baseline, after their tenth stimulation session (week 2) and endpoint (week 4). Those who achieve clinical improvement with neurostimulation will be invited to receive treatment for 12 months as part of a follow-up study.
A prospective randomized controlled trial aimed at assessing if electroacupuncture (EA) combined with donepezil is more effective than donepezil for improving the cognitive function of AD patients. The hypothesis of this study is as follow: - Is the short-term effect of EA combined with donepezil better than donepezil on improving cognitive function of patients with Alzheimer's disease after 12 weeks' treatment? - Whether the effect of EA combined with donepezil on improving cognitive function can last until the end of 6 months' follow-up?
Morphine and similar substances (called opioids) are often prescribed for moderate to severe pain, such as after a surgery, thus allowing for minimal pain and a better recovery. Unfortunately various, non-dangerous side effects from opioids occur often that limit the way patients feel and can take of themselves, despite otherwise good pain control and minimal limitations from the surgery itself.
This research aim to explore relationships between the presence of amyloid burden and cognitive performance, and its modulation by educational level. For this purpose we will combine Positron emission tomography (PET) imaging and neuropsychological assessment acquired on 3 groups of subjects, from two population-based cohorts "3C" and "AMIMage" The first group includes cognitively intact participants who will serve as controls, the second group, subjects with mild cognitive impairments without memory complaint and the third, subjects with both mild cognitive impairments and memory complaint.
Postoperative cognitive dysfunction (POCD) may lead to serious consequences. But the underlying mechanisms are still unclear. Blood Oxygen Level Dependent (BOLD) fMRI and biochemical indicators will be used to explore the underlying mechanisms and represent a promising precursory target for diagnosis and treatment of POCD.
The effect of retrograde autologous priming (RAP) on regional cerebral oxygenation (rSO2) still remains unclear, because studies are limited in sample size and study design, and because of the absence of prospective studies. The investigators hypothesize that RAP limits the degree of hemodilution and thereby limits prolonged intraoperative cerebral desaturation during cardiopulmonary bypass (CPB), compared to the conventional priming method. The primary objective of this study is to determine whether RAP limits the degree of hemodilution and limits prolonged intraoperative cerebral desaturation during cardiopulmonary bypass, compared to the conventional priming method. Prolonged intraoperative cerebral desaturation will be assessed by rSO2 desaturation score50. rSO2 desaturation score50 > 3000 is associated with increased risk of cognitive decline. The investigators hypothesize that RAP limits the degree of hemodilution and thereby limits the incidence of rSO2 desaturation score50 > 3000 with a relative difference of 50%. The subjects who are divided in the RAP group, the retrograde autologous priming technique will be used, where the patient's own circulating blood partially will be replaced by the priming solution in the cardiopulmonary bypass. In the Control group the conventional priming method will be used. The main study parameters is rSO2 desaturation score50.
Single center threeway double blind cross over trial investigating the pharmacological responsivity in patients with VCI using a challenge aimed at the monoaminergic and cholinergic neuronal systems