View clinical trials related to Cognition.
Filter by:Cognitive impairments such as memory impairments, word-finding difficulties, compromised orientation and perception are often observed in stroke patients. Low serum-mg-concentrations are associated with cognitive impairments in ischemic stroke patients one month after stroke onset. It is not clear, if cognitive impairments after stroke is caused by the mg-deficiency or by the stroke itself. Until now, no studies investigating the relationship between mg-concentration, stroke severity and cognition during treatment course are available. Thus, this study aimed to investigate the relationship between mg-concentration and cognition of stroke patients.
Introduction Both Mental Fatigue (MF) and hypoxia impair multiple aspects of cognitive functioning. The decline in cognitive functioning in hypoxic conditions is associated with alterations in brain oxygenation and hemodynamic responses. These hemodynamic responses are preferably measured at the prefrontal cortex, an area of the brain that is known for its executive function and role in decision making, planning, attention and (short-term) memory. This study will investigate the role of prefrontal cortex oxygenation during the development of mental fatigue and during cognitive performances by altering the ambient oxygen availability through normobaric hypoxia (3800m; 12,9% O2) and normoxia. Methods Subjects will perform four trials in a sound-insulated climate chamber (20°C and 40% RH). Upon entry in the climatic chamber participants will adapt to the environment for 30 minutes. Next, they will perform a modified cognitive test battery "cognition", a fine motor task "Motor Performance Series" and a visuomotor-fitlight task before and after a 60-minute individualized Stroop task or control task (randomized. blinded, placebo controlled, counter-balanced, cross-over design). Nearinfrared spectroscopy (NIRS) will be used to assess hemodynamic changes (oxygenated hemoglobin (O2Hb), deoxygenated-hemoglobin (HHb) and total hemoglobin (tHb)) at the PFC. Hypotheses 1) MF will lead to earlier changes in the prefrontal NIRS-parameters (O2Hb, HHb, tHb) with lower oxygen availability. 2) The effects of MF on cognitive performance manifest itself to a greater extent with lower oxygen availability.3) Visuomotor performance declines to a greater extent due to MF with lower oxygen availability.
This project uses a hybrid trial design to evaluate two biomedical interventions targeting the gut-brain axis. One intervention is portable Transcutaneous Vagus Nerve Stimulator, tVNS, that is hypothesized to stimulate the autonomic nervous system, resulting in decreased inflammation and improved cognition. The second intervention is a probiotic supplement intended to replace gut bacteria that are associated with dysbiosis in persons with HIV and alcohol consumption.
This is a prospective, randomized clinical study to evaluate the feasibility and efficacy of a digital neurotherapy on depression, cognition, and quality of life in two groups of patients with major medical illness: 1) a sample of cancer survivors, and 2) a sample of patients with end stage kidney disease (ESKD) on dialysis.
This study applies a hypothesis-driven approach to examine the effects of chronic marijuana use on HIV-associated inflammation and its subsequent impacts on central nervous system function, with the goal of identifying the mechanisms through which cannabinoids modulate neurological disorders and other comorbidities in persons with HIV.
A prospective prevalence study recorded that up to 50% of adult patients with newly diagnosed epilepsy had at least one cognitive impairment before initiation of antiepileptic drug (AED). Multiple factors exist and interact in the same patient. Cognitive impairments may affect psychiatric (loss of self-esteem, anxiety, depression) and social status (e.g., vocational aptitude, educational). These factors in turn influence cognitive abilities in a triangular and bidirectional relationship. In addition, the type of epilepsy, development in childhood or cerebral ageing, antiepileptic treatments (AED, surgery) and etiology also have an impact on cognitive performances. The burden of these factors differs from patient to another and must be determined individually. Longitudinal follow-up seems to be crucial because it will allow us to highlight the change in the cognitive profile of newly diagnosed patients over time. The main objective is to compare the prevalence of cognitive impairment in patients with newly diagnosed epilepsy prior to the initiation of AED with healthy subjects matched on age, sex, manual laterality and socio-educational level. But also to compare the longitudinal evolution of the cognitive profile of patients with healthy controls (0 to 10 years) to determine, among the age of onset seizures, their etiology, the syndrome, the sex, the socio-educational level and the cognitive reserve, which one are related to the severity of cognitive disorders.
This study is carried on in Wuchang Hospital in Wuhan, China. The investigators plan to recruit 80 patients with COVID-19 and 80 matched healthy control. Using the design of case-control study, the study aims to assess the neurocognitive functions such as executive function and attentional bias in recovered patients with COVID-19 under normal and stress conditions, and to analyze the influencing factors of neurocognitive functions, such as mental health conditions, inflammation indicators and cardiopulmonary function.
Patients with bipolar disorder (BD) have a wide range of neurocognitive dysfunction, which lead to impaired psychosocial function and reduced quality of life. Therefore, improving neurocognitive function has become an important goal of BD treatment. Aiming at this, some clinical studies have been performed but failed to illustrate significant positive efficacies of pharmacological therapy or non-pharmacological therapy, which could attribute in part to insufficient understanding on the risk factors that affect the neurocognitive function of BD patients. Delayed diagnosis of BD is so common that a lot of patients receive long-term antidepressant treatment before of diagnosis of unipolar depression. There is controversy about whether antidepressant treatment in early stage would affect the neurocognitive function of BD patients. In view of the high prevalence of delayed diagnosis and the use of antidepressants, it is of great scientific significance and clinical value to clarify this matter and other factors that may potentially affect the neurocognitive function of BD patients.
Lack of patient knowledge about ECT (electroconvulsive therapy) is a leading cause of treatment fear with 60% of ECT patients reporting high levels of anxiety. The purpose of this study is to determine if using Virtual Reality (VR) to allow patients' to experience a virtual ECT education session before treatment is useful in lowering treatment anxiety and increasing knowledge about ECT if compared to standard treatment. In addition, measuring heart rate and blood pressure levels before ECT treatment will allow us to assess changes in anxiety levels. Individuals who choose to participate will be placed (participant will have a 50% chance to be placed in either group) to view either a virtual reality video to experience a virtual ECT session, or to receive standard preparation, i.e. a discussion with a psychiatrist. Before and after this session participants will be asked to complete a measurement of their anxiety level and knowledge about ECT (ECT Attitude & Knowledge Questionnaire). Just before ECT treatment, blood pressure, heart rate and anxiety level will be measured. Participants will also complete cognitive and depression assessments. This study will help to develop a relationship between healthcare providers and patients and their families to help with education before ECT treatment.
This research relates to the study of cognitive deficits related to various focal brain lesions and their localizations in the brain. it involves building a large database of behavioural responses measured during the performance of cognitive tasks in patients with focal brain injury, to allow to better understand function of brain.