View clinical trials related to Cognitive Impairment.
Filter by:The purpose of this study is to examine the effects of blood pressure medications on cognition and blood flow in hypertensive elderly patients with cognitive impairment. The hypothesis is that treatment with an angiotensin receptor blocker (ARB) or an angiotensin-converting enzyme inhibitor (ACEI) will be associated with a slower rate of further cognitive decline, improved cerebral blood flow and its regulation, and preserved physical function as compared to treatment with a diuretic (HCTZ), independent of blood pressure level.
The purpose of this study is to: 1) evaluate the reliability and validity of EMS screening for depression and cognitive impairment and 2) to develop a pilot ED intervention program to address the needs of older adults found to be at risk for depression and cognitive impairment.
A recent meta-analysis that included over 29.000 individuals found that the odds ratio (OR) of individuals with high brain reserve compared to low was 0.54 (p < 0.0001), a risk decrease of 46%. Among the factors that influence cognitive reserve, mentally stimulating activities was the most robust factor after controlling for education, age, occupation and other potential confounds. The brain reserve effect was sustained over a median longitudinal follow-up of 7 years. It would be interesting to detect whether a complex cognitive training could show similar effects on the cognitive abilities of patients with mild Alzheimer's disease (AD) and mild cognitive impairment (MCI) as it has been reported in previous studies based on mentally stimulating activities analysis. The hypothesis is that a complex cognitive training alters the neural networks in both subject groups and this alteration is associated with improvement or stabilization of cognitive and non-cognitive function. The investigator will perform a complex cognitive training program. Twenty patients with mild AD and twenty four patients with MCI will be recruited in this study. The patients will be randomised in control- and treatment groups.Additionally indirect effects on non-cognitive functions will be evaluated in caregivers of the patients. The investigators expect that the cognitive and non-cognitive abilities will be changed during the cognitive training. The investigators also expect differences between treatment and control groups.
The primary objective of this study is to conduct a randomized, controlled trial to determine whether engaging in mental activity or exercise, either alone or in combination, improves cognitive function in non-demented, inactive older adults who self-report a recent decline in memory or thinking. In addition, we, the researchers at the University of California, San Francisco, plan to seek funding to follow subjects over time to determine whether these interventions are associated with changes in rate of cognitive decline or risk of dementia after the intervention period has ended.
Cognitive and emotional symptoms are often seen in the acute phase of a stroke. The prevalence of such symptoms later and the mechanisms explaining the symptoms are not fully known. The causes of poststroke dementia are likely to be multifactorial (Cerebrovascular Diseases 2006). The investigators want to include all patients with first ever stroke without significant cognitive decline prior to the stroke (IQCODE cut-off 3,7) and follow them up for one year. At baseline we will make stroke classifications, measure neurological deficits according to NIHSS, evaluate cognitive and emotional function and make registrations of vascular risk factors, including precerebral color duplex scan with measurement of IMT in CCA. The investigators will then randomize the patients into multifactorial vascular-risk-factor-intervention in the hospital or care as usual in the primary health care. 8-12 months after stroke onset, survivors will undergo new examinations to evaluate neurological, cognitive and emotional functions, as well as MRI and SPECT.
Cognitive dysfunction following chemotherapy is an adverse treatment effect that impacts the quality of life for many cancer survivors receiving this adjuvant therapy. A strong body of evidence now indicates that that the initiation of a regular exercise program, at levels that are readily achievable by most adults (3-5 d/wk, 30-45 min/session), can improve cognitive function. Importantly, the domains of cognitive function that are enhanced by exercise participation are the same domains that are negatively affected by chemotherapy. Accordingly, we propose a 2 year research program that seeks to develop and test a safe, simple, and effective exercise intervention to optimize cognitive function following chemotherapy. To begin this research, we will: 1) conduct a randomized exercise intervention trial among cancer survivors that report persistent cognitive problems following chemotherapy (n=60), 2) explore possible mediators and moderators of the intervention on cognition in order to begin to understand how the intervention may work and for whom it may be most effective, and 3), conduct a cross-sectional study comparing cancer survivors enrolled in the trial (n=60) and matched controls (n=40) to evaluate the cognitive status among survivors in the intervention. We hypothesize that six-months of regular exercise will enhance cognitive function among cancer survivors, and that cancer survivors reporting cognitive dysfunction will have lower objectively measured cognitive performance than adults who have not received chemotherapy. To our knowledge this study would be the first to examine the influence of regular exercise participation on cognitive function among cancer survivors that experienced cognitive difficulties following chemotherapy.
A combined strategy of Richmond Agitation and Sedation Scale (RASS) clinical targeting plus bispectral index (BIS) guided sedation in mechanically ventilated, critically ill patients will decrease time on mechanical ventilation, decrease the duration of intensive care unit (ICU) delirium and coma, and will improve subacute neurocognitive function when compared to sedation guided by RASS targeting alone.
Our hypothesis is that adding midazolam and/or fentanyl to propofol sedation for elective outpatient colonoscopy increases cognitive impairment at hospital discharge without improving intraoperative conditions or reducing intraoperative side-effects. 200 healthy patients aged 18 years or older will be randomised to receive propofol or propofol plus midazolam and/or fentanyl. Cognitive impairment will be tested at hospital discharge using Cogstate computerised testing software.
The purpose of this research is to evaluate the usefulness of memantine, compared to placebo (sugar pill), for the treatment of cognitive impairment in patients with idiopathic Parkinson's disease (PD) and dementia. Memantine is used as a safe and effective treatment for patients with Alzheimer's disease. Cognitive impairment includes concentration and memory difficulties. We will look at how well this medication helps your cognitive impairment, how well you tolerate this medication (including its effects on your motor symptoms of PD) your activities of daily living, your emotions, and any medical conditions you might have. We will interview a person you choose as your "informant".
The purpose of this study is to evaluate the cerebral blood flow in subjects with high and low activity in the renin-angiotensin system (RAS).The renin-angiotensin system is a hormone system which is involved in the regulation of the blood pressure. Earlier studies have shown that high RAS activity is associated with a more pronounced cognitive impairment during hypoglycaemia compared to low RAS activity in both type 1 diabetic patients and healthy volunteers. We intend to examine brain activity by oxygen-15 labelled water-PET scanning during hypoglycaemia in response to cognitive function testing in 20 healthy male volunteers with high and low RAS activity, respectively