View clinical trials related to Cognitive Dysfunction.
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This study attempts to replicate the findings published in Nature Medicine by Nation and colleagues (2019). By using a large observational cohort (DZNE - Longitudinal Cognitive Impairment and Dementia Study; DELCODE) consisting of cognitively healthy individuals, individuals with subjective cognitive decline, mild cognitive impairment, and dementia due to Alzheimer's disease, an association between the blood-brain barrier and cognitive dysfunction is investigated. The integrity of the blood-brain barrier is investigated by using a novel MRI protocol as well as a novel biomarker in the cerebrospinal fluid.
This is a sequential mixed study to test the hypothesized models with seven hypotheses of the relationship between cognitive deficit (subject and objective) and neuropsychiatric symptoms (NPS) among persons with mild cognitive impairment (PwMCI). The study will also examine the psychometric properties of the Chinese version of Mild Behavioural Impairment -Checklist (MBI-C).
The investigators will conduct tau positron emission tomography (PET) scans on 125 adults using the radiopharmaceutical Flortaucipir F18 ([18F]AV-1451). This will allow the investigators to determine tau deposition across adults of different ages and assess the relationship of current tau burden to cognitive function and amyloid deposition collected over the previous 10-year interval.
In this research study we want to learn more about whether taking Niagen, a daily supplement containing a form of Vitamin B3, will improve cognitive function, mood, and daily activity in people with Subjective Cognitive Decline (SCD) or Mild Cognitive Impairment (MCI).
This study investigates the utility of Goal Management Training (GMT) in patients with post-traumatic stress disorder (PTSD), in order to determine if this treatment is effective in improving cognitive function in patients with frontal-temporally mediated brain dysfunction. Specifically, the primary aim of this study is to examine whether a standardized 9-week program of GMT results in durable improvements in cognitive functioning relative to a wait-list control group. A secondary aim will be to determine whether participation in the GMT group is associated with long-term functional improvements. It is hypothesized that at post-treatment, participants with PTSD assigned to the GMT groups will show greater improvement in neuropsychological test performance and greater functional improvement compared to those in the wait-list group; these gains are expected to be maintained at 3 month follow-up.
A better understanding of the injury patterns, injury severity, risk profiles, consequences and impact of Traumatic Brain Injury (TBI) in the elderly population is necessary due to the increasing incidence and prevalence of TBI in this population and its high economic impact on society. Therefore, this study aims at describing the long-term consequences of TBI. In order to achieve that goal, injury patterns, injury severity and risk profiles for TBI in the elderly will be mapped. Moreover, a retrospective assessment of brain damage, co-morbidities and post-traumatic history, and a prospective assessment of cognitive functions and quality of life in a 20 years range after TBI will be performed. Finally, a statistical correlation of TBI and different types of neurodegenerative diseases, and an economic costs analysis will be done. All the obtained results will be used to develop a new prognostic tool for the course of the outcomes of TBI in the elderly population.
This study evaluates a novel arm restraint compared with traditional soft wrist restraints in older critically ill patients. The primary outcome is upper extremity mobility measured by actigraphy, and secondary outcomes include sedation, agitation, satisfaction, and acceptability.
Thus far no large randomized trial has demonstrated a correlation between screening and improved outcomes. This would need to be done to gain widespread acceptance of screening and case finding programs. Early detection of cognitive impairment could potentially result in the appropriate treatment of reversible cognitive impairment conditions or earlier initiation of pharmacological interventions for the management of a variety of other dementia or Mild Cognitive Impairment (MCI) conditions. A screening approach that reduces the number of false positive screens would improve the comfort level of physicians and patients with cognitive screening programs. The investigators propose to use the Self-Administered Gerocognitive Examination (SAGE) and the Electronic Self-Administered Gerocognitive Examination (eSAGE) to identify patients who score in the cognitive impairment range during an office visit with their primary care provider. Conversation with an individual who knows the patient well (if possible) will be performed to ascertain a significant change in the patient's cognitive skills over the previous year. The investigators wish to determine if screening for cognitive impairment in this way leads to new diagnoses and management outcomes compared to a group of primary care providers who use their current usual method in screening for cognitive impairment during office visits.
In Hong Kong, methamphetamine use is common and cocaine use has increased steadily over the past few years. While the use of ketamine decreased from 35.8% in 2015 to 13.9% in 2017, methamphetamine and cocaine have become the most commonly used psychotropic substances and account for more than 50% of drug abuses cases in 2017. Among all stimulants, methamphetamine is most commonly used because it releases three times more dopamine than cocaine and the effects can last from eight to twelve hours, compared to two hours for cocaine. On top of its extreme effects, methamphetamine is relatively inexpensive, making it even more accessible to the young population. Misuse of methamphetamine has long been associated with profound psychological and cognitive disturbance. In reviewing the cognitive data from reasonably well-matched groups of chronic methamphetamine users and healthy controls, the majority of studies have found that chronic methamphetamine users had lower scores on at least some cognitive tests, although some studies are exceptions with entirely nonsignificant differences. A meta-analysis of 17 cross-sectional studies found that chronic methamphetamine users demonstrated significantly lower cognitive scores than healthy controls. The effects were largest for measures of learning, executive functions, memory, and processing speed, although the majority of cognitive domains significantly differed between the groups. Concerns has been emerging regarding the methodology of the aforementioned results. In particular, the appropriateness of using healthy controls to examine the cognitive effects of stimulant use has been questioned. Much of the published research has fallen victim to using controls with significant baseline differences from the chronic stimulant users, such as years of education. In addition, none of the studies available provided scatter plots of their cognitive data to evaluate the overlap in performance between chronic stimulant users and healthy controls. In fact, many chronic stimulant users have normal cognitive function when compared with normative data. Therefore, the use of the term 'impairment' or 'deficit' in many studies is not fully justified. Another limitation is that it cannot differentiate cognitive weaknesses that may predate stimulant use from those that result from it. Notably, longitudinal studies have shown that childhood deficits in executive function can predict drug abuse in adolescence, suggesting that at least some of the cognitive weaknesses pre-exist in chronic stimulant user. These and other limitations provoked a conclusion that the evidence for cognitive deficits in chronic stimulant users is weak. In order to overcome the methodological issues observed in previous cross-sectional studies, we propose to conduct a prospective studies to determine the change in cognitive function among stimulant users over time.