View clinical trials related to Cognition.
Filter by:The purpose is to study the effects of dopamine activity, using methylphenidate ingestion, on exercise and cognitive function over the course of a progressive cooling protocol. The investigators hypothesize that methylphenidate will minimize the previously reported impairment in exercise performance and cognitive function with mild hypothermia and cold stress (air temperature: 0˚C) compared to placebo, suggesting that dopamine activity preserves exercise and cognitive capacity with mild hypothermia.
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.
This study is investigating the effect of an acute dose of citalopram on emotional processing about the self. Using a parallel-group double-blind design, participants will be randomised to receive either an acute dose of citalopram or placebo. Participants will then complete a number of widely used computer-based cognitive tasks measuring emotional processing biases towards the self. This study has also been registered on OSF: https://osf.io/nhjvs/?view_only=b39c49bddfd543b99b627dc992e49b45
This study is investigating whether acute administration of citalopram is associated with a decrease in stress reactivity in healthy volunteers, compared to placebo administration. Using a parallel-group double-blind design, participants will be randomised to receive either an acute dose of citalopram or placebo. All participants will have come in for a screening visit. On the day of the research visit (following drug administration) participants will have completed a number of widely used computer-based cognitive tasks measuring emotional processing biases. They will then complete the Oxford Cognition Stress Task, a web-based acute stress induction paradigm, which is designed to induce mild transient increases in stress and arousal. Identifying early changes in stress reactivity following antidepressant treatment will increase the investigator's knowledge of how antidepressants operate, and provide putative targets to identify early response to antidepressants.
The purpose of this study is to determine the most effective dose of brief, non-invasive brain stimulation (repetitive transcranial magnetic stimulation, rTMS) for improving cognitive functions such as attention and memory as well as to improve the ability to recover from stressful situations (stress resilience).
Parkinson's disease (PD) is a difficult to treat condition that impairs mobility and thinking. It is not fully treated by drugs and surgery. Two priority issues for most people with PD are "OFF-time" and Cognitive impairment. Even under best medical management, 74% of people with PD experience "OFF-time," which is when medications are just not working right. OFF-time severely impacts both quality of life and thinking. Cognitive problems are found even in newly diagnosed people with PD and are very difficult to treat. However, the investigators' research has shown that partnered dance-aerobic exercise (PDAE) reduces OFF-time on the official test for OFF-time of the Movement Disorders Society, the Movement Disorders Society Unified Parkinson Disease Rating Scale-IV, (MDS-UPDRS-IV). PDAE improves other symptoms too. Benefits of the therapy have lasted for at least one-month after PDAE sessions stopped. PDAE provides aerobic exercise during an improvisational, cognitively-engaging physical activity. Cognitive engagement is a critical component of PDAE. Previous research showed PDAE improved spatial cognition, the ability to navigate, to mentally picture shapes and paths in the mind and to know the relationships between objects, people and places. Also, the investigators showed with imaging of the brain using a magnet in a scanner that twice weekly PDAE training increases activity in brain regions used in thinking and decision making. The investigators know that exercise benefits mobility and cognitive problems. The investigators even think exercise might protect brain cells in people with PD. But no one has really been able to show with biomarkers that exercise is protective of brain cells in humans.
In this randomized controlled trial, we aim to investigate whether the avoidance of mechanical ventilation by application of nonintubated thoracoscopic surgery improves intraoperative cerebral oxygenation and postoperative cognition recovery for patients undergoing thoracic surgery.
Behavioural activation (BA) is widely accepted as an efficacious treatment for depression. It has been suggested that several depression treatments work via early changes in emotional processing (e.g. affective bias in the processing of facial expressions) and that these could help predict treatment success, but it has not yet been examined whether the same applies in behavioural interventions. The investigators will examine how BA affects early emotional information processing in participants who are currently experiencing low mood, to see whether this can predict eventual changes in mood and to gain a better understanding of the treatment mechanisms of BA. Participants will be in three groups undergoing either behavioural activation, or activity monitoring alone (active control) for 4 weeks, or they will be on a waiting list (passive control). The investigators will also examine whether other factors, such as anxiety, social support and environmental reward, can predict the success of BA. This could help us understand how BA works and who may be most suitable for this intervention.
Considerable research has documented the optimization utility of stimulants in sleep deprived Soldiers and aviators, however, the research for enhancement purposes has demonstrated mixed results. One significant factor that may influence enhancement properties is general intelligence such that low performers exhibit stronger enhancement effects than high performers. The objective of this study is to determine whether stimulants (specifically, modafinil and Adderall) can enhance Soldier cognitive abilities and performance on military tasks. To do so, a within-subjects design will be employed using healthy, rested Soldiers and measuring performance on a set of basic cognitive assessments and operationally relevant tasks.
This study will investigate whether administration of a single dose of the serotonin receptor subtype 4 (5-HT4) partial agonist prucalopride has effects on emotional processing and non-emotional cognition in healthy volunteers, compared to placebo administration. Using an experimental medicine approach, the effects of prucalopride on cognitive biomarkers of antidepressant action will be characterised. In a double-blind design, participants will be randomised to receive a single dose of either prucalopride (1mg) or placebo. All participants will come for a Screening Visit to ensure their suitability for the study. If they meet study criteria, they will be invited to a Research Visit, where they will receive the study medication and wait for two hours while the drug reaches peak levels. After two hours they will be asked to complete a series of computer-based tasks measuring emotional, non-emotional cognitive processing, and reward processing. The primary study hypothesis is that acute prucalopride administration will have positive effects on processing facial expressions of emotion. Secondary hypotheses are that acute prucalopride administration will affect other measures of emotional processing, and non-emotional cognition.