View clinical trials related to Neurosciences.
Filter by:Reality-monitoring characterizes the ability to determine whether information was perceived in the environment or only imagined . Impaired reality-monitoring abilities have been associated with hallucinations in patients with schizophrenia and patients with Parkinson's disease. The investigators hypothesize a link between dopaminergic (DA) transmission and reality-monitoring.
This monocentric methodological study aims at optimizing advanced MR sequences for image quality (reduced artefacts, signal to noise ratio, acquisition time, stability of quantitative measurements) on a new MR unit dedicated to research in clinical and cognitive neuroscience.
This proposal aims to study the role that the dorsal prefrontal cortex plays in human social cognition.
The aim of this study is to investigate the effects of different domains of executive function (EF) during dual task walking condition on brain activation and gait performance in healthy adults. There are two experiments will be conducted in this study. Experiment 1 is a pilot study to determine the same level of difficulty in 3 EF domains, including inhibition, working memory and cognitive flexibility. Experiment 2 is carried out to investigate the effects of 3 different domains of EF which difficulties are controlled on gait performance and brain activation in dual task condition. 10 subjects will perform Stroop test (2s/3s/4s to change question), backward digit spans (3/4/5 digits) and naming test in Experiment 1. In Experiment 1, the primary outcome is the correct response speed (CRS) while secondary outcome will be the brain activity. In Experiment 2, 30 subjects will perform the single cognitive task A (SCTA, Stroop test), single cognitive task B (SCTB, backward digit spans), single cognitive task C (SCTC, naming test), single walking task (SWT), dual task A (DTA, walking while performing cognitive task A), dual task B (DTB, walking while performing cognitive task B) and dual task C (DTC, walking while performing cognitive task C). The CRS, gait performance, brain activity and the dual task costs (DTC) will be recorded in the Experiment 2. Brain activities in prefrontal cortex (PFC), premotor cortex (PMC) and supplementary motor area (SMAs) will be measured by functional near-infrared spectroscopy (fNIRS) during this study. One-way ANOVA with Tukey post-hoc test will be performed to establish the effect of different type of executive task on CRS or the brain activity. The differences of gait parameters and brain activity in different condition in the Experiment 2 will be examined by one-way ANOVA with repeated measured. Furthermore, the Pearson correlation coefficient will be used to examine the correlation of brain activation and executive function performance or gait parameters.
This study aims to investigate the brain activation during different motor patterns, including motor execution (ME), motor imagery (MI), action observation (AO) and mirror visual feedback (MVF). In addition, the relations between brain activation and motor performance will also be explored. This study includes two parts, which are upper limb and lower limb part. While executing all the tasks, brain activation in primary motor cortex(M1), premotor cortex(PMC), and supplementary motor cortex(SMA) will be monitored by functional near-infrared spectroscopy. One-way ANOVA with repeated measure will be used to detect the differences of brain activation level between each mode. Pearson correlation coefficient will be used to determine the relations of brain activation and motor performance.
Emerging adults are a particularly vulnerable group for experiencing the immediate and potentially lifelong negative impacts of habitual cannabis use, and trends suggest that cannabis use disorder (CUD) will soon escalate in this population. The proposed research will combine clinical pharmacology, non-invasive brain stimulation, and neuroimaging techniques to establish the brain mechanisms of cannabinoid-impaired decision-making processes in emerging adults with CUD. Results from this project will inform CUD prevention/treatment efforts in this high-risk group and address a growing public health concern.