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Wednesday 13 March 2019

Brain Activity during the Concentration Task in Normal Male Subjects by Functional Magnetic Resonance Imaging

                               http://austinpublishinggroup.com/neuropsychiatry-cognitive-science/


Visuospatialcognitive functioning is very important in everyday activities. However, in psychiatric diseases such as schizophrenia and dementia, this function is impaired, and patients with these diseases are inconvenienced in daily life.Various visuospatial tasks were used to investigate the brain function in previous studies. Using the Trail Making Test (TMT), Shibuya-Tayoshi, et al. reported that this task activates the prefrontal cortex during Near-Infrared Spectroscopy (NIRS), and Nakahachi, et al. suggested that this task is appropriate for examining the visuospatial working memory and functionallocalization. Using a task related to spatial positioning of a dot, Silver, et al. examined visuospatial working memory and noted that working memory in schizophrenia was impaired, and Lee, et al. compared trials with errors in maintaining spatial working memory between normal subjects and schizophrenic patients using functional Magnetic Resonance Imaging (fMRI) and NIRS.


Theyreported a reduced functional asymmetry of the prefrontal cortex during a spatial working memory task in schizophrenic patients. In addition, Henseler, et al. used fMRI and reported that schizophrenic patients showed impairments in activation of the superior parietal cortex and in maintaining visuospatial information. Kirsch, et al. also reported that during a maze task, both sides of the prefrontal cortex were activated on fMRI. A variety of tasks, such as the Wisconsin Card Sorting Test and visual object contracting tasks are used to investigate the visuospatial cognitive function. These tasks have been psycho physiologically examined, the localization of the brain function and the validity of these tasks have been demonstrated, and their use as markers of psychiatric disorders is expected in the future.




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An Evaluation of the Role of fMRI in Patients with Lower Urinary Tract Dysfunction

                                                 https://www.austinpublishinggroup.com/urology/ Patientswith Lower Urinary Tr...