The neural correlation of sustained attention in performing conjunctive continuous performance task

Abstract

Owing to great improvements in cognitive neuroscience, the study of brain functions during different types of cognitive tasks has attracted much attention. Recording event-related potentials (ERPs) is an appropriate tool for such a purpose, as it is noninvasive and affordable. Attention is among the most studied cognitive processes. In this study, a visual version of the conjunctive continuous performance task-visual was used to examine the differences of cognitive processes in target and nontarget stimuli. Twenty healthy individuals (average age: 23 years) participated in the study. Electroencephalogram signals were recorded from all participants during conjunctive continuous performance task-visual. After preprocessing, the ERPs were calculated by averaging the epochs that were time-locked to the stimulus onset. Then, the ERPs of the two groups of target and nontarget stimuli, from the aspects of differences in the P300 and N200 morphological features, were analyzed in three midline channels: Pz, Fz, and Cz. According to the results, the P300 amplitudes were significantly larger in the target than those in the nontarget stimuli. The P300 latencies were also larger in the target than in the nontarget stimuli, but the difference was only significant in the Pz channel ERPs. For the N200 component, the negativity of amplitudes was significantly more enhanced in the target than in the nontarget stimuli. However, for the N200 latencies, no significant difference was found based on the data obtained from the groups. Furthermore, the findings suggest that the distribution of the P300 component is more centroparietal for the target stimuli, and more centrofrontal for the nontarget ones. In addition, the distribution of the N200 component is more frontoparietal for both the target and nontarget stimuli.

Obsessive-Compulsive Disorder (OCD) is Associated with Increased Engagement of Frontal Brain Regions Across Multiple Event Related Potentials

“…The OCD group was found to show less negative frontal voltages in the P300 compared to HC, which is consistent with findings of several previous studies [23, 24, 81, 82]. An altered P300 has been suggested to point to disruptions in the functionality of the brain systems that are required to provide sustained attention [20, 83], and has been found to underpin clinical symptoms of waning attention in mental health conditions such as schizophrenia [84]. Individuals with OCD are also known to have deficits in cognitive processes of attention and selective attention [85, 86].…”

Obsessive–compulsive disorder (OCD) is associated with increased engagement of frontal brain regions across multiple event-related potentials

“…The OCD group was found to show less negative frontal voltages in the P300 compared to HCs, which is consistent with findings of several previous studies (Andreou et al, 2013 ; Gohle et al, 2008 ; Ischebeck et al, 2011 ; Mavrogiorgou et al, 2002 ). An altered P300 has been suggested to point to disruptions in the functionality of the brain systems that are required to provide sustained attention (Behzadnia, Ghassemi, Chermahini, Tabanfar, & Taymourtash, 2018 ; Linden, 2005 ), and has been found to underpin clinical symptoms of waning attention in mental health conditions such as schizophrenia (Ford, 1999 ). Individuals with OCD are also known to have deficits in cognitive processes of sustained and selective attention (Clayton, Richards, & Edwards, 1999 ; De Geus, Denys, Sitskoorn, & Westenberg, 2007 ).…”

Prospects of using event-related potentials in medical examination of military mental disorders

“…Так, компонент Р100, который является по ложительным потенциалом, имеющим мак симальную амплитуду в затылочных областях и появляющимся через 50-120 мс после предъ явления стимула, относят к группе зрительных ВП, отражает начальные этапы обработки зри тельной информации и может быть модулиро ван процессами внимания [23,27,43].…”