DIFFERENTIAL PATTERN OF BRAIN FUNCTIONAL CONNECTOME IN OBSESSIVE-COMPULSIVE DISORDER VERSUS HEALTHY CONTROLS
EXCLI JOURNAL
Authors: Yazdi-Ravandi, Saeid; Akhavanpour, Hassan; Shamsaei, Farshid; Matinnia, Nasrin; Ahmadpanah, Mohammad; Ghaleiha, Ali; Khosrowabadi, Reza
Abstract
Researchers believe that recognition of functional impairment in some of brain networks such as frontal-parietal, default mode network (DMN), anterior medial prefrontal cortex (MPFC) and striatal structures could be a beneficial biomarker for diagnosis of obsessive-compulsive disorder (OCD). Although it is well recognized brain functional connectome in OCD patients shows changes, debate still remains on characteristics of the changes. In this regard, little has been done so far to statistically assess the altered pattern using whole brain electroencephalography. In this study, resting state EEG data of 39 outpatients with OCD and 19 healthy controls (HC) were recorded. After, brain functional network was estimated from the cleaned EEG data using the weighted phase lag index algorithm. Output matrices of OCD group and HCs were then statistically compared to represent meaningful differences. Significant differences in functional connectivity pattern were demonstrated in several regions. As expected the most significant changes were observed in frontal cortex, more significant in frontal-temporal connections (between F3 and F7, and T5 regions). These results in OCD patients are consistent with previous studies and confirm the role of frontal and temporal brain regions in OCD.
The nationwide register-based prevalence of intellectual disability during childhood and adolescence
JOURNAL OF INTELLECTUAL DISABILITY RESEARCH
Authors: Westerinen, H.; Kaski, M.; Virta, L. J.; Kautiainen, H.; Pitkala, K. H.; Iivanainen, M.
Abstract
Background Many studies have evaluated the prevalence of intellectual disability (ID) by focusing on different ages during childhood and adolescence. Although the prevalence of ID is higher in older age groups, how cumulative prevalence increases, and what level it reaches before adulthood, remains unclear. Method We used Care Register for Health Care to retrieve information on individuals born in 1996-2007 with any of the inclusion diagnoses of ID (F7 group and/or aetiological diagnoses) for the period 1996 to 2013. The cumulative prevalence was calculated as percentages for every age based on Finnish population data. Results The registration of new diagnoses of ID continued steadily throughout the developmental years. The cumulative prevalence reached 1.19% by age 17.5 among those born in 1996. Later-born age groups appeared to receive their first ID diagnoses earlier in childhood. Those born in 1999 reached a cumulative prevalence of 1.21% already by age 14.5. Of all those with ID, 67% had an F7 diagnosis only, 42% had an aetiological diagnosis only and 9% had both diagnoses. Conclusions Cumulative prevalence of ID by year, until the age of 18, will provide a better estimate and understanding of the prevalence of ID than a point prevalence at any one point during the developmental years.