title: Graph theoretical analysis of sedation's effect on whole brain functional system in school-aged children.
abstract: The neurophysiological mechanism underlying sedation, especially in school-aged children, remains largely unknown. The recently emerged resting-state functional magnetic resonance imaging (rsfMRI) technique, capable of delineating brain's functional interaction pattern among distributed brain areas, proves to be a unique and powerful tool to study sedation-induced brain reorganization. Based on a relatively large school-aged children population (n=28, 10.3±2.6 years, range 7-15 years) and leveraging rsfMRI and graph theoretical analysis, this study aims to delineate sedation-induced changes in brain's information transferring property from a whole brain system perspective. Our results show a global deterioration in brain's efficiency properties (p=0.0085 and 0.0018, for global and local efficiency, respectively) with a locally graded distribution featuring significant disruptions of key consciousness-related regions. Moreover, our results also indicate a redistribution of brain's information-processing hubs characterized by a right and posterior shift as consistent with the reduced level of consciousness during sedation. Overall, our findings inform a sedation-induced functional reorganization pattern in school-aged children that greatly improve our understanding of sedation's effect in children and may potentially serve as reference for future sedation-related experimental studies and clinical applications.
authors.affiliation: Shenzhen Maternal and Child Healthcare Hospital, Shenzhen, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wei
authors.forename: Sarael
authors.initials: S
authors.lastname: Alcauter
authors.forename: Ke
authors.initials: K
authors.lastname: Jin
authors.forename: Zi-Wen
authors.initials: ZW
authors.lastname: Peng
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
mesh_terms: D000293:Adolescent; D001921:Brain / Q000187:drug effects* / Q000502:physiology*; D001931:Brain Mapping; D002648:Child; D005260:Female; D006801:Humans; D006993:Hypnotics and Sedatives / Q000494:pharmacology*; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D008959:Models, Neurological
chemical_list: D006993:Hypnotics and Sedatives