Novelty seeking and reward dependence-related large-scale brain networks functional connectivity variation during salience expectancy

Human Brain Mapping
Shijia LiMartin Walter

Abstract

A salience network (SN) anchored in the anterior insula (AI) and dorsal anterior cingulate cortex (dACC) plays a key role in switching between brain networks during salience detection and attention regulation. Previous fMRI studies have associated expectancy behaviors and SN activation with novelty seeking (NS) and reward dependence (RD) personality traits. To address the question of how functional connectivity (FC) in the SN is modulated by internal (expectancy-related) salience assignment and different personality traits, 68 healthy participants performed a salience expectancy task using functional magnetic resonance imaging, and psychophysiological interaction analysis (PPI) was conducted to determine salience-related connectivity changes during these anticipation periods. Correlation was then evaluated between PPI and personality traits, assessed using the temperament and character inventory of 32 male participants. During high salience expectancy, SN-seed regions showed reduced FC to visual areas and parts of the default mode network, but increased FC to the central executive network. With increasing NS, participants showed significantly increasing disconnection between right AI and middle cingulate cortex when expecting h...Continue Reading

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Citations

Jul 17, 2020·Translational Psychiatry·Christina E WierengaWalter H Kaye
Jul 3, 2019·The American Journal of Drug and Alcohol Abuse·Chia-Chun HungChiang-Shan R Li
May 2, 2018·Journal of Parkinson's Disease·Craig F FerrisMalav Trivedi
Oct 22, 2019·Frontiers in Behavioral Neuroscience·Felicia von DüringMartin Walter
Aug 21, 2018·NeuroImage·Rongtao JiangJing Sui

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