Open AccessAbnormal dynamic functional connectivity after sleep deprivation from temporal variability perspective
Author(s) -
Sun Jinbo,
Zhao Rui,
He Zhaoyang,
Chang Mengying,
Wang Fumin,
Wei Wei,
Zhang Xiaodan,
Zhu Yuanqiang,
Xi Yibin,
Yang Xuejuan,
Qin Wei
Publication year - 2022
Publication title -
human brain mapping
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.005
H-Index - 191
eISSN - 1097-0193
pISSN - 1065-9471
DOI - 10.1002/hbm.25886
Subject(s) - default mode network , wakefulness , dynamic functional connectivity , functional magnetic resonance imaging , neuroscience , psychology , sleep deprivation , neuroimaging , resting state fmri , vigilance (psychology) , thalamus , audiology , medicine , electroencephalography , cognition
Sleep deprivation (SD) is very common in modern society and regarded as a potential causal mechanism of several clinical disorders. Previous neuroimaging studies have explored the neural mechanisms of SD using magnetic resonance imaging (MRI) from static (comparing two MRI sessions [one after SD and one after resting wakefulness]) and dynamic (using repeated MRI during one night of SD) perspectives. Recent SD researches have focused on the dynamic functional brain organization during the resting‐state scan. Our present study adopted a novel metric (temporal variability), which has been successfully applied to many clinical diseases, to examine the dynamic functional connectivity after SD in 55 normal young subjects. We found that sleep‐deprived subjects showed increased regional‐level temporal variability in large‐scale brain regions, and decreased regional‐level temporal variability in several thalamus subregions. After SD, participants exhibited enhanced intra‐network temporal variability in the default mode network (DMN) and increased inter‐network temporal variability in numerous subnetwork pairs. Furthermore, we found that the inter‐network temporal variability between visual network and DMN was negative related with the slowest 10% respond speed ( β = −.42, p = 5.57 × 10 −4 ) of the psychomotor vigilance test after SD following the stepwise regression analysis. In conclusion, our findings suggested that sleep‐deprived subjects showed abnormal dynamic brain functional configuration, which provides new insights into the neural underpinnings of SD and contributes to our understanding of the pathophysiology of clinical disorders.