首页|Interaction Between Memory Load and Experimental Design on Brain Connectivity and Network Topology

Interaction Between Memory Load and Experimental Design on Brain Connectivity and Network Topology

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The conventional approach to investigating functional connectivity in the block-designed study usually concatenates task blocks or employs residuals of task activa-tion.While providing many insights into brain functions,the block design adds more manipulation in functional network analysis that may reduce the purity of the blood oxygenation level-dependent signal.Recent studies utilized one single long run for task trials of the same condition,the so-called continuous design,to investigate functional connectivity based on task functional magnetic resonance imaging.Con-tinuous brain activities associated with the single-task condi-tion can be directly utilized for task-related functional con-nectivity assessment,which has been examined for working memory,sensory,motor,and semantic task experiments in previous research.But it remains unclear how the block and continuous design influence the assessment of task-related functional connectivity networks.This study aimed to dis-entangle the separable effects of block/continuous design and working memory load on task-related functional con-nectivity networks,by using repeated-measures analysis of variance.Across 50 young healthy adults,behavioral results of accuracy and reaction time showed a significant main effect of design as well as interaction between design and load.Imaging results revealed that the cingulo-opercular,fronto-parietal,and default model networks were associated with not only task activation,but significant main effects of design and load as well as their interaction on intra-and inter-network functional connectivity and global network topology.Moreover,a significant behavior-brain associa-tion was identified for the continuous design.This work has extended the evidence that continuous design can be used to study task-related functional connectivity and subtle brain-behavioral relationships.

Working memoryFunctional connectivityNetwork topologyBlock designContinuous designMemory load

Heming Zhang、Xin Di、Bart Rypma、Hang Yang、Chun Meng、Bharat Biswal

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The Clinical Hospital of Chengdu Brain Science Institute,MOE Key Laboratory for Neuroinformation,Center for Information in Medicine,School of Life Science and Technology,University of Electronic Science and Technology of China,Chengdu 611731,China

Department of Biomedical Engineering,New Jersey Institute of Technology,Newark 07102,USA

Department of Psychology,University of Texas at Dallas,Dallas 75390,USA

all participants in the study.This work was supported by the National Natural Science Foundation of Chinaall participants in the study.This work was supported by the National Natural Science Foundation of ChinaProvincial Natural Science Foundation of Sichuan

62071109618714202022NSFSC0504

2023

10.1007/s12264-022-00982-y

神经科学通报(英文版)
中国科学院上海生命科学研究院

神经科学通报(英文版)

CSTPCDCSCD
影响因子：0.741
ISSN：1673-7067
年,卷(期)：2023.39(4)
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