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Simultaneous spatial-temporal decomposition for connectome-scale brain networks by deep sparse recurrent auto-encoder

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Abstract

Exploring the spatial patterns and temporal dynamics of human brain activity has been of great interest, in the quest to better understand connectome-scale brain networks. Though modeling spatial and temporal patterns of functional brain networks have been researched for a long time, the development of a unified and simultaneous spatial-temporal model has yet to be realized. For instance, although some deep learning methods have been proposed recently in order to model functional brain networks, most of them can only represent either spatial or temporal perspective of functional Magnetic Resonance Imaging (fMRI) data and rarely model both domains simultaneously. Due to the recent success in applying sequential auto-encoders for brain decoding, in this paper, we propose a deep sparse recurrent auto-encoder (DSRAE) to be applied unsupervised to learn spatial patterns and temporal fluctuations of brain networks at the same time. The proposed DSRAE was evaluated and validated based on three tasks of the publicly available Human Connectome Project (HCP) fMRI dataset, resulting with promising evidence. To the best of our knowledge, the proposed DSRAE is among the early efforts in developing unified models that can extract connectome-scale spatial-temporal networks from 4D fMRI data simultaneously.

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Acknowledgments

We would like to thank the Human Connectome Project (HCP) for sharing the datasets used in this work.

Funding

This work was supported by General Program of National Natural Science Foundation of China (Grant No. 61876021), Beijing Municipal Natural Science Foundation (Grant No. 4212037), the program of China Scholarships Council (No. 201806040083), National Institutes of Health (DA033393, AG042599) and National Science Foundation (IIS-1149260, CBET-1302089, BCS-1439051 and DBI-1564736).

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Contributions

Author contributions included conception and study design (XW and TL), data acquisition (QD), statistical analysis (QL and QD), interpretation of results (QL and TL), drafting the manuscript work or revising it critically for important intellectual content (QL, QD, FG, NQ and TL) and approval of final version to be published and agreement to be accountable for the integrity and accuracy of all aspects of the work (All authors).

Corresponding author

Correspondence to Tianming Liu.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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The authors declare that they have no conflict of interest. Informed consent was obtained from all individual participants included in the study.

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Qing Li and Qinglin Dong are Co-first authors; Xia Wu and Tianming Liu are Co-corresponding authors

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Li, Q., Dong, Q., Ge, F. et al. Simultaneous spatial-temporal decomposition for connectome-scale brain networks by deep sparse recurrent auto-encoder. Brain Imaging and Behavior 15, 2646–2660 (2021). https://doi.org/10.1007/s11682-021-00469-w

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  • DOI: https://doi.org/10.1007/s11682-021-00469-w

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