The authors would like to thank Danielle Mizuiri and Anne Findlay for collecting much of the MEG data, and all members and collaborators of the Biomagnetic Imaging Laboratory for their support. This work was supported by the National Natural Science Foundation of China under Grant 62007013, 61772380, and by NIH grants R01EB022717 , R01DC013979 , R01NS100440 , R01DC176960 , R01DC017091 , R01AG062196 UCOP-MRP-17-454755, and T32EB001631 from the NIBIB,and by the Major Project for Technological Innovation of Hubei Province under Grant 2019AAA044 and Science & Technology Major Project of Hubei Province (Next-Generation AI Technologies, no. 2019AEA170) , and by the European Research Council (ERC) under the European Union”s Horizon 2020 research and innovation programme (Grant agreement no. 758985 ). AH acknowledges scholarship support from the Machine Learning/Intelligent Data Analysis research group at Technische Universität Berlin and partial support from the Berlin International Graduate School in Model and Simulation based Research (BIMoS), the Berlin Mathematical School (BMS), and the Berlin Mathematics Research Center MATH+.