Parallel distributed networks resolved at high resolution reveal close juxtaposition of distinct regions

Journal of Neurophysiology
Rodrigo M BragaRandy L Buckner

Abstract

Examination of large-scale distributed networks within the individual reveals details of cortical network organization that are absent in group-averaged studies. One recent discovery is that a distributed transmodal network, often referred to as the "default network," comprises two closely interdigitated networks, only one of which is coupled to posterior parahippocampal cortex. Not all studies of individuals have identified the same networks, and questions remain about the degree to which the two networks are separate, particularly within regions hypothesized to be interconnected hubs. In this study we replicate the observation of network separation across analytical (seed-based connectivity and parcellation) and data projection (volume and surface) methods in two individuals each scanned 31 times. Additionally, three individuals were examined with high-resolution (7T; 1.35 mm) functional magnetic resonance imaging to gain further insight into the anatomical details. The two networks were identified with separate regions localized to adjacent portions of the cortical ribbon, sometimes inside the same sulcus. Midline regions previously implicated as hubs revealed near complete spatial separation of the two networks, displaying ...Continue Reading

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Citations

Sep 8, 2019·Nature Reviews. Neuroscience·Randy L Buckner, Lauren M DiNicola
Feb 13, 2020·Journal of Neurophysiology·Lauren M DiNicolaRandy L Buckner
May 1, 2019·Nature Communications·Randy L Buckner, Daniel S Margulies
May 19, 2020·The European Journal of Neuroscience·Anna PajkertCarsten Finke
May 28, 2020·Journal of Cognitive Neuroscience·Baptiste GauthierVirginie van Wassenhove
Sep 17, 2020·Autism Research : Official Journal of the International Society for Autism Research·Olessia JouravlevEvelina Fedorenko
Jul 8, 2020·Proceedings of the National Academy of Sciences of the United States of America·Evan M GordonSteven M Nelson
Nov 11, 2019·Brain Topography·Lucina Q UddinR Nathan Spreng
Dec 23, 2020·Nature Neuroscience·Steven PoulterColin Lever
Jan 24, 2021·NeuroImage·Elvis DohmatobBertrand Thirion
Oct 2, 2019·NeuroImage·Mehraveh SalehiR Todd Constable
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Apr 6, 2021·Current Opinion in Behavioral Sciences·Olivia Viessmann, Jonathan R Polimeni
May 13, 2021·Nature Communications·Adam SteelCaroline E Robertson
May 22, 2021·Biological Psychology·Brian KrausShinobu Kitayama
Jul 2, 2021·Proceedings of the National Academy of Sciences of the United States of America·Lars Jonasson StiernmanAnna Rieckmann
Jul 18, 2021·Proceedings of the National Academy of Sciences of the United States of America·Josef ParviziMatthew Markert
Aug 19, 2021·Proceedings of the National Academy of Sciences of the United States of America·Annie ZhengNico U F Dosenbach
Jan 1, 2022·Proceedings of the National Academy of Sciences of the United States of America·Kevin J ClancyWen Li

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Methods Mentioned

BETA
surgical resection

Software Mentioned

fsl
GRAPPA
3dTproject
3dSetUpGroupInCorr
Connectome Workbench
FSL FUGUE
FNIRT
AFNI
iProc
MCFLIRT

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