Long-distance amplitude correlations in the high γ band reveal segregation and integration within the reading network.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
Juan R VidalJean-Philippe Lachaux

Abstract

Reading sentences involves a distributed network of brain regions acting in concert surrounding the left sylvian fissure. The mechanisms of neural communication underlying the extraction and integration of verbal information across subcomponents of this reading network are still largely unknown. We recorded intracranial EEG activity in 12 epileptic human patients performing natural sentence reading and analyzed long-range corticocortical interactions between local neural activations. During a simple task contrasting semantic, phonological, and purely visual processes, we found process-specific neural activity elicited at the single-trial level, characterized by energy increases in a broad gamma band (40-150 Hz). Correlation analysis between task-induced gamma-band activations revealed a selective fragmentation of the network into specialized subnetworks supporting sentence-level semantic analysis and phonological processing. We extend the implications of our results beyond reading, to propose that gamma-band amplitude correlations might constitute a fundamental mechanism for large-scale neural integration during high-level cognition.

Associated Datasets

Nov 25, 2021·O. BertrandP. Ryvlin
Nov 14, 2019·B. ChatardP. Ryvlin
Aug 4, 2020·L. MinottiO. Bertrand

Citations

Jul 13, 2014·Brain and Language·Carlos M HamaméAgnés Trébuchon-Da Fonseca
Jan 19, 2016·Frontiers in Systems Neuroscience·André M Bastos, Jan-Mathijs Schoffelen
Aug 11, 2015·Frontiers in Psychology·Cihan M KadipasaogluNitin Tandon
Jun 25, 2013·Pain·Kanwaljeet J S AnandAndrew C Papanicolaou
Oct 11, 2016·International Journal of Neural Systems·Mani SaignavongsPhilippe Ryvlin
Apr 23, 2013·Journal of Neurosurgery·Emad Eskandar
Dec 1, 2017·PloS One·Cihan Mehmet KadipasaogluNitin Tandon
Jul 26, 2019·Journal of Neural Engineering·Paolo G GabrielV Gilja
Dec 28, 2018·Cerebral Cortex·Radhika MadhavanGabriel Kreiman
Jun 2, 2020·Frontiers in Neuroscience·Jean-Baptiste EichenlaubSydney S Cash
May 16, 2019·Language, Cognition and Neuroscience·Nicole A HimmelstossStefan Hawelka
Oct 25, 2020·Nature Communications·G ArnulfoJ M Palva
Aug 20, 2018·NeuroImage·Guangye LiGerwin Schalk

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