Probabilistic mapping of language networks from high frequency activity induced by direct electrical stimulation.

Human Brain Mapping
Marcela Perrone-BertolottiOlivier David

Abstract

Direct electrical stimulation (DES) at 50 Hz is used as a gold standard to map cognitive functions but little is known about its ability to map large-scale networks and specific subnetwork. In the present study, we aim to propose a new methodological approach to evaluate the specific hypothesis suggesting that language errors/dysfunction induced by DES are the result of large-scale network modification rather than of a single cortical region, which explains that similar language symptoms may be observed after stimulation of different cortical regions belonging to this network. We retrospectively examined 29 patients suffering from focal drug-resistant epilepsy who benefitted from stereo-electroencephalographic (SEEG) exploration and exhibited language symptoms during a naming task following 50 Hz DES. We assessed the large-scale language network correlated with behavioral DES-induced responses (naming errors) by quantifying DES-induced changes in high frequency activity (HFA, 70-150 Hz) outside the stimulated cortical region. We developed a probabilistic approach to report the spatial pattern of HFA modulations during DES-induced language errors. Similarly, we mapped the pattern of after-discharges (3-35 Hz) occurring after DES...Continue Reading

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Citations

Dec 29, 2020·Frontiers in Human Neuroscience·Krista M GrandeRavindra Arya
Mar 30, 2021·Frontiers in Human Neuroscience·Olivier AronLouis Maillard
Apr 19, 2021·The European Journal of Neuroscience·Jacques Jonas, Bruno Rossion
Jul 12, 2021·Epilepsia·Aileen McGonigalPatrick Chauvel
Nov 11, 2021·Acta neurochirurgica·George Samandouras

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Software Mentioned

Statistical Parametric Mapping
SEEG HFA

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