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Measurement of the Mapping between Intracranial EEG and fMRI Recordings in the Human Brain

Carmichael, David W; Vulliemoz, Serge; Murta, Teresa; Chaudhary, Umair; Perani, Suejen; Rodionov, Roman; Rosa, Maria Joao; ... Lemieux, Louis; + view all (2024) Measurement of the Mapping between Intracranial EEG and fMRI Recordings in the Human Brain. Bioengineering , 11 (3) , Article 224. 10.3390/bioengineering11030224. Green open access

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Abstract

There are considerable gaps in our understanding of the relationship between human brain activity measured at different temporal and spatial scales. Here, electrocorticography (ECoG) measures were used to predict functional MRI changes in the sensorimotor cortex in two brain states: at rest and during motor performance. The specificity of this relationship to spatial co-localisation of the two signals was also investigated. We acquired simultaneous ECoG-fMRI in the sensorimotor cortex of three patients with epilepsy. During motor activity, high gamma power was the only frequency band where the electrophysiological response was co-localised with fMRI measures across all subjects. The best model of fMRI changes across states was its principal components, a parsimonious description of the entire ECoG spectrogram. This model performed much better than any others that were based either on the classical frequency bands or on summary measures of cross-spectral changes. The region-specific fMRI signal is reflected in spatially and spectrally distributed EEG activity.

Type: Article
Title: Measurement of the Mapping between Intracranial EEG and fMRI Recordings in the Human Brain
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/bioengineering11030224
Publisher version: http://dx.doi.org/10.3390/bioengineering11030224
Language: English
Additional information: © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Keywords: functional MRI; Intracranial EEG; BOLD; BOLD coupling; fMRI biophysics; EEG-fMRI
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Experimental Epilepsy
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Imaging Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/10188415
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