Wavelet analysis as a tool for investigating movement-related cortical oscillations in EEG-fMRI coregistration

Brain Topography
Silvia Francesca StortiP Manganotti

Abstract

Electroencephalography combined with functional magnetic resonance imaging (EEG-fMRI) identifies blood oxygenation level dependent (BOLD) signal changes associated with physiological and pathological EEG events. In this study we used EEG-fMRI to determine the possible correlation between topographical movement related EEG changes in brain oscillatory activity recorded from EEG electrodes over the scalp and fMRI cortical responses in motor areas during finger movement. Thirty-two channels of EEG were recorded in 12 subjects during eyes-closed condition inside a three T magnetic resonance (MR) scanner using an MR-compatible EEG recording system. Off-line MRI artifact subtraction software was applied to obtain continuous EEG data during fMRI acquisition. For EEG data analysis we used a time-frequency approach to measure time by varying the energy in a signal at a given frequency band by the convolution of the EEG signal with a wavelet family in the alpha and beta bands. The correlation between the BOLD signal associated with the EEG regressor provides that sensory motor region is a source of the EEG. We conclude that combined EEG-fMRI can be used to investigate movement-related oscillations of the human brain inside an MRI scanner...Continue Reading

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Citations

May 18, 2012·Magma·Silvia F StortiPaolo Manganotti
Jul 12, 2011·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·P ManganottiA Fiaschi
Sep 21, 2010·Magnetic Resonance Imaging·Emanuela FormaggioPaolo Manganotti
Sep 29, 2011·British Journal of Clinical Pharmacology·Carina GraversenAsbjørn M Drewes
Sep 25, 2014·Basic & Clinical Pharmacology & Toxicology·Carina GraversenAsbjørn M Drewes
Nov 27, 2010·NeuroImage·Emanuela FormaggioGianna Maria Toffolo
May 20, 2014·Brain Topography·Emanuela FormaggioPaolo Manganotti
Sep 21, 2013·Clinical EEG and Neuroscience·Emanuela FormaggioPaolo Manganotti
Nov 4, 2016·Clinical EEG and Neuroscience·Silvia Francesca StortiGloria Menegaz
Apr 18, 2020·Aging Clinical and Experimental Research·Antonio GangemiRosa Angela Fabio

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