Abstract

We present the first simultaneous measurements of evoked potentials (EPs) and fMRI hemodynamic responses to visual stimulation. Visual evoked potentials (VEPs) were recorded both inside and outside the static 3T magnetic field, and during fMRI examination. We designed, constructed, and tested a non-magnetic 64-channel EEG recording cap. By using a large number of EEG channels it is possible to design a spatial filter capable of removing the artifact noise present when recording EEG/EPs within a strong magnetic field. We show that the designed spatial filter is capable of recovering the ballistocardiogram-contaminated original EEG signal. Isopotential plots of the electrode array recordings at the peak of the VEP response (approximately 100ms) correspond well with simultaneous fMRI observed activated areas of primary and secondary visual cortices.

Keywords

ElectroencephalographyArtifact (error)Spatial filterEEG-fMRIPhotic StimulationFilter (signal processing)Visual fieldNeuroscienceSIGNAL (programming language)Evoked potentialPsychologyVisual cortexElectrophysiologyVisual perceptionAudiologyArtificial intelligenceComputer scienceComputer visionPerceptionMedicine

MeSH Terms

ArtifactsBallistocardiographyBrainElectroencephalographyEvoked PotentialsVisualHumansMagnetic Resonance Imaging

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Publication Info

Year
1999
Type
article
Volume
10
Issue
9
Pages
1893-1897
Citations
139
Access
Closed

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Cite This

Giorgio Bonmassar, K. Anami, John R. Ives et al. (1999). Visual evoked potential (VEP) measured by simultaneous 64-channel EEG and 3T fMRI. Neuroreport , 10 (9) , 1893-1897. https://doi.org/10.1097/00001756-199906230-00018

Identifiers

DOI
10.1097/00001756-199906230-00018
PMID
10501528

Data Quality

Data completeness: 81%