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Single-trial EEG–fMRI reveals the dynamics of cognitive function
2006
Trends in Cognitive Sciences
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We emphasize the potential of simultaneous EEG and fMRI recordings to pursue new strategies in cognitive neuroimaging. ...
Recent hardware and software developments have made it feasible to acquire EEG and fMRI data simultaneously. ...
EEG-informed fMRI analysis. EEG (blue arrows) and fMRI (pink arrow) can be recorded simultaneously (a) and, subsequently, EEG signals are corrected for fMRI artifacts. ...
doi:10.1016/j.tics.2006.09.010
pmid:17074530
fatcat:g4v2ebmo5nczvnclcta5tyjkbu
EEG-fMRI: Ballistocardiogram Artifact Reduction by Surrogate Method for Improved Source Localization
2022
Frontiers in Neuroscience
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For the analysis of simultaneous EEG-fMRI recordings, it is vital to use effective artifact removal tools. ...
This applies in particular to the ballistocardiogram (BCG) artifact which is difficult to remove without distorting signals of interest related to brain activity. ...
artifact correction in simultaneous EEG-fMRI data processing. ...
doi:10.3389/fnins.2022.842420
pmid:35360180
pmcid:PMC8960642
fatcat:fuma5vii7vgebixsdvcoy2jgle
Artifact Reduction in Simultaneous EEG-fMRI: A Systematic Review of Methods and Contemporary Usage
2021
Frontiers in Neurology
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This paper presents a systematic review of methods for artifact reduction in simultaneous EEG-fMRI from literature published since 1998, and an additional systematic review of EEG-fMRI studies published ...
The aim of the first review is to distill the literature into clear guidelines for use of simultaneous EEG-fMRI artifact reduction methods, and the aim of the second review is to determine the prevalence ...
It was argued that CCA would be superior to ICA or PCA, as it is able to take into account temporal (periodicity) and spatial (topography) aspects of the BCG due to taking consecutive BCG instances into ...
doi:10.3389/fneur.2021.622719
pmid:33776886
pmcid:PMC7991907
fatcat:mwrddhfc2ndvjl6tho32fxxkf4
Clustering-Constrained ICA for Ballistocardiogram Artifacts Removal in Simultaneous EEG-fMRI
2018
Frontiers in Neuroscience
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In conclusion, our novel method successfully and effectively removed BCG artifacts in both simulated and vivo EEG data tests, showing the potentials of removing artifacts in EEG-fMRI applications. ...
However, EEG is easily influenced by ballistocardiogram (BCG) artifacts and may cause false identification of the related EEG features, such as epileptic spikes. ...
It is worthwhile to note that during the removal of artifacts, the physiological signal preservation should be taken into account (Abreu et al., 2016) . ...
doi:10.3389/fnins.2018.00059
pmid:29487499
pmcid:PMC5816921
fatcat:qcv2dwu4obdwjmde2y7fzvipne
EEG-Informed fMRI: A Review of Data Analysis Methods
2018
Frontiers in Human Neuroscience
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Fernando Lopes da Silva for his feedback and help in structuring this paper. ...
By taking into account not only the extent of artifact removal, but also the associated degradation of the EEG signal of interest, both studies arrived at the conclusion that the performance of each method ...
EEG-Specific Artifacts Although not caused by the MR environment, other sources of artifacts that contaminate the EEG must also be accounted for in simultaneous EEG-fMRI studies, namely: eye movements, ...
doi:10.3389/fnhum.2018.00029
pmid:29467634
pmcid:PMC5808233
fatcat:vocpso63pjeg3ktkqwrsvf6ixe
Fusing EEG and fMRI based on a bottom-up model: inferring activation and effective connectivity in neural masses
2005
Philosophical Transactions of the Royal Society of London. Biological Sciences
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A methodology for the estimation of parameters from fused EEG/fMRI data is also presented. In this context, the concepts of activation and effective connectivity are carefully revised. ...
The most significant contributions in this field, known as cognitive neuroscience, have been achieved to date by using innovative neuroimaging techniques (such as EEG and fMRI), which measure variations ...
The EEG after artifact correction is shown in the bottom panel.
Figure 4 .α 4 The bottom-up biophysical model for the fusion of EEG and fMRI. ...
doi:10.1098/rstb.2005.1646
pmid:16087446
pmcid:PMC1854929
fatcat:qdktmgdx4rhl7hvmub57p6vwpm
Reference layer adaptive filtering (RLAF) for EEG artifact reduction in simultaneous EEG-fMRI
2017
Journal of Neural Engineering
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EEG-fMRI study R Marecek, M Lamos, M Mikl et al. Ballistocardiogram artifact removal from EEG signals using adaptive filtering of EOG signals Myung H In, Soo Y Lee, Tae S Park et al. ...
reference layer and adaptive filtering Several evaluation criteria suggest superior effectivity in terms of artifact reduction We demonstrate that physiological EEG components are preserved Journal of ...
Adaptive filters commonly take into account current and past samples of a signal. ...
doi:10.1088/1741-2552/14/2/026003
pmid:28155841
fatcat:tvr7tnog4vasxfj72ajto2yo6q
Investigating the variability of cardiac pulse artifacts across heartbeats in simultaneous EEG-fMRI recordings: A 7T study
2019
NeuroImage
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Altogether, these results offer novel insights into the dynamics and underlying mechanisms of the pulse artifact, with important consequences for its correction, relevant to most EEG-fMRI applications. ...
Simultaneous EEG-fMRI was performed at 7T on healthy participants at rest or under visual stimulation, with concurrent recordings of breathing and cardiac activity. ...
Discussion This study investigated the variability of EEG pulse artifacts across heartbeats, in simultaneous EEG-fMRI. ...
doi:10.1016/j.neuroimage.2019.02.021
pmid:30742980
fatcat:saszhjp3njhqlbmjv72cnpaxqi
Development, validation, and comparison of ICA-based gradient artifact reduction algorithms for simultaneous EEG-spiral in/out and echo-planar fMRI recordings
2009
NeuroImage
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Artifact reduction for simultaneous EEG/fMRI recording: adaptive FIR reduction of imaging artifacts. Clin. Neurophysiol. 117, 681-692.) and a conventional temporal ICA algorithm. ...
EEG data acquired in an MRI scanner are heavily contaminated by gradient artifacts that can significantly compromise signal quality. ...
To assess a method's ability in preserving the signal content, the spectral content of artifact-free segments before and after artifact correction was compared. ...
doi:10.1016/j.neuroimage.2009.06.072
pmid:19580873
pmcid:PMC2745974
fatcat:uznymwmji5axtcsaq5u5t6u3jq
EEG-fMRI Signal Coupling Is Modulated in Subjects With Mild Cognitive Impairment and Amyloid Deposition
2021
Frontiers in Aging Neuroscience
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This finding was paralleled by stronger absolute fMRI signal in the parahippocampus and weaker absolute fMRI signal in the inferior frontal gyrus in amyloid-positive subjects. ...
Thalamo-cortical alpha-fMRI signal coupling was only observed in HCS. ...
We thank Mac Lanphier for his help (scripting) in the EEG-fMRI signal correlation analysis. ...
doi:10.3389/fnagi.2021.631172
pmid:33967737
pmcid:PMC8104007
fatcat:uxvoravzp5bppph2xwglcyaceu
Effects of fluctuating physiological rhythms during prolonged EEG-fMRI studies
2008
Clinical Neurophysiology
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Significance: Physiological EEG rhythms may be integrated to the analysis of EEG-fMRI in studies with fluctuation of alertness, to eliminate possible confounding factors. ...
Rhythm regressors added as confounds in the fMRI analysis explained at least 5% of BOLD signal variance in 6.8 ± 8.9% of gray matter voxels, a contribution which is of the order of typical changes in fMRI ...
The physiological rhythms were largely preserved after the entire preprocessing. Final EEG obtained after gradient artifact and BKG artifact removal. ...
doi:10.1016/j.clinph.2008.07.284
pmid:18977169
pmcid:PMC3792084
fatcat:vrtrfeioujaihc3mog7gk7rf3e
Independent component analysis as a model-free approach for the detection of BOLD changes related to epileptic spikes: A simulation study
2009
Human Brain Mapping
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EEG-fMRI in epileptic patients is commonly analyzed using the general linear model (GLM), which assumes a known hemodynamic response function (HRF) to epileptic spikes in the EEG. ...
These false activations were often related to large artifacts that coincidentally occurred simultaneously with some of the random simulated spikes. ...
Nevertheless, it would be interesting to develop a method that would take into account possible nonlinear effects. ...
doi:10.1002/hbm.20647
pmid:18726909
pmcid:PMC3792083
fatcat:vmnoa436djgdjnzwdp32qnk5t4
Multimodal Functional Network Connectivity: An EEG-fMRI Fusion in Network Space
2011
PLoS ONE
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In this paper, multimodal functional network connectivity (mFNC) is proposed for the fusion of EEG and fMRI in network space. ...
Finally, fMRI FNs are matched to EEG FNs in the spatial domain using networkbased source imaging (NESOI). ...
Ballistocardiogram artifact correction was performed using the Optimal Basis Set method [34] . The data were low-pass filtered at 25 Hz and downsampled to 50 Hz, then concatenated. ...
doi:10.1371/journal.pone.0024642
pmid:21961040
pmcid:PMC3178514
fatcat:4t3i6k6mvvdnlojyxdr5dukhka
The "why" and "how" of JointICA: Results from a visual detection task
2012
NeuroImage
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We show the performance of the algorithm on data obtained in a visual detection task, and compare the performance for EEG recorded simultaneously with fMRI data and for EEG recorded in a separate session ...
One such multimodal approach is the combination of electroencephalography (EEG) and functional magnetic resonance imaging (fMRI). ...
The number of components Taking this precaution into account, we believe that the results reported here constitute a good argument for acquiring EEG and fMRI data in separate sessions, as it may yield ...
doi:10.1016/j.neuroimage.2012.01.063
pmid:22270355
fatcat:nqg3e7ct5ffnte6imcape3cqcq
Human VMPFC encodes early signatures of confidence in perceptual decisions
2018
eLife
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Here, we recorded simultaneous EEG-fMRI while participants performed a direction discrimination task and rated their confidence on each trial. ...
Importantly, trial-to-trial variability in this electrophysiologically-derived confidence signal was uniquely associated with fMRI responses in the ventromedial prefrontal cortex (VMPFC), a region not ...
EEG signals recorded inside an MR scanner are contaminated with gradient artifacts and ballistocardiogram (BCG) artifacts due to magnetic induction on the EEG leads. ...
doi:10.7554/elife.38293
pmid:30247123
pmcid:PMC6199131
fatcat:do6we5fzzzclpogrlcmwkkb2pe
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