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Frequency Domain Simultaneous Source and Source Coherence Estimation With an Application to MEG
2004
IEEE Transactions on Biomedical Engineering
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Frequency domain simultaneous source and source coherence estimation with an application to MEG. IEEE Transactions on Biomedical Engineering, 51(1), 45-55. ...
We present a method for simultaneous estimation of source location and orientation parameters and cross-spectral parameters to overcome these problems. ...
ACKNOWLEDGMENT The authors would like to thank C. V. Dolan for his helpful comments. They would also like to thank the anonymous reviewers for their effort and valuable comments. ...
doi:10.1109/tbme.2003.820385
pmid:14723493
fatcat:wht75bkntjf5ngxfeznqgb4s4q
Electrophysiological Brain Connectivity: Theory and Implementation
2019
IEEE Transactions on Biomedical Engineering
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Various connectivity estimators are discussed, and algorithms introduced. Important issues for estimating and mapping brain functional connectivity with electrophysiology are discussed. ...
This tutorial is aimed at providing an introduction to brain functional connectivity from electrophysiological signals, including electroencephalography (EEG), magnetoencephalography (MEG), electrocorticography ...
Efforts were also made to estimate sources and connectivity simultaneously from EEG/MEG. ...
doi:10.1109/tbme.2019.2913928
pmid:31071012
pmcid:PMC6834897
fatcat:qqxxwzgbkbh37je7ztfjjkpima
Optimized beamforming for simultaneous MEG and intracranial local field potential recordings in deep brain stimulation patients
2010
NeuroImage
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We demonstrate how beamforming makes it possible to localize cortical regions whose activity is coherent with the STN-LFP, extract artefact-free virtual electrode time-series from regions of interest and ...
We recorded, simultaneously, magnetoencephalographic (MEG) signals and subcortical local field potentials (LFP) in a Parkinson's disease (PD) patient with bilateral deep brain stimulation (DBS) electrodes ...
Acknowledgments We would like to thank David Bradbury, Janice Glensman, Zoe Chen and James Kilner for their assistance with conducting the experiments and Jan-Mathijs Schoffelen and Stefan Debener for ...
doi:10.1016/j.neuroimage.2009.12.115
pmid:20056156
pmcid:PMC3221048
fatcat:zxtaztyvvjfhhnqwyb6j3nkrq4
Beamformer Source Analysis and Connectivity on Concurrent EEG and MEG Data during Voluntary Movements
2014
PLoS ONE
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The signal-to-noise ratio (SNR) level of the coherent rhythmic activity at the tapping frequency in MEG and combined MEG+EEG data was significantly higher than EEG alone. ...
subjects using a beamformer approach called the dynamic imaging of coherent sources (DICS) with subsequent source signal reconstruction and renormalized partial directed coherence analysis (RPDC). ...
MEG and EEG were recorded simultaneously using an Elekta Neuromag system. ...
doi:10.1371/journal.pone.0091441
pmid:24618596
pmcid:PMC3949988
fatcat:ddbaru4cifelzbdtzsamcdam5e
Electrophysiological Source Imaging: A Noninvasive Window to Brain Dynamics
2018
Annual Review of Biomedical Engineering
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Electrophysiological source imaging estimates the underlying brain electrical sources from EEG and MEG measurements. ...
Integration of electrophysiological source imaging and functional magnetic resonance imaging could further enhance spatiotemporal resolution and specificity to an extent that is not attainable with either ...
ACKNOWLEDGEMENTS This work was supported in part by NIH EB021027, NS096761, MH114233, AT009263, EY023101, MH104402, EB008389, HL117664, NSF CBET-1450956, and NSF DGE-1069104. ...
doi:10.1146/annurev-bioeng-062117-120853
pmid:29494213
pmcid:PMC7941524
fatcat:xypqgl7snbbnnidrn5ddepj6tu
A review of EEG and MEG for brainnetome research
2013
Cognitive Neurodynamics
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Because of EEG/MEG's applicability to brainnetome analyses, the aim of this review is to identify the procedures that can be used to form a network using EEG/MEG data in sensor or source space and to promote ...
Some potential applications of the EEG/MEG brainnetome are to use newly developed methods to associate the properties of a brainnetome with indices of cognition or disease conditions. ...
Acknowledgments We appreciate discussions with Rhoda E. and ...
doi:10.1007/s11571-013-9274-9
pmid:24624229
pmcid:PMC3945460
fatcat:6jjnffm5zfhtbgovklf45eogja
Optimal spatial filtering for brain oscillatory activity using the Relevance Vector Machine
2013
Cognitive Processing
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The performance of our frequency-domain RVM method (fdRVM) was compared with that of dynamic imaging of coherent sources (DICS), a frequency-domain spatial filter that employs a minimum variance adaptive ...
The methods were tested both on simulated and real data. Two types of simulated MEG data sets were generated, one with continuous source activity and the other with transiently active sources. ...
We simulated two 10-min data sets, one with 'steadystate' (with respect to the time-analysis window) sources S1 S2 S3 S3 S2 S1 and another with 'transient' sources, for the following reasons: (a) Frequency-domain ...
doi:10.1007/s10339-013-0568-y
pmid:23729235
fatcat:p4arkduc2zbwheb3ohwf6xq6nu
Coherent neural representation of hand speed in humans revealed by MEG imaging
2007
Proceedings of the National Academy of Sciences of the United States of America
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We used coherence and phase synchronization to investigate the coupling between the estimated activity throughout the brain and the simultaneously recorded instantaneous hand speed. ...
Here, we applied magnetoencephalography (MEG) source imaging to the ongoing brain activity in subjects performing a continuous visuomotor (VM) task. ...
Chavez, and J. Martinerie for helpful discussions and S. Dehaene for comments on an earlier version of the manuscript. ...
doi:10.1073/pnas.0609632104
pmid:17442753
pmcid:PMC1863498
fatcat:jui7rg5nvrgcfglk7rbg5jtvqm
EEG-MEG Integration Enhances the Characterization of Functional and Effective Connectivity in the Resting State Network
2015
PLoS ONE
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Here, EEG (64-channel system) and MEG (275 sensor system) were recorded simultaneously in conditions with eyes open (EO) and eyes closed (EC) in 29 healthy adults. ...
It remains an open question as to whether the integration of EEG and MEG data would improve the information obtained from the above mentioned parameters. ...
Dynamic imaging of coherent sources (DICS) is one of the source analysis techniques in the frequency domain. ...
doi:10.1371/journal.pone.0140832
pmid:26509448
pmcid:PMC4624977
fatcat:zziebm4nwrca5nx5quqh7kezl4
Analysis of Functional Connectivity and Oscillatory Power Using DICS: From Raw MEG Data to Group-Level Statistics in Python
2018
Frontiers in Neuroscience
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DICS is a beamforming technique in the frequency-domain that enables the study of the cortical sources of oscillatory activity and synchronization between brain regions. ...
In this paper, we describe a full data analysis pipeline for functional connectivity analysis based on dynamic imaging of coherent sources (DICS) of MEG data. ...
ACKNOWLEDGMENTS We would like to thank Britta Westner, Sarang S. Dalal, Eric Larson, and Alexandre Gramfort for their help with reviewing the code. ...
doi:10.3389/fnins.2018.00586
pmid:30271317
pmcid:PMC6146299
fatcat:ngxsrfpggbff5ewkjyaiwoz4r4
Measuring the cortical tracking of speech with optically-pumped magnetometers
2021
NeuroImage
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The radial component of the magnetic field was recorded simultaneously with 45-46 OPMs evenly covering the scalp surface and fixed to an additively manufactured helmet which fitted all 4 participants. ...
We estimated CTS with reconstruction accuracy and coherence, and determined the number of dominant principal components (PCs) to remove from the data (as a preprocessing step) for optimal estimation. ...
Acknowledgements The SQUID-based and OPM-based MEG projects at the CUB Hôpital Erasme are financially supported by the Fonds Erasme (Brussels, Belgium). ...
doi:10.1016/j.neuroimage.2021.117969
pmid:33744453
fatcat:kpd6vx5tvjdrzewdygdj7ezzi4
A Comprehensive Review of Magnetoencephalography (MEG) Studies for Brain Functionality in Healthy Aging and Alzheimer's Disease (AD)
2018
Frontiers in Computational Neuroscience
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Neural oscillations were established with their association with neurophysiological activities and the altered rhythmic patterns are believed to be linked directly to the progression of cognitive decline ...
It is also important to note that MEG data can also be utilized for the same pursuit in combination with other imaging modalities. ...
ACKNOWLEDGMENTS PKM (Principal Investigator) thanks for financial support from TATA innovation fellowship from Ministry of Science and Technology, Government of India. Sincere thanks to Prof. ...
doi:10.3389/fncom.2018.00060
pmid:30190674
pmcid:PMC6115612
fatcat:u2jaxvd6xrf6jfesn4hy7eumdy
Stochastic maximum likelihood mean and cross-spectrum structure modelling in neuro-magnetic source estimation
2005
Digital signal processing (Print)
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., Frequency domain simultaneous source and source coherence estimation with an application to MEG, IEEE Trans. Biomed. ...
Eng. 51 (1) (2004) 45-55] we proposed to analyze cross-spectrum matrices obtained from electro-or magnetoencephalographic (EEG/MEG) signals, to obtain estimates of the EEG/MEG sources and their coherence ...
is known to deteriorate with coherent sources. ...
doi:10.1016/j.dsp.2004.09.003
fatcat:7mrydao43be6hhep57h5yuwbka
Multimodal alterations of directed connectivity profiles in patients with attention-deficit/hyperactivity disorders
2019
Scientific Reports
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The dynamic characterization of coherent sources and temporal partial directed coherence, as measures of functional and effective connectivity, were applied to multimodal resting EEG and MEG data obtained ...
We achieved an accuracy of 98% by combining features from all five studied frequency bands. ...
All authors have approved the submitted version and agreed both to be personally accountable for the author's own contributions and to ensure that questions related to the accuracy or integrity of any ...
doi:10.1038/s41598-019-56398-8
pmid:31882672
pmcid:PMC6934806
fatcat:bke3bh5pj5glbf7wx44lcz4dqa
Event-Related Coherence in Visual Cortex and Brain Noise: An MEG Study
2021
Applied Sciences
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Before coherence and brain noise calculations, MEG data were first transformed from recorded channel data to brain source waveforms by solving the inverse problem. ...
We found that stronger brain entrainment to the visual stimuli concurred with higher brain noise in both studies. ...
Acknowledgments: The authors graciously acknowledge the subjects for their contribution to this research.
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/app11010375
fatcat:axcofvnwkjfoffhkq3qnb3uha4
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