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Large- and multi-scale networks in the rodent brain during novelty exploration [article]

Michael X Cohen, Arthur S. C. Franca, Bernhard Englitz
2020 bioRxiv   pre-print
We identified a constellation of multidimensional, inter-regional networks across a range of frequencies (2-200 Hz).  ...  Here we applied frequency-resolved multivariate source-separation analyses to characterize a large-scale dataset comprising spiking and local field potential activity recorded simultaneously in three brain  ...  across the frequency domain.  ... 
doi:10.1101/2020.12.08.416248 fatcat:h7ri7elkjrclhir4dl4lcwmppm

Altered cortical phase- and amplitude-coupling in Multiple Sclerosis [article]

Marcus Siems, Johannes Tünnerhoff, Ulf Ziemann, Markus Siegel
2021 bioRxiv   pre-print
AbstractMultiple Sclerosis is a demyelinating disease of the central nervous system that can result in cognitive decline and physical disability.  ...  frequency specific neuronal activity.  ...  Data availability statement The data is available from the authors upon reasonable request.  ... 
doi:10.1101/2021.02.17.431597 fatcat:7jz7prhakzcxxnfu3zpakmxyaa

Imaging of neural oscillations with embedded inferential and group prevalence statistics [article]

Peter W Donhauser, Esther Florin, Sylvain Baillet
2017 bioRxiv   pre-print
The detection of weak sources in the presence of stronger regional activity nearby is a typical complication of MEG/EEG source imaging.  ...  Along the way, we demonstrate several advantages of iES over standard source imaging approaches.  ...  function directly in the frequency domain, and 552 compute C (a,b) as the average of the real part of the cross-spectral density matrices in 553 the frequency band of interest 554 C a = f2 f =f1 Re(C  ... 
doi:10.1101/164731 fatcat:5pxvxxqaivbmtpcgj4d4zmuw6u

Neuronal Oscillatory Signatures of Joint Attention and Intersubjectivity in Arrhythmic Coaction

Alexander Maÿe, Tiezhi Wang, Andreas K. Engel
2021 Frontiers in Human Neuroscience  
However, we found several brain regions in which the frequency-specific activity significantly correlated with the objective task performance, the subjective experience thereof, and of the collaboration  ...  It is therefore interesting to figure out in how far coordinated brain activity may be induced by a rhythmicity in the task and/or the sensory feedback that the partners receive.  ...  ACKNOWLEDGMENTS The authors would like to express their gratitude to Mircea Stoica for supporting the development of the setup and data recording.  ... 
doi:10.3389/fnhum.2021.767208 pmid:34803642 pmcid:PMC8603840 fatcat:vronhz6kfndyreocsqxyprouda

Intrinsic 40Hz-phase asymmetries predict tACS effects during conscious auditory perception

Jan Meier, Guido Nolte, Till R. Schneider, Andreas K. Engel, Gregor Leicht, Christoph Mulert, Ilona Papousek
2019 PLoS ONE  
the inter-individual variability of phase asymmetries in future studies by tailored stimulation protocols.  ...  For this purpose, we applied multi-site HD-tACS at 40Hz bilaterally with a phase lag of 180° and recorded a 64-channel EEG to study the oscillatory phase dynamics at the source-space level during a dichotic  ...  Acknowledgments The authors would like to thank Lara Henkel for assistance with participant recruitment. Author Contributions  ... 
doi:10.1371/journal.pone.0213996 pmid:30943251 pmcid:PMC6447177 fatcat:hyfavmhiwfdojjfow3d4lozc6a

Imaging of neural oscillations with embedded inferential and group prevalence statistics

Peter W. Donhauser, Esther Florin, Sylvain Baillet, Daniele Marinazzo
2018 PLoS Computational Biology  
When one source is weaker than the other (Source strength 1 < 2), its presence in the resulting source map may be masked by that of the strongest source (the given significance level is γ 0 = .83, which  ...  Thin lines represent single-subject data. e) Subspace correlation maps, example subject: (top) Map of subcorr values in the 3-D source grid, indicating the location of brain regions generating stimulus-induced  ...  Alternatively, one can define the quality function directly in the frequency domain, and compute C (a,b) as the average of the real part of the estimated cross-spectral density matrices in the frequency  ... 
doi:10.1371/journal.pcbi.1005990 pmid:29408902 pmcid:PMC5815621 fatcat:pbs2k2tmdnfqvbp5m4lsl4i2va

Cross multivariate correlation coefficients as screening tool for analysis of concurrent EEG-fMRI recordings

Hong Ji, Nathan M. Petro, Badong Chen, Zejian Yuan, Jianji Wang, Nanning Zheng, Andreas Keil
2018 Journal of Neuroscience Research  
of EEG features; (3) it performs a screening of relevant EEG information by grouping the EEG channels into clusters to improve efficiency and to reduce computational load when searching for the best predictors  ...  This approach accomplishes three tasks: (1) It provides a measure for testing multivariate correlation and multivariate uncorrelation of the two modalities; (2) it provides criterion for the selection  ...  The ssVEP is an oscillatory EEG response, quantified in the frequency or time-frequency domain, at a specific known frequency.  ... 
doi:10.1002/jnr.24217 pmid:29406599 pmcid:PMC6001468 fatcat:yeznqgxdcba5rgzru424cjoioi

A Consolidated Perspective on Multimicrophone Speech Enhancement and Source Separation

Sharon Gannot, Emmanuel Vincent, Shmulik Markovich-Golan, Alexey Ozerov
2017 IEEE/ACM Transactions on Audio Speech and Language Processing  
We conclude this overview paper by providing a list of software and data resources and by discussing perspectives and future trends in the field.  ...  The enhancement and separation capabilities offered by these multichannel interfaces are usually greater than those of single-channel interfaces.  ...  One limitation of the ICA criterion is that it is invariant with respect to permutation of the sources. Yet, the order of the sources must be aligned across the frequency bins.  ... 
doi:10.1109/taslp.2016.2647702 fatcat:ltfmmoguxngk5jrvzy7azzufae

Augmenting interictal mapping with neurovascular coupling biomarkers by structured factorization of epileptic EEG and fMRI data [article]

Simon Van Eyndhoven, Patrick Dupont, Simon Tousseyn, Nico Vervliet, Wim Van Paesschen, Sabine Van Huffel, Borbála Hunyadi
2020 arXiv   pre-print
fMRI data (represented as a spatiotemporal BOLD signal matrix) are jointly decomposed into a superposition of several sources, characterized by space-time-frequency profiles.  ...  We show that the extracted source signatures provide a sensitive localization of the ictal onset zone, and, moreover, that complementary localizing information can be derived from the spatial variation  ...  As for patient 1, we found a source which is strongly correlated to the MWF envelope, and which had a mostly low-frequency behavior characteristic for spikes.  ... 
arXiv:2004.14185v1 fatcat:cqg4jzfhavhdhalxl2ugadaqim

Augmenting interictal mapping with neurovascular coupling biomarkers by structured factorization of epileptic EEG and fMRI data

Simon Van Eyndhoven, Patrick Dupont, Simon Tousseyn, Nico Vervliet, Wim Van Paesschen, Sabine Van Huffel, Borbála Hunyadi
2020 NeuroImage  
fMRI data (represented as a spatiotemporal BOLD signal matrix) are jointly decomposed into a superposition of several sources, characterized by space-time-frequency profiles.  ...  By analyzing interictal data from twelve patients, we show that the extracted source signatures provide a sensitive localization of the ictal onset zone (10/12).  ...  the MWF's broadband envelope, is preferably high; 4) the maximal pseudo t-statistic for the IED-related source's spatial signature is preferably high.  ... 
doi:10.1016/j.neuroimage.2020.117652 pmid:33359347 pmcid:PMC7903163 fatcat:w3za4sdl3vdcnnitdpcjm7oxny

Simple Acoustic Features Can Explain Phoneme-Based Predictions of Cortical Responses to Speech

Christoph Daube, Robin A.A. Ince, Joachim Gross
2019 Current Biology  
Traditionally, studies of such intermediate representations are guided by linguistically defined concepts, such as phonemes.  ...  We find that two recent results, the improved performance of an encoding model in which annotated linguistic and acoustic features were combined and the decoding of phoneme subgroups from phoneme-locked  ...  spaces as indicated by relatively high intra-class correlation coefficients across participants with outer folds and feature spaces as different measurements for the left ð0:96Þ and right ð0:88Þ hemispheres  ... 
doi:10.1016/j.cub.2019.04.067 pmid:31130454 pmcid:PMC6584359 fatcat:ub46l7mij5civae2ugot6hxhzi

Brain state expression and transitions are related to complex executive cognition in normative neurodevelopment

John D. Medaglia, Theodore D. Satterthwaite, Apoorva Kelkar, Rastko Ciric, Tyler M. Moore, Kosha Ruparel, Ruben C. Gur, Raquel E. Gur, Danielle S. Bassett
2018 NeuroImage  
Adolescence is marked by rapid development of executive function. Mounting evidence suggests that executive function in adults may be driven by dynamic control of neurophysiological processes.  ...  In a sample of 780 youth aged 8-22 yr (42.7% male) from the Philadelphia Neurodevelopment Cohort, we use a dynamic graph approach to extract activation states in BOLD fMRI data from 264 brain regions.  ...  The content is solely the responsibility of the authors and does not necessarily represent the official views of any of the funding agencies.  ... 
doi:10.1016/j.neuroimage.2017.10.048 pmid:29126965 pmcid:PMC5747984 fatcat:35lw7opdz5d3dbwm6pkui3a7qi

Spatiotemporal organization of human sensorimotor beta burst activity [article]

Catharina Zich, Andrew J Quinn, James J Bonaiuto, George O'Neill, Lydia C Mardell, Nick S Ward, Sven Bestmann
2022 bioRxiv   pre-print
Moreover, we find that the two propagation directions are characterised by distinct anatomical and physiological features.  ...  Finally, our results suggest that sensorimotor beta bursts occurring before and after a movement share the same generator but can be distinguished by their anatomical, spectral and spatiotemporal characteristics  ...  Acknowledgements C.Z. is supported by the Brain Research UK  ... 
doi:10.1101/2022.05.19.492617 fatcat:3veme77rnzc5leffwjjw5drabm

Mental operations in rhythm: Motor-to-sensory transformation mediates imagined singing

Yanzhu Li, Huan Luo, Xing Tian, Hugo Merchant
2020 PLoS Biology  
The coherent and frequency-specific activations in the motor-to-sensory transformation network mediate the internal construction of perceptual representations and form the foundation of neural computations  ...  We found that when participants imagined singing the same song in similar durations across trials, the delta frequency band (1-3 Hz, similar to the rhythm of the songs) showed more consistent phase coherence  ...  Acknowledgments We thank Jeff Walker for his technical support in MEG recording' Ling Liu, Gregory Cogan, Gaoxing Zheng, and Xiaoxuan Wang for their help on data analysis and source localization; and Yi  ... 
doi:10.1371/journal.pbio.3000504 pmid:33017389 fatcat:73ztd3yhkzgglkwab4tq2rblbu

Neurite architecture of the planum temporale predicts neurophysiological processing of auditory speech

Sebastian Ocklenburg, Patrick Friedrich, Christoph Fraenz, Caroline Schlüter, Christian Beste, Onur Güntürkün, Erhan Genç
2018 Science Advances  
We found that a higher density of dendrites and axons in the temporal speech area is associated with faster neurophysiological processing of auditory speech, as reflected by electroencephalography.  ...  On the basis of postmortem data, it has been suggested that asymmetries in the organization of the intrinsic microcircuitry of the posterior temporal lobe may produce this leftward timing advantage.  ...  Koch for help with the fiber tracking of the AF. We also thank L. Schlaffke, M. Froeling, and B. Mädler (Philips Germany) for scientific support with the MRI measurements, as well as T.  ... 
doi:10.1126/sciadv.aar6830 pmid:30009258 pmcid:PMC6040861 fatcat:zbzeeeaburh63c54qes2tz4lwe
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