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Instantaneous and lagged measurements of linear and nonlinear dependence between groups of multivariate time series: frequency decomposition
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TLDR
Pascual-Marqui et al. as mentioned in this paper defined linear dependence (coherence) and nonlinear dependence (phase synchronization) between any number of multivariate time series, expressed as the sum of lagged dependence and instantaneous dependence.Abstract:
Measures of linear dependence (coherence) and nonlinear dependence (phase synchronization) between any number of multivariate time series are defined The measures are expressed as the sum of lagged dependence and instantaneous dependence The measures are non-negative, and take the value zero only when there is independence of the pertinent type These measures are defined in the frequency domain and are applicable to stationary and non-stationary time series These new results extend and refine significantly those presented in a previous technical report (Pascual-Marqui 2007, arXiv:07061776 [statME], this http URL), and have been largely motivated by the seminal paper on linear feedback by Geweke (1982 JASA 77:304-313) One important field of application is neurophysiology, where the time series consist of electric neuronal activity at several brain locations Coherence and phase synchronization are interpreted as "connectivity" between locations However, any measure of dependence is highly contaminated with an instantaneous, non-physiological contribution due to volume conduction and low spatial resolution The new techniques remove this confounding factor considerably Moreover, the measures of dependence can be applied to any number of brain areas jointly, ie distributed cortical networks, whose activity can be estimated with eLORETA (Pascual-Marqui 2007, arXiv:07103341 [math-ph])read more
Citations
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Journal ArticleDOI
Assessing interactions in the brain with exact low-resolution electromagnetic tomography
Roberto D. Pascual-Marqui,Dietrich Lehmann,M. Koukkou,Kieko Kochi,Peter Anderer,Bernd Saletu,Hideaki Tanaka,Koichi Hirata,E. Roy John,E. Roy John,Leslie S. Prichep,Leslie S. Prichep,Rolando J. Biscay-Lirio,Toshihiko Kinoshita +13 more
TL;DR: A solution to this inverse problem that attains exact localization: exact low-resolution brain electromagnetic tomography (eLORETA) is reported, which yields high time-resolution intracranial signals that can be used for assessing functional dynamic connectivity in the brain.
Journal ArticleDOI
Intraneural stimulation elicits discrimination of textural features by artificial fingertip in intact and amputee humans
Calogero Maria Oddo,Stanisa Raspopovic,Stanisa Raspopovic,Fiorenzo Artoni,Fiorenzo Artoni,Alberto Mazzoni,Giacomo Spigler,Francesco Maria Petrini,Federica Giambattistelli,Fabrizio Vecchio,Francesca Miraglia,Loredana Zollo,Giovanni Di Pino,Domenico Camboni,Maria Chiara Carrozza,Eugenio Guglielmelli,Paolo Maria Rossini,Ugo Faraguna,Silvestro Micera,Silvestro Micera +19 more
TL;DR: It is shown that texture discrimination can be artificially provided in human subjects by implementing a neuromorphic real-time mechano-neuro-transduction (MNT) process, which emulates to some extent the firing dynamics of SA1 cutaneous afferents.
Journal ArticleDOI
Functional brain network efficiency predicts intelligence
Nicolas Langer,Andreas Pedroni,Andreas Pedroni,Lorena R. R. Gianotti,Jürgen Hänggi,Daria Knoch,Lutz Jäncke +6 more
TL;DR: This is the first study that substantiates the neural efficiency hypothesis as well as the Parieto‐Frontal Integration Theory (P‐FIT) of intelligence in the context of functional brain network characteristics and their relation to psychometric intelligence.
Journal ArticleDOI
Electroconvulsive Therapy Modulates Resting-State EEG Oscillatory Pattern and Phase Synchronization in Nodes of the Default Mode Network in Patients With Depressive Disorder.
TL;DR: ECT modulated resting-state EEG oscillatory patterns and phase synchronization in central nodes of the default mode network (DMN) and changes in beta synchronization in the left hemisphere might explain the ECT-related cognitive side effects.
Journal ArticleDOI
Resting-state EEG source localization and functional connectivity in schizophrenia-like psychosis of epilepsy.
Leonides Canuet,Ryouhei Ishii,Roberto D. Pascual-Marqui,Masao Iwase,Ryu Kurimoto,Yasunori Aoki,Shunichiro Ikeda,Hidetoshi Takahashi,Takayuki Nakahachi,Masatoshi Takeda +9 more
TL;DR: Patients with psychosis had increased beta temporo-prefrontal connectivity in the hemisphere with predominant seizure focus and increased theta oscillations in regions involved in the default mode network (DMN), namely the medial and lateral parietal cortex bilaterally in the psychotic patients relative to their nonpsychotic counterparts.
References
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Book ChapterDOI
Relations Between Two Sets of Variates
TL;DR: The concept of correlation and regression may be applied not only to ordinary one-dimensional variates but also to variates of two or more dimensions as discussed by the authors, where the correlation of the horizontal components is ordinarily discussed, whereas the complex consisting of horizontal and vertical deviations may be even more interesting.
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Nonparametric permutation tests for functional neuroimaging: A primer with examples
TL;DR: The standard nonparametric randomization and permutation testing ideas are developed at an accessible level, using practical examples from functional neuroimaging, and the extensions for multiple comparisons described.
Book
Randomization, Bootstrap and Monte Carlo Methods in Biology
TL;DR: The idea of a randomization test has been explored in the context of data analysis for a long time as mentioned in this paper, and it has been applied in a variety of applications in biology, such as single species ecology and community ecology.
Book
Time Series: Data Analysis and Theory
TL;DR: This book will be most useful to applied mathematicians, communication engineers, signal processors, statisticians, and time series researchers, both applied and theoretical.
Journal Article
Standardized low-resolution brain electromagnetic tomography (sLORETA): technical details.
TL;DR: The technical details of the method are presented, allowing researchers to test, check, reproduce and validate the new method, and a solution reported here yields images of standardized current density with zero localization error.
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