Journal ArticleDOI
Dynamical assessment of physiological systems and states using recurrence plot strategies
Reads0
Chats0
TLDR
This paper illustrates how recurrence plots can take single physiological measurements, project them into multidimensional space by embedding procedures, and identify time correlations (recurrences) that are not apparent in the one-dimensional time series.Abstract:
Physiological systems are best characterized as complex dynamical processes that are continuously subjected to and updated by nonlinear feedforward and feedback inputs. System outputs usually exhibit wide varieties of behaviors due to dynamical interactions between system components, external noise perturbations, and physiological state changes. Complicated interactions occur at a variety of hierarchial levels and involve a number of interacting variables, many of which are unavailable for experimental measurement. In this paper we illustrate how recurrence plots can take single physiological measurements, project them into multidimensional space by embedding procedures, and identify time correlations (recurrences) that are not apparent in the one-dimensional time series. We extend the original description of recurrence plots by computing an array of specific recurrence variables that quantify the deterministic structure and complexity of the plot. We then demonstrate how physiological states can be assessed by making repeated recurrence plot calculations within a window sliding down any physiological dynamic. Unlike other predominant time series techniques, recurrence plot analyses are not limited by data stationarity and size constraints. Pertinent physiological examples from respiratory and skeletal motor systems illustrate the utility of recurrence plots in the diagnosis of nonlinear systems. The methodology is fully applicable to any rhythmical system, whether it be mechanical, electrical, neural, hormonal, chemical, or even spacial.read more
Citations
More filters
Journal ArticleDOI
Exploration of Teammate Trust and Interaction Dynamics in Human-Autonomy Teaming
Mustafa Demir,Nathan J. McNeese,Jaime C. Gorman,Nancy J. Cooke,Christopher W. Myers,David Grimm +5 more
TL;DR: In this paper, the authors examine the dynamic nature of teammate trust through real-time measures of team interactions and find that team interaction would be related to the development of trust and recovery from the failures.
Journal ArticleDOI
Changes of dimension of EEG/ECoG nonlinear dynamics predict epileptogenesis and therapy outcomes
Massimo Rizzi,Claudia Brandt,Itai Weissberg,Dan Z. Milikovsky,Alberto Pauletti,Gaetano Terrone,Alessia Salamone,Federica Frigerio,Wolfgang Löscher,Alon Friedman,Annamaria Vezzani +10 more
TL;DR: A common and significant decrease of nonlinear dynamics dimension in EEG/ECoG tracings during early epileptogenesis predicts the severity of ensuing epilepsy, and this measure is modulated by disease-modifying or antiepileptogenic treatments.
Journal ArticleDOI
Detecting protein atom correlations using correlation of probability of recurrence.
Hiba Fataftah,Wael I. Karain +1 more
TL;DR: CPR is introduced as a complementary method to detect correlations between protein residue atoms and is able to detect a small number of significant correlations between distant residues that are not detected by DCCM.
Journal ArticleDOI
Detection of cardiac variability in the isolated rat heart
TL;DR: Recurrence quantification analysis (RQA) suggests that when either the sympathetic or parasympathetic division of the autonomic nervous system overwhelms the other, the dynamics underlying cardiac variability become stationary.
Journal ArticleDOI
Ability of a Set of Trunk Inertial Indexes of Gait to Identify Gait Instability and Recurrent Fallers in Parkinson's Disease.
Stefano Filippo Castiglia,Antonella Tatarelli,Dante Trabassi,Roberto De Icco,Valentina Grillo,Alberto Ranavolo,Tiwana Varrecchia,Fabrizio Magnifica,Davide Di Lenola,Gianluca Coppola,Donatella Ferrari,Alessandro Denaro,Cristina Tassorelli,Mariano Serrao +13 more
TL;DR: HR and RQAdet in the antero-posterior direction can both be used as age- and-speed-independent markers of gait instability, and was correlated with stride duration and cadence.
References
More filters
Journal ArticleDOI
Measuring the Strangeness of Strange Attractors
TL;DR: In this paper, the correlation exponent v is introduced as a characteristic measure of strange attractors which allows one to distinguish between deterministic chaos and random noise, and algorithms for extracting v from the time series of a single variable are proposed.
Journal ArticleDOI
Recurrence Plots of Dynamical Systems
TL;DR: In this article, a graphical tool for measuring the time constancy of dynamical systems is presented and illustrated with typical examples, and the tool can be used to measure the time complexity of a dynamical system.
Journal ArticleDOI
Embeddings and delays as derived from quantification of recurrence plots
TL;DR: Recurrence plots have been advocated as a useful diagnostic tool for the assessment of dynamical time series by quantifying certain features of these plots which may be helpful in determining embeddings and delays.
Journal ArticleDOI
Fundamental limitations for estimating dimensions and Lyapunov exponents in dynamical systems
Jean-Pierre Eckmann,David Ruelle +1 more
TL;DR: In this paper, it was shown that the correlation dimension of the Grassberger-Procaccia algorithm cannot exceed the value 2 log 10N if N is the number of points in the time series, and when this bound is saturated it is thus not legitimate to conclude that low dimensional dynamics is present.