Search Results - "Goldberger, L A"

Noise and poise: Enhancement of postural complexity in the elderly with a stochastic-resonance–based therapy by Costa, M, Priplata, A. A, Lipsitz, L. A, Wu, Z, Huang, N. E, Goldberger, A. L, Peng, C.-K

“…Pathologic states are associated with a loss of dynamical complexity. Therefore, therapeutic interventions that increase physiologic complexity may enhance…”
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Non-linear dynamics for clinicians: chaos theory, fractals, and complexity at the bedside by Goldberger, A L

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Maturation of gait dynamics: stride-to-stride variability and its temporal organization in children by Hausdorff, J. M, Zemany, L, Peng, C.-K, Goldberger, A. L

“…1  Margret H. A. Rey Laboratory for Nonlinear Dynamics in Medicine, 2  Gerontology Division and Department of Medicine, Beth Israel Deaconess Medical Center,…”
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The pNNx files: re-examining a widely used heart rate variability measure by Mietus, J E, Peng, C-K, Henry, I, Goldsmith, R L, Goldberger, A L

“…Objective: To re-examine the standard pNN50 heart rate variability (HRV) statistic by determining how other thresholds compare with the commonly adopted 50 ms…”
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Fractal correlation properties of R-R interval dynamics and mortality in patients with depressed left ventricular function after an acute myocardial infarction by Huikuri, H. V., Makikallio, T. H., Peng, C. K., Goldberger, A. L., Hintze, U., Moller, M.

“…BACKGROUND: Preliminary data suggest that the analysis of R-R interval variability by fractal analysis methods may provide clinically useful information on…”
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Physiological time-series analysis: what does regularity quantify? by Pincus, S. M., Goldberger, A. L.

“…Approximate entropy (ApEn) is a recently developed statistic quantifying regularity and complexity that appears to have potential application to a wide variety…”
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Dynamic markers of altered gait rhythm in amyotrophic lateral sclerosis by Hausdorff, Jeffrey M, Lertratanakul, Apinya, Cudkowicz, Merit E, Peterson, Amie L, Kaliton, David, Goldberger, Ary L

“…1  Margret and H. A. Rey Laboratory for Nonlinear Dynamics in Medicine and 2  Gerontology Division, Beth Israel Deaconess Medical Center, Boston 02215; 3…”
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Age-related alterations in the fractal scaling of cardiac interbeat interval dynamics by Iyengar, N., Peng, C. K., Morin, R., Goldberger, A. L., Lipsitz, L. A.

“…We postulated that aging is associated with disruption in the fractallike long-range correlations that characterize healthy sinus rhythm cardiac interval…”
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Decreased neuroautonomic complexity in men during an acute major depressive episode: analysis of heart rate dynamics by Leistedt, S J-J, Linkowski, P, Lanquart, J-P, Mietus, J E, Davis, R B, Goldberger, A L, Costa, M D

“…Major depression affects multiple physiologic systems. Therefore, analysis of signals that reflect integrated function may be useful in probing dynamical…”
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Gait variability and basal ganglia disorders: Stride-to-stride variations of gait cycle timing in parkinson's disease and Huntington's disease by Hausdorff, Jeffrey M., Cudkowicz, Merit E., Firtion, Renée, Wei, Jeanne Y., Goldberger, Ary L.

“…The basal ganglia are thought to play an important role in regulating motor programs involved in gait and in the fluidity and sequencing of movement. We…”
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PhysioBank, PhysioToolkit, and PhysioNet: components of a new research resource for complex physiologic signals by Goldberger, A L, Amaral, L A, Glass, L, Hausdorff, J M, Ivanov, P C, Mark, R G, Mietus, J E, Moody, G B, Peng, C K, Stanley, H E

“…The newly inaugurated Research Resource for Complex Physiologic Signals, which was created under the auspices of the National Center for Research Resources of…”
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Fractal dynamics of human gait: stability of long-range correlations in stride interval fluctuations by Hausdorff, J M, Purdon, P L, Peng, C K, Ladin, Z, Wei, J Y, Goldberger, A L

“…Fractal dynamics were recently detected in the apparently "noisy" variations in the stride interval of human walking. Dynamical analysis of these step-to-step…”
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Altered fractal dynamics of gait: reduced stride-interval correlations with aging and Huntington's disease by Hausdorff, Jeffrey M, Mitchell, Susan L, Firtion, Renee, Peng, C. K, Cudkowicz, Merit E, Wei, Jeanne Y, Goldberger, Ary L

“…Jeffrey M. Hausdorff 1 , Susan L. Mitchell 1 , 2 , Renée Firtion 3 , C. K. Peng 4 , Merit E. Cudkowicz 5 , Jeanne Y. Wei 1 , and Ary L. Goldberger 3 , 4 1…”
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Cardiac interbeat interval dynamics from childhood to senescence : comparison of conventional and new measures based on fractals and chaos theory by Pikkujamsa, S. M., Makikallio, T. H., Sourander, L. B., Raiha, I. J., Puukka, P., Skytta, J., Peng, C. K., Goldberger, A. L., Huikuri, H. V.

“…BACKGROUND: New methods of R-R interval variability based on fractal scaling and nonlinear dynamics ("chaos theory") may give new insights into heart rate…”
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Sleep-wake differences in scaling behavior of the human heartbeat: analysis of terrestrial and long-term space flight data by Ivanov PCh, Bunde, A, Amaral, L A, Havlin, S, Fritsch-Yelle, J, Baevsky, R M, Stanley, H E, Goldberger, A L

“…We compare scaling properties of the cardiac dynamics during sleep and wake periods for healthy individuals, cosmonauts during orbital flight, and subjects…”
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Is walking a random walk? Evidence for long-range correlations in stride interval of human gait by Hausdorff, J M, Peng, C K, Ladin, Z, Wei, J Y, Goldberger, A L

“…Complex fluctuations of unknown origin appear in the normal gait pattern. These fluctuations might be described as being 1) uncorrelated white noise, 2)…”
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Stochastic feedback and the regulation of biological rhythms by Ivanov PCh, Nunes Amaral, L A, Goldberger, A L, Stanley, H E

“…We propose a general approach to the question of how biological rhythms spontaneously self-regulate, based on the concept of "stochastic feedback". We…”
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Long-range anticorrelations and non-Gaussian behavior of the heartbeat by Peng, C.-K., Mietus, J., Hausdorff, J. M., Havlin, S., Stanley, H. E., Goldberger, A. L.

“…We find that the successive increments in the cardiac beat-to-beat intervals of healthy subjects display scale-invariant, long-range anticorrelations (up to 10…”
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Multifractality in human heartbeat dynamics by Ivanov, P. C., Amaral, L. A., Goldberger, A. L., Havlin, S., Rosenblum, M. G., Struzik, Z. R., Stanley, H. E.

“…There is evidence that physiological signals under healthy conditions may have a fractal temporal structure. Here we investigate the possibility that time…”
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Predicting survival in heart failure case and control subjects by use of fully automated methods for deriving nonlinear and conventional indices of heart rate dynamics by Ho, K. K., Moody, G. B., Peng, C. K., Mietus, J. E., Larson, M. G., Levy, D., Goldberger, A. L.

“…BACKGROUND: Despite much recent interest in quantification of heart rate variability (HRV), the prognostic value of conventional measures of HRV and of newer…”
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