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Your search keyword '"Elger, C. E."' showing total 945 results
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945 results on '"Elger, C. E."'

1. Quantification of depth of anesthesia by nonlinear time series analysis of brain electrical activity

Author

Widman, G., Schreiber, T., Rehberg, B., Hoeft, A., and Elger, C. E.

Subjects
Nonlinear Sciences - Chaotic Dynamics, Quantitative Biology
Abstract

We investigate several quantifiers of the electroencephalogram (EEG) signal with respect to their ability to indicate depth of anesthesia. For 17 patients anesthetized with Sevoflurane, three established measures (two spectral and one based on the bispectrum), as well as a phase space based nonlinear correlation index were computed from consecutive EEG epochs. In absence of an independent way to determine anesthesia depth, the standard was derived from measured blood plasma concentrations of the anesthetic via a pharmacokinetic/pharmacodynamic model for the estimated effective brain concentration of Sevoflurane. In most patients, the highest correlation is observed for the nonlinear correlation index D*. In contrast to spectral measures, D* is found to decrease monotonically with increasing (estimated) depth of anesthesia, even when a "burst-suppression" pattern occurs in the EEG. The findings show the potential for applications of concepts derived from the theory of nonlinear dynamics, even if little can be assumed about the process under investigation., Comment: 7 pages, 5 figures

Published
2000
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2. Nonlinear denoising of transient signals with application to event related potentials

Author

Effern, A., Lehnertz, K., Schreiber, T., Grunwald, T., David, P., and Elger, C. E.

Subjects
Physics - Data Analysis, Statistics and Probability, Physics - Medical Physics, Quantitative Biology
Abstract

We present a new wavelet based method for the denoising of {\it event related potentials} ERPs), employing techniques recently developed for the paradigm of deterministic chaotic systems. The denoising scheme has been constructed to be appropriate for short and transient time sequences using circular state space embedding. Its effectiveness was successfully tested on simulated signals as well as on ERPs recorded from within a human brain. The method enables the study of individual ERPs against strong ongoing brain electrical activity., Comment: 16 pages, Postscript, 6 figures, Physica D in press

Published
2000
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3. A Robust Method for Detecting Interdependences: Application to Intracranially Recorded EEG

Author

Arnhold, J., Grassberger, P., Lehnertz, K., and Elger, C. E.

Subjects
Nonlinear Sciences - Chaotic Dynamics, Quantitative Biology
Abstract

We present a measure for characterizing statistical relationships between two time sequences. In contrast to commonly used measures like cross-correlations, coherence and mutual information, the proposed measure is non-symmetric and provides information about the direction of interdependence. It is closely related to recent attempts to detect generalized synchronization. However, we do not assume a strict functional relationship between the two time sequences and try to define the measure so as to be robust against noise, and to detect also weak interdependences. We apply our measure to intracranially recorded electroencephalograms of patients suffering from severe epilepsies., Comment: 29 pages, 5 figures, paper accepted for publication in Physica D

Published
1999
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7. Empfehlungen zu Blutuntersuchungen und klinischer Überwachung zur Früherkennung des Valproinsäure-assoziierten Leberversagens : Ergebnisse einer Konsensus-Konferenz vom 9.5.–11.5. 1997 in Berlin

Author

König, St. A., Elger, C. E., Vassella, F., Schmidt, D., Bergmann, A., Boenigk, H. E., Despland, P. A., Genton, P., Krämer, G., Löscher, W., Mayer, T., Nau, H., Schneble, H., Siemes, H., Stefan, H., Wolf, P., Krämer, Günter, editor, and Walden, Jörg, editor

Published
2002
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22. Schlaf und Epilepsie

Author

Burr, W., Elger, C. E., Arbeitsgruppe „Klinische Zeitreihenanalyse“, Peter, Jörg Hermann, editor, Penzel, Thomas, editor, Cassel, Werner, editor, and von Wichert, Peter, editor

Published
1993
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23. Therapy monitoring

Author

Kühne, I., Ceballos-Baumann, A. O., Conrad, B., Kruggel, F., von Einsiedel, H. Gräfin, Schneider, R., Kluge, R., Willmes, K., Stephan, K. M., Netz, J., Hömberg, V., Schönle, P. W., Schwall, D., Bischoff, C., Machetanz, J., Meyer, B.-U., Pallmann, F., Ohlmann, D., Krick, C., Jäger, H., Nachtigall, W., Schimrigk, K., Forster, J., Meyer, B. U., Bresser, B., Thomas, W., Schmitt, R. M., Mielke, U., Welsch, H. J., Lagler, E., Dillmann, U., Krämer, G., Lüder, G., Hopf, H. C., Haupt, W. F., Borberg, H., Rosenow, F., Stoll, M., Hamann, G., Donauer, E., Steudel, W. I., Elek, J. M., Orfgen, Th., Sieb, J. P., Dengler, R., Strittmatter, M., Holzer, G., Haaß, A., Rose, A., Westarp, M. E., Flügel, R. M., Bartmann, P., Fuchs, D., Hoff-Jörgensen, R., Clausen, D., Westarp, M. P., Kornhuber, H. H., Westphal, K. P., Bauer, J., Laupheimer, H., Hülser, P., Schreiber, H., Baumgärtner, K., Wollinsky, K. H., van Eick, H., Heidenreich, F., Leifeld, L., Benecke, R., Jost, Wolfgang H., Schimrigk, Klaus, Bergemann, N., Baas, H., Demisch, L., Fischer, P.-A., Alesch°, F., Fertl, E., Auff, E., Koos, W., Bauer, B., Schmidt, B., Grau, G., Henschel, S., Braus, Dieter F., Schwechheimer, Karl, Volk, Benedikt, Claus, D., Beck, E., Gmeiner, H. J., Puschmann, E., Brunhölzl, C., Jäger, W., Neundörfer, B., Seitz, R. J., Schlaug, G., Kleinschmidt, A., Reifenberger, G., Wechsler, W., Wirrwar, A., Nebeling, B., Treede, R.-D., Hansen, H. C., Kunze, K., Bufler, J., Toyka, K. V., Maelicke, A., Franke, Ch., Melms, A., Malcherek, G., Link, H., Kalbacher, H., Lindstrom, J., Oksenberg, J., Steinman, L., Müller, C., Platz, T., Denzler, P., Mauritz, K.-H., Binkofski, F., Kunesch, E., Kuhlmann, H., Hefter, H., Freund, H-J., Weindl, A., Boecker, H., Kuwert, T., Mayer, T., Winkler, B., Herzog, H., Feinendegen, L. E., Arnold, G., Eichhorn, T., Mai, N., Gasser, T., Marquard, C., Oertel, W. H., Werhahn, K. J., Fong, J., Rothwell, J. C., Shorvon, S., Thompson, P. D., Marsden, C. D., Elger, C. E., Hefner, G., Güldenberg, V., Meierkord, H., Lightman, St., Trimble, M., Jaspert, A., Spitzer, A., Grehl, H., Henningsen, H., Pause, M., Mundinger, F., Schwab, J., Günther, T., Kaendler, S. H., Enzensberger, W., Fischer, P-A., Raitzig, M., Müller, J., Zinner, J., Kasper, S., Stuerenburg, H. J., Hase, M., Hinse, P., Neunzig, P., Weis, M., Rechlin, T., Hilz, M. J., and Schimrigk, K.

Published
1992
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44. Reproductive dysfunction in women with epilepsy: recommendations for evaluation and management. (Paper)

Author

Bauer, J., Isojarvi, J. I. T., Herzog, A. G., Reuber, M., Polson, D., Tauboll, E., Genton, P., Ven, H. van der, Roesing, B., Luef, G. J., Galimberti, C. A., Parys, J. van, Flugel, D., Bergmann, A., and Elger, C. E.

Subjects
Reproduction -- Physiological aspects -- Research, Endocrinology -- Research -- Physiological aspects, Epileptics -- Research -- Physiological aspects, Epilepsy -- Physiological aspects -- Research, Infertility, Female -- Physiological aspects -- Research, Health, Psychology and mental health, Physiological aspects, Research
Abstract

Background: Epilepsy is commonly associated with reproductive endocrine disorders. These include polycystic ovary syndrome (PCOS), isolated components of this syndrome such as polycystic ovaries, hyperandrogenaemia, hypothalamic amenorrhoea, and functional hyperprolactinaemia. [...]

Published
2002

46. Empfehlungen zu Blutuntersuchungen und der klinischen Überwachung zur Früherkennung des Valproat-assoziierten Leberversagens Ergebnisse einer Konsensus-Konferenz vom 9.5.–11.5.1997 in Berlin: Ergebnisse einer Konsensus-Konferenz vom 9.5.–11.5.1997 in Berlin

Author

König, St. A., Elger, C. E., Vasella, F., Schmidt, D., Bergmann, A., Boenigk, H. E., Despland, P. A., Genton, P., Krämer, G., Löscher, W., Mayer, T., Nau, H., Schneble, H., Siemes, H., Stefan, H., and Wolf, P.

Published
1999
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49. Empfehlungen zu Blutuntersuchungen und klinischer Überwachung zur Früherkennung des Valproat-assoziierten Leberversagens Ergebnisse einer Konsensus-Konferenz vom 9.5.–11.5. 1997 in Berlin: Ergebnisse einer Konsensus-Konferenz vom 9.5.–11.5. 1997 in Berlin

Author

König, S. A., Elger, C. E., Vassella, F., Schmidt, D., Bergmann, A., Boenigk, H. E., Despland, P. A., Genton, P., Krämer, G., Löscher, W., Mayer, T., Nau, H., Schneble, H., Siemes, H., Stefan, H., and Wolf, P.

Published
1998
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