Výsledky vyhledávání - "Maciej Gratkowski"

Bicycling suppresses abnormal beta synchrony in the Parkinsonian basal ganglia

Autor: Maciej Gratkowski, Dietmar Saupe, Alfons Schnitzler, Lena Storzer, Jan Vesper, Sarang S. Dalal, Omid Abbasi, Markus Butz, Jan Hirschmann

Publikováno v: Annals of Neurology. 82:592-601

Objective Freezing of gait is a poorly understood symptom of Parkinson disease, and can severely disrupt the locomotion of affected patients. However, bicycling ability remains surprisingly unaffected in most patients suffering from freezing, suggest

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d8e45d9e46f3276af8aab6d4ab7e149
https://doi.org/10.1002/ana.25047

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Inverse Modeling on Decomposed Electroencephalographic Data: A Way Forward?

Autor: Maciej Gratkowski, Massimiliano Valeriani, Asbjørn Mohr Drewes, Dina Lelic, Lars Arendt-Nielsen

Publikováno v: Lelic, D, Gratkowski, M, Valeriani, M, Arendt-Nielsen, L & Mohr Drewes, A 2009, ' Inverse Modeling on Decomposed Electroencephalographic Data: A Way Forward? ', Journal of Clinical Neurophysiology, vol. 26, no. 4, pp. 227-235 . https://doi.org/10.1097/WNP.0b013e3181aed1a1

Udgivelsesdato: 2009 Inverse modeling is typically applied to instantaneous electroencephalogram signals. However, this approach has several shortcomings including its instability to model multiple and deep located dipole sources and the interference

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0118934bf3b15e1396ecd1f0439b8499
https://doi.org/10.1097/wnp.0b013e3181aed1a1

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Decomposition of Biomedical Signals in Spatial and Time-frequency Modes

Autor: F. Zanow, Jens Haueisen, Maciej Gratkowski, A. Cn Chen, Lars Arendt-Nielsen

Publikováno v: Gratkowski, M, Haueisen, J, Arendt-Nielsen, L, Chen, A C N & Zanow, F 2008, ' Decomposition of biomedical signals in spatial and time-frequency modes ', Methods of Information in Medicine, vol. 47, no. 1, pp. 26-37 . https://doi.org/10.3414/ME0355
Europe PubMed Central

Summary Objectives: The purpose of this paper is to introduce a new method for spatial-time-frequency analysis of multichannel biomedical data. We exemplify the method for data recorded with a 31-channel Philips biomagnetometer. Methods: The method c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::967bedbd05f8f3085a220bac1c3770e9
https://doi.org/10.3414/me0355

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EP 60. Bicycling suppresses beta power more strongly than walking in the subthalamic nucleus of Parkinsonian patients

Autor: Jan Hirschmann, Dietmar Saupe, Omid Abbasi, Markus Butz, Alfons Schnitzler, Maciej Gratkowski, Lena Storzer, Sarang S. Dalal

Publikováno v: Clinical Neurophysiology. 127:e200

Introduction Walking abilities are severely affected in patients suffering from Freezing of Gait (FOG), a common phenomenon in advanced Parkinson’s disease (PD). Despite the high occurrence of the symptom in the progression of the disease, little i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::486e3a850dd3930f9133ab4b98d21499
https://doi.org/10.1016/j.clinph.2016.05.248

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Topographic analysis of engagement and disengagement of neural oscillators in photic driving: a combined electroencephalogram/magnetoencephalogram study

Autor: Andreas Halbleib, Carolin Ligges, Karin Schwab, Herbert Witte, Maciej Gratkowski, Jens Haueisen

Publikováno v: Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society. 29(1)

A coupled system of nonlinear neural oscillators with an individual resonance frequency is assumed to form the neuronal substrate for the photic driving phenomenon. The aim was to investigate the spatiotemporal stability of these oscillators and quan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f07efe5cd3d1d29de29a88665c8de8b
https://pubmed.ncbi.nlm.nih.gov/22353983

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Decomposition of Somatosensory Evoked Potentials in Rats

Autor: Jens Haueisen, Maciej Gratkowski, Daniel Güllmar, Silvio Schmidt, Otto W. Witte

Publikováno v: Biomedical Engineering / Biomedizinische Technik. 57

M. Gratkowski, Institute of Biomedical Engineering and Informatics, Ilmenau University of Technology, Ilmenau, Germany, maciej.gratkowski@tu-ilmenau.de S. Schmidt, Department of Neurology, Friedrich-Schiller-University, Jena, Germany D. Gullmar, Inst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::577bc01c19f6f42fcf8d1946b90659b0
https://doi.org/10.1515/bmt-2012-4447

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Multichannel Matching Pursuit Validation and Clustering - a Simulation and Empirical Study

Autor: Asbjørn Mohr Drewes, Maciej Gratkowski, Dina Lelic, Kristian Hennings

Publikováno v: Lelic, D, Gratkowski, M, Hennings, K & Drewes, A M 2011, ' Multichannel Matching Pursuit Validation and Clustering-a Simulation and Empirical Study ', Journal of Neuroscience Methods, vol. 196, no. 1, pp. 190-200 . https://doi.org/10.1016/j.jneumeth.2010.12.021
Lelic, D, Gratkowski, M, Hennings, K & Drewes, A M 2011, ' Multichannel matching pursuit validation and clustering : A simulation and empirical study ', Journal of Neuroscience Methods, vol. 196, no. 1, pp. 190-200 . https://doi.org/10.1016/j.jneumeth.2010.12.021

Introduction Multichannel matching pursuit (MMP) is a relatively new method that can be applied to electroencephalogram (EEG) signals in combination with inverse modelling. However, limitations of MMP have not been adequately tested. The aims of this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e0a6bc3ef3622a9640ef2b0898d5f77
https://pure.au.dk/portal/da/publications/multichannel-matching-pursuit-validation-and-clustering--a-simulation-and-empirical-study(587f31c2-3e3a-4880-8b16-d56478bc523f).html

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Time-Frequency-Space Components of Somatosenory Evoked Potentials in Rats

Autor: Otto W. Witte, S. Schmidt, Michael Eiselt, Jens Haueisen, Maciej Gratkowski, Frank Gießler, Daniel Güllmar

Publikováno v: IFMBE Proceedings ISBN: 9783642235078

This paper presents a description of components extracted from somatosensory evoked potentials recorded from rats after electrical stimulation of the forelimb. For the decomposition of SEPs Topographic Matching Pursuit method was used. This method is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::651d5e63b4d84e90d99386256673e7b0
https://doi.org/10.1007/978-3-642-23508-5_54

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The Epsilon-Skew-Normal dictionary for the decomposition of single- and multichannel biomedical recordings using Matching Pursuit algorithms

Autor: Daniel Strohmeier, A. Halbleib, Jens Haueisen, Maciej Gratkowski

Publikováno v: XII Mediterranean Conference on Medical and Biological Engineering and Computing 2010 ISBN: 9783642130380

Matching Pursuit based algorithms are a well-established method for decomposing single- and multichannel biomedical recordings. Due to the time-frequency-characteristics, Gabor dictionaries are commonly used. However, symmetric Gabor atoms fail at ap

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6af833b381f9ba087fe8f020c22c6692
https://doi.org/10.1007/978-3-642-13039-7_25

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Is the pain in chronic pancreatitis of neuropathic origin? Support from EEG studies during experimental pain

Autor: Georg Dimcevski, Lars Arendt-Nielsen, Peter Funch-Jensen, Maciej Gratkowski, Asbjørn Mohr Drewes, Saber A.K. Sami

Publikováno v: Drewes, A M, Gratkowski, M, Sami, S A K, Dimcevski, G, Funch-Jensen, P & Arendt-Nielsen, L 2008, ' Is the pain in chronic pancreatitis of neuropathic origin? support from EEG studies during experimental pain ', World Journal of Gastroenterology, vol. 14, no. 25, pp. 4020-4027 . https://doi.org/10.3748/wjg.14.4020
Drewes, A M, Gratkowski, M, Sami, S A K, Dimcevski, G, Funch-Jensen, P & Arendt-Nielsen, L 2008, ' Is the pain in chronic pancreatitis of neuropathic origin? Support from EEG studies during experimental pain ', World Journal of Gastroenterology, vol. 14, no. 25, pp. 4020-7 .

Udgivelsesdato: 2008-Jul-7 AIM: To prove the hypothesis that patients with chronic pancreatitis would show increased theta activity during painful visceral stimulation. METHODS: Eight patients and 12 healthy controls underwent an experiment where the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c6153c06744af2886dc63e8df403c44
https://pubmed.ncbi.nlm.nih.gov/18609686

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