Scaling analysis of the effects of load on hand tremor movements in essential tremor
Abstract
In this paper we have used the Wavelet Transform (WT) and the Detrended Fluctuation Analysis (DFA) methods to analyze hand tremor movements in essential tremor (ET), in two different recording conditions (before and after the addition of wrist-cuff load). We have analyzed the time series comprised of peak-to-peak (PtP) intervals, extracted from regions around the first three main frequency components of the power spectra (PwS) of the recorded tremors, in order to substantiate results related to the effects of load on ET, to distinguish between multiple sources of ET, and to separate the influence of peripheral factors on ET. Our results show that, in ET, the dynamical characteristics, that is, values of respective scaling exponents, of the main frequency component of recorded tremors change after the addition of load. Our results also show that in all the observed cases the scaling behavior of the calculated functions changes as well the calculated WT scalegrams and DFA functions displ...ay a shift in the position of the crossover when the load is added. We conclude that the difference in behavior of the WT and DFA functions between different conditions in ET could be associated with the expected pathology in ET, or with some additional mechanism that controls movements in ET patients, and causes the observed changes in scaling behavior.
Keywords:
Tremor / Essential tremor / Load / Wavelet transform analysis / DFA methodSource:
Physica A-Statistical Mechanics & its Applications, 2011, 390, 10, 1741-1746Publisher:
- Elsevier, Amsterdam
Funding / projects:
- Phase Transitions and Characterization of Inorganic and Organic Systems (RS-171015)
- Noninvasive modulation of cortical excitability and plasticity - Noninvasive neuromodulation of the CNS in the study of physiological mechanisms, diagnosis and treatment (RS-175012)
- Istraživanje kliničkih i genetičkih korelacija motornih i nemotornih ispoljavanja bolesti nevoljnih pokreta (RS-145057)
DOI: 10.1016/j.physa.2010.12.037
ISSN: 0378-4371
WoS: 000289335700005
Scopus: 2-s2.0-79952620212
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Institution/Community
Stomatološki fakultetTY - JOUR AU - Blesić, Suzana AU - Stratimirović, Đorđe AU - Milošević, S. AU - Marić, J. AU - Kostić, V. AU - Ljubisavljević, M. PY - 2011 UR - https://smile.stomf.bg.ac.rs/handle/123456789/1622 AB - In this paper we have used the Wavelet Transform (WT) and the Detrended Fluctuation Analysis (DFA) methods to analyze hand tremor movements in essential tremor (ET), in two different recording conditions (before and after the addition of wrist-cuff load). We have analyzed the time series comprised of peak-to-peak (PtP) intervals, extracted from regions around the first three main frequency components of the power spectra (PwS) of the recorded tremors, in order to substantiate results related to the effects of load on ET, to distinguish between multiple sources of ET, and to separate the influence of peripheral factors on ET. Our results show that, in ET, the dynamical characteristics, that is, values of respective scaling exponents, of the main frequency component of recorded tremors change after the addition of load. Our results also show that in all the observed cases the scaling behavior of the calculated functions changes as well the calculated WT scalegrams and DFA functions display a shift in the position of the crossover when the load is added. We conclude that the difference in behavior of the WT and DFA functions between different conditions in ET could be associated with the expected pathology in ET, or with some additional mechanism that controls movements in ET patients, and causes the observed changes in scaling behavior. PB - Elsevier, Amsterdam T2 - Physica A-Statistical Mechanics & its Applications T1 - Scaling analysis of the effects of load on hand tremor movements in essential tremor VL - 390 IS - 10 SP - 1741 EP - 1746 DO - 10.1016/j.physa.2010.12.037 ER -
@article{ author = "Blesić, Suzana and Stratimirović, Đorđe and Milošević, S. and Marić, J. and Kostić, V. and Ljubisavljević, M.", year = "2011", abstract = "In this paper we have used the Wavelet Transform (WT) and the Detrended Fluctuation Analysis (DFA) methods to analyze hand tremor movements in essential tremor (ET), in two different recording conditions (before and after the addition of wrist-cuff load). We have analyzed the time series comprised of peak-to-peak (PtP) intervals, extracted from regions around the first three main frequency components of the power spectra (PwS) of the recorded tremors, in order to substantiate results related to the effects of load on ET, to distinguish between multiple sources of ET, and to separate the influence of peripheral factors on ET. Our results show that, in ET, the dynamical characteristics, that is, values of respective scaling exponents, of the main frequency component of recorded tremors change after the addition of load. Our results also show that in all the observed cases the scaling behavior of the calculated functions changes as well the calculated WT scalegrams and DFA functions display a shift in the position of the crossover when the load is added. We conclude that the difference in behavior of the WT and DFA functions between different conditions in ET could be associated with the expected pathology in ET, or with some additional mechanism that controls movements in ET patients, and causes the observed changes in scaling behavior.", publisher = "Elsevier, Amsterdam", journal = "Physica A-Statistical Mechanics & its Applications", title = "Scaling analysis of the effects of load on hand tremor movements in essential tremor", volume = "390", number = "10", pages = "1741-1746", doi = "10.1016/j.physa.2010.12.037" }
Blesić, S., Stratimirović, Đ., Milošević, S., Marić, J., Kostić, V.,& Ljubisavljević, M.. (2011). Scaling analysis of the effects of load on hand tremor movements in essential tremor. in Physica A-Statistical Mechanics & its Applications Elsevier, Amsterdam., 390(10), 1741-1746. https://doi.org/10.1016/j.physa.2010.12.037
Blesić S, Stratimirović Đ, Milošević S, Marić J, Kostić V, Ljubisavljević M. Scaling analysis of the effects of load on hand tremor movements in essential tremor. in Physica A-Statistical Mechanics & its Applications. 2011;390(10):1741-1746. doi:10.1016/j.physa.2010.12.037 .
Blesić, Suzana, Stratimirović, Đorđe, Milošević, S., Marić, J., Kostić, V., Ljubisavljević, M., "Scaling analysis of the effects of load on hand tremor movements in essential tremor" in Physica A-Statistical Mechanics & its Applications, 390, no. 10 (2011):1741-1746, https://doi.org/10.1016/j.physa.2010.12.037 . .