Vol. 12, no.3, 2020
РусскийEnglish
MEDICAL PHYSICS
INVESTIGATION OF DISTRIBUTION LAWS OF THE PHASE DIFFERENCE OF THE ENVELOPES OF ELECTROMYOGRAMS OF ANTAGONIST MUSCLES IN PARKINSON'S DISEASE AND ESSENTIAL TREMOR PATIENTS
Olga S. Sushkova, Alexei A. Morozov, Ivan A. Kershner, Nadezhda G. Petrova
Kotelnikov Institute of Radioengineering and Electronics of RAS, http://www.cplire.ru/
Moscow 125009, Russin Federation
E-mail: o.sushkova@mail.ru, morozov@cplire.ru, ivan.kershner@gmail.com, petrova@cplire.ru
Alexandra V. Gabova
Institute of Higher Nervous Activity and Neurophysiology of RAS, http://ihna.ru/
Moscow 117485, Russian Federation
E-mail: agabova@yandex.ru
Larisa A. Chigaleychik, Alexei V. Karabanov
FSBI Rearch Center of Neurology, https://www.neurology.ru/
Moscow 125367, Russian Federation
E-mail: chigalei4ick.lar@yandex.ru, doctor.karabanov@mail.ru
Received October 05, 2020; peer reviewed October 12, 2020; accepted October 14, 2020
Abstract. An investigation of surface electromyogram (EMG) of antagonist muscles in patients with Parkinson's disease (PD) and essential tremor (ET) was carried out. A comparison was made between two methods for calculating instantaneous phases of envelopes of EMG signals. The first method is based on calculating the ridges of wavelet spectrograms of envelopes of EMG signals. The second method is based on using the Hilbert transform. Statistically significant difference between the mean values of the phase difference of the EMG signal envelopes was found in the antagonist muscles in PD and ET patients.
Keywords: phase difference, electromyogram, EMG, wavelet spectrogram, wavelet, Parkinson's disease, essential tremor, ridges of wavelet spectrograms, the Hilbert transform
UDC 519.67, 612.8, 53.083, 519.24, 004.93
RENSIT, 2020, 12(3):415-428. DOI: 10.17725/rensit.2020.12.415.
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/348/12(3)415-428e.pdf