Bispectral analysis of surface EMG
ΣυγγραφέαςKaplanis, P. A.
Pattichis, Constantinos S.
Hadjileontiadis, L. J.
Panas, S. M.
SourceProceedings of the Mediterranean Electrotechnical Conference - MELECON
10th Mediterranean Electrotechnical Conference (MALECON2000)
Google Scholar check
MetadataΕμφάνιση πλήρους εγγραφής
The objective of this ongoing study is to investigate whether or not Bispectral analysis (BS), a particular form of higher order spectra (HOS), may be utilized for analyzing the surface electromyographic signal (SEMG). The bicoherence index was used for characterizing the Gaussianity of the signal. Results indicate that SEMG signal distribution is highly non-Gaussian at low and high levels of force whereas the distribution has its maximum Gaussianity at the mid level of maximum voluntary contraction (MVC), i.e. at 50%. A measure of the linearity of the signal, based on deciding whether or not the estimated bicoherence is constant, follows the reverse pattern with the measure of Gaussianity. The power spectrum's (PS) median frequency, decreases from 105 to 93 Hz with increase of force, whereas the number of turns and the number of zero crosses increase with force. Further work is currently in progress in order to evaluate the usefulness of HOS in normal subjects and subjects suffering from neuromuscular disorders.
Showing items related by title, author, creator and subject.
Generalized least squares for assessing trends in cumulative meta-analysis with applications in genetic epidemiology Bagos, Pantelis G.; Nikolopoulos, Georgios K. (2009)Objective: Cumulative meta-analysis allows the evaluation of a study's contribution to the combined effect of the preceding research. It accrues evidence, gradually adding studies one at a time and provides updated estimates ...
Spectral density ratio based clustering methods for the binary segmentation of protein sequences: A comparative study Ioannou, Androulla; Fokianos, Konstantinos; Promponas, Vasilis J. (2010)We compare several spectral domain based clustering methods for partitioning protein sequence data. The main instrument for this exercise is the spectral density ratio model, which specifies that the logarithmic ratio of ...
Mixed-effects poisson regression models for meta-analysis of follow-up studies with constant or varying durations Bagos, Pantelis G.; Nikolopoulos, Georgios K. (2009)We present a framework for meta-analysis of follow-up studies with constant or varying duration using the binary nature of the data directly. We use a generalized linear mixed model framework with the Poisson likelihood ...