INVESTIGADORES
FELICE Carmelo Jose
artículos
Título:
Propagation velocity measurement autocorrelation technique applied to the electromyogram
Autor/es:
SPINELLI, ENRIQUE; FELICE, CARMELO JOSÉ; MAYOSKY, MIGUEL; POLITTI, JULIO CESAR; VALENTINUZZI, MÁXIMO EUGENIO
Revista:
MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING
Referencias:
Año: 2001 vol. 39 p. 590 - 593
ISSN:
0140-0118
Resumen:
Muscle fibre conduction velocity
is an important measurement in electrophysiology,both in the research laboratory
and in clinical practice. It is usually measured by placing electrodes
spaced at known distances and estimating the transit time of the action
potential. The problem, common to all methods, is the estimation of this time delay.
Several measurement procedures, in the time and frequency domains, have been
proposed. Time-domain strategies usually require two acquisition channels, whereas
some frequency-domain methods can be implemented using a single one. The method
described operates in the time domain, making use of the autocorrelation
function of the difference signal obtained from two needle electrodes and only one
acquisition channel. Experimental results were obtained from the electromyogram
of two biceps muscles (two adult male subjects, nine records each) under voluntary
contraction, yielding an average of 3.58ms-1(SD.0.04ms-1) and 3.37ms-1 (SD.0.03ms-1), respectively. Several tests showed that the proposed method works
properly with electromyogram records as short as 0.3s.