The ultrasound doppler response at isometric muscular reductions
Keywords:
ultrasound Doppler myography, sarcomere, muscular reductions, Doppler spectrum, monitoringAbstract
By means of ultrasound Doppler method research of spectral characteristics of local isometric reductions of skeletal muscular fabrics in vivo is carried out. Local moving was registered on muscles of the forearm of four completely healthy volunteers under the action of constant loading of various sizes and also in a condition of full relaxation. For all volunteers, it is established, that the basic difference of peak-frequency characteristics of isometric muscular fluctuations at various loadings consists in the size of the amplitude of fluctuations while spectral characteristics remain practically invariable. This is explained by the that a major spectra formation factor of fluctuations is mechanochemical characteristics of fluctuation movements of cross-section bridges in overlapping areas actin and myosin filaments. At the same time, some difference of spectral characteristics for different volunteers is observed.
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