Russian Academy of Sciences
Conferences and seminars
Nizhny Novgorod, 46 Uljanov str.
Phone: (7 8312) 36-56-60 FAX: (7 8312) 36-37-92
Historically the first appeared a direction connected with quantitative studies of vibroacoustical activity in cardiovascular system. The essential success of medium 70-th in this direction was a measurement, in laboratory conditions and in the space flight, of absolute values of spectral components of the force, acting on the human body from the working heart. Piezoaccelerometers PAMT and their construction elements, developed for measurement of human body fluctuations in the weightlessness, up to the present time are used not only for medical, as well as for technical vibrational diagnostics.
Since 1980 studies of human body vibrations, accompanying locomotion, were begun for clinical and cosmic medicine. It was shown here that on acceleration spectra, measured on the corresponding areas, it is possible to evaluate the condition of joint surfaces, the decay degree of bone-cartilage complex, the stability of vertical pose, the level of pain syndrome and others. The unknown earlier fluctuations of statically stressed muscles within the 3 kHz frequency range were registered, connected probably with the motion of protein molecules during the muscle contraction.
In connection with the arising problems of interfaces for man-machine systems and of electronic prosthetic devices of organs, the ideas were worded of making the additional sensor channels and new approaches were offered to study functions of analyzers, based on the measurement of casual errors in their work. So, for the biceps it was demonstrated in the experiment that dependency of its tension fluctuations from the value of this tension qualitatively coincides with the Weber-Fechner law, describing the main psychophysical low for the dependency of perception level from the value of stimulus.
Studies of rheological characteristics of
biological soft tissues, based on the use of
low-frequency (shear) acoustic oscillations and waves,
were begun for solving the metrology problems when
measuring the human body oscillations by contact
transducers, firstly by accelerometers PAMT. It had
became clear soon that such studies have an independent
interest for checking the fine realignments of tissues
internal structure in the course of natural physiological
or pathological processes. That opens new possibilities
for fundamental studies of neurophysiological mechanisms
of checking and control of the condition of human organs