General information
Application examples
Muscle electric stimulation
Knee reflex
Loading test
Muscle tone asymmetry
Technical means
Vibrational viscoelastometer
Additional information
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Русская версия
Mechanical impedance
Radiophysics in medicine


Figure below shows an example of record of elastic (curve 2) and viscous (curve 3) parameters alteration during the excitation of the knee reflex in m. quadriceps femoris. The registration of viscoelastic properties of muscles was performed by means of portable "Vibrational Viscoelastometer". The knee reflex was caused by the stroke of neurological hammer provided with an accelerometer on the tendon of m. quadriceps femoris. The accelerometer signal (curve 1) was also recorded in computer and was used to estimate the stroke force as well as a reference to measure the delay time of response relatively to the stroke moment.
To characterize the muscular response the magnitude of muscle elasticity variation was measured. All measurements were performed for left and right leg of eleven persons with no pronounced violations in their locomotive systems. The results of processing of these data are shown on the next figure. Here one can easily see the correlation between stroke force and the magnitude of elasticity variation and the inverse correlation between the stroke force and the stroke-response delay time (shown as the circle diameter).