Operation Manual

MyotonPRO User Manual
Page 10 of 108
1.3 Description of the Device
The Device has been designed for the non-invasive measurement of any single superficial
skeletal muscle (hereafter “Muscle”) and other biological soft tissue (hereafter “Tissue”), either
in the relaxed or in the contracted state.
The Device contains a system which allows measurements to be taken in any orientation in
relation to Earth gravity vector as well as in zero gravity.
Tissue types which can be measured include:
 single superficial skeletal muscles,
 tendons, ligaments, other superficial biological soft tissues.
The Device can take measurements:
 in different body positions,
 at different angles (360⁰),
 in Earth’s gravity as well as in zero gravity,
 reproducibly and repeatedly,
 independently,
 portably,
 non-invasively and painlessly,
 cost-effectively (cheaply),
 quickly.
1.3.1 Measurable parameters
The Device calculates the following five parameters
2
:
 State of tension:
1. F - Natural oscillation frequency [Hz] characterising TONE
3
;
 Biomechanical properties:
2. D - Logarithmic Decrement of natural oscillation, characterising ELASTICITY;
3. S - Dynamic STIFFNESS [N/m];
 Viscoelastic properties:
4. C - ratio of relaxation time to deformation time, characterising CREEP (Deborah number);
5. R - Mechanical Stress Relaxation time [ms].
2
Definitions of parameters are given in Appendix 1.
3
An indication of Muscle TONE can only be measured in its relaxed state. In its contracted state, the F parameter
characterises the Muscle tension.