[Parameters of voluntary effort correlates with functional state of the motor control system].

The spectrum oscillations of a prolonged supported effort that was registered at isometric regimen in 3 age groups of healthy volunteers, were analyzed. Changes in distribution of spectral density of effort oscillations and distinction in distribution of spectral density as a reaction to fatigue in age groups, were shown. The revealed amplitude-frequency ranges of changes of spectral density of effort oscillations characterize activity of suprasegmental and segmental levels of motor control system fulfilling the voluntary movement control and the automatic regulation of posture. The correlates with functional state of motor control system are considered in the terms of voluntary and involuntary components of regulation. The substantial growth of activity in the central structures of motor control system in process of development of fatigue and the narrowing of the frequency range of activity of sub-cortical structures with age, were revealed.