BIOMECHANICAL AND NEUROPHYSIOLOGICAL PATT ERNS OF VOLUNTARY RHYTHMIC MOVEMENTS IN HUMANS

Amplitude modulation of electroencephalogram and H-reflex were studied under realization and completion of voluntary rhythmic movements and its modelling by means by electrical stimulation of the triceps sure m uscles in humans. The changes of spinal cord alpha-motoneurons excitab ility was correlated with the cycle duration under rhythmic voluntary movements realization and not depend on cycle duration under its seman tic completion. The alpha-motoineurons excitability was stable and did not determine by model movement frequency in condition of rhythmic el ectrical stimulation and after its stopping. Analysis amplitude modula tion of electroencephalogram and H-reflex under voluntary rhythmic mov ements showed correlation between cortical and spinal processes under its organization.