[Spinal locomotor generators in humans: problems in assessing effectiveness of stimulations].

The paper considers a variant of solving the problem of movement of spinal patients, which is based on the use of the natural location control system contained in the spinal cord. The application areas and electrostimulation parameters which are most effective for locomotion have been determined. The optimum external conditions for walking have been defined.

[Electrostimulation of the spinal cord as a method of inducing locomotor activity in children (clinical aspects and technical problems)].

Coordination locomotor movements of the lower extremities are induced in children paralyzed due to spinal diseases and injuries. This is achieved by electrostimulation of the intumescentia lumbalis by individually selecting stimulating parameters. The prospects of wide introduction of the procedure into a package of motor rehabilitative treatment are associated with the design of automatic systems for selection and correction of these parameters.

[The effect of the dynamic component in the mechanical deformation of the vessels on the blood supply to the skeletal muscles].

Dynamic and static distension of the cat m. gastrocnemius by 10-20% of initial length induced similar hyperemia provided the same amplitude of the distension and a common impulse of passive strength are preserved. The post-elongation hyperemia did not depend on changes in the blood flow during distension or on increase in the number of dynamic components of the distension.

Work of the motor units in human antagonists during rhythmic movements.

Firing of single motor units (MUs) from m. biceps brachii and m. triceps brachii has been studied with rhythmic successive flexion and extension in the elbow.

Variability of the interimpulse intervals of motor units upon voluntary activation.

Twenty subjects were investigated for voluntary control of separate motor units (MU) in the biceps brachii muscle under visual and auditory feedback. After 20-fold repetition of the task for sustaining stable firing frequency it turned out that in every trial the frequency was different and the variability of the interimpulse intervals changed in an unexpected way. It increased with the lengthening of the interimpulse intervals, but in an uneven manner.

[Voluntary control of the activity of the individual motor units of different muscles].

16 subjects learned in feedback experiments to control activity of separate motor units (MU) in muscles of face, neck, hand, forearm, arm, thigh and crus. The test consisted in modulation of frequency and duration of the MU firing. The time total of the test, number of MU acting correctly, ratio of the "controllable" units to the number of units studied in a particular muscle, were recorded.

[Analysis of an instrumental defense response on dogs following stimulation of the head of the caudate nucleus].

In chronic experiments on dogs taught to instrumental avoiding of electrical shock, changes in organization and regulation of movements on electrical stimulation of head of the caudate nucleus via implanted electrodes, were studied. The preliminary low-frequency stimulation increased the latency, altered the posture readjustment, EMGs, and mechanograms of movements. Markedness of the changes depended on the strength of stimulating current.