[Recovery process after the diphtheric polyneuropathy according to interference electromyography].

In order to control the recovery process after diphtheric polyneuropathy the dynamics of activity of m.flexor carpi radialis with increasing force was repetitively investigated in 12 patients using surface electromyography (EMG). In patients examined 12.

[Comparative characterization of the thermoregulatory activity of motor units in "spinal" and intact cats].

The functional features of motor units (MU) were studied in spinal (n = 26) and intact (n = 18) cats during thermoregulatory muscle activity (TMA). The spinal cats were demonstrated to retain the ability to generate TMA though MU activity was extremely irregular. Thus, the variability of interspike intervals (ISI) was 100 to 400 msec at firing rates of 1-10 imp per sec).

[The activity of the motor units of the feline esophagus under cooling].

The background activity of the oesophagus motor units (MUs) was found to depend on respiration and to be facilitated in cooling. The MUs patterns of discharges involved a phasic activity and a tonic one. The firing rate of the MUs increased during expiration.

[The dependence of the thermoregulating activity of motor units and of the rate of muscle contraction on body mass in mammals].

Regression analysis corroborated the trend towards an increase in the units firing rate and the muscle contraction velocity occurring in diminishing of the mammals' body mass. These relationships seem to be universal and can be the basis for explanation of the reverse dependence of basal metabolism on the body size.

[The characteristics of the impulse activity of the motor units of the muscles in the pelvic floor in the cat].

The investigation have been designed to elucidate the background and thermoregulatory activity (TA) of the motor units (MUs) of pelvic floor muscles (m. spincter ani externus, m. levator ani) and hind limb muscle (m.

[The patterns of the bioelectrical activity of motor units in different forms of parkinsonism].

The correlation between the motor units activity patterns and clinical forms of parkinsonism has been investigated by means of surface electromyography. Grouped electromyogram, characteristic of parkinsonism shaking was found to be generated on the basis of double, triple discharges of the motor unit (doublets and triplets), or long-term synchronization of motor units discharges as well as by means of simultaneous recruitment of both above mechanisms. Stationary electromyogram, characteristic of akinetic-rigid form, was shown to correlate with asynchronous, stable activity of the motor units that impulse at the frequencies 9-10 Hz.

[A comparative neurophysiological analysis of thermoregulatory muscle activity in hibernating and nonhibernating animals during the development of hypothermia].

Comparative neurophysiological analysis of the motor units (MU) activity during hypothermia performed in ground-squirrels and rats, revealed a tendency of the MU firing rate to decrease whereas electromyographical patterns of thermoregulatory activity were found to be common both for hibernating and non-hibernating animals. The MU activity ceased in rats at their body temperature of 20-22 degrees C in contrast to 9-5 degrees C in ground-squirrels. Differences in thermoregulatory muscle tone distribution over muscle groups were found between those two species.

[Body size and the thermoregulating activity of the motor units in mammals].

A reverse relationship between the rate of discharges and the body mass during thermoregulatory activity of motor units induced by general cooling, was shown in mammals with different body masses. The data obtained suggests a neurophysiological explanation of Heldmaier's bioenergetic rule.

[Interaction of thermoreceptive and vestibular signalling in regulating the activity of flexor and extensor motor nuclei during cold tremor].

The impulse activity of flexor and extensor gamma- and alpha-motoneurons was investigated in anesthetized cats during cold tremor. Total cooling, local cold stimulation of thermoreceptors or electrical stimulation of dorsomedial area of posterior hypothalamus were shown to evoke primary activation of flexor--and simultaneous inhibition of extensor gamma-motoneurons, with secondary activation of flexor alpha-motoneurons. Caloric stimulation of the vestibular receptors during cold tremor evokes primary inhibition of the activity of flexor alpha-motoneurons and secondary inhibition of flexor gamma-motoneurons as well as simultaneous activation of extensor gamma-motoneurons.