[EEG spatial characteristics after intense exercises]. / Prostranstvennye kharakteristiki EEG posle intensivnoi fizicheskoi nagruzki.

Subjects performed intense exercises in a teadbahn under conditions of high ambient temperature and humidity. Spatial characteristics of the EEG were estimated. The information value of the time course of the combined index, characteristics of spatial synchronization and entropy of cortical biopotentials as a test for brain reaction to a load and recovery of its functional state was shown. The significance of non-linear relations between brain potentials in the activation of the adaptive and compensation processes was mentioned.

[Multiple parameter comparative EEG analysis in alcoholism and narcotic dependence]. / Mnogoparametricheskii sravnitel'nyi analiz EEG pri alkogolizme i narkomanii.

Multiparametric comparative analysis of spatial organization of EEG was carried out in 137 alcoholics and 131 heroin addicts. Common and different deviations from normal EEG (105 control subjects) were found. Global alterations of EEG spatial organization were observed in drug addicts (as compared to alcoholics). Such changes characterized increasing synchronizing effects of mesolimbic and brainstem structures on the brain cortex. The ethanol effects were more specific and asymmetric. Changes in EEG spectral-coherence characteristics were revealed in all frequency band, however, maximal changes took place in the high-frequency theta in drug addicts and in narrow-frequency alpha subranges in alcoholics. Different effects on the high-frequency EEG component (19.00-21.25 Hz) and information-energy index (coherence-to-spectral power ratio) suggest the difference influence of ethanol and heroin on emotional-motivational and cognitive processes as well as the level of consciousness. The obtained data on EEG discrimination of alcoholism and drug addiction (the inverse problem solution) on the basis of "specific" EEG patterns appear to have considerable promise in development of systems of occupational selection.

[Dynamics of EEG-indicators in alcohol abstinence]. / Dinamika EEG-pokazatelei pri alkogol'nom abstinentnom sostoianii.

To study the possibility of discrimination of different periods of alcohol abstinence state (acute, subacute, and arrested) the brain electrical activity of 30 patients with chronic alcoholism was recorded from 24 sites of convexital scalp surface during the detoxication. The "Synchro-EEG" program package was applied for EEG processing using 840 parameters. Sets of state-specific characters were selected, and an integral parameter for estimation of the brain functional state was developed. Parameters of coherence of biopotentials in narrow frequency subbands turned to be of the greatest informative value. As compared to the normal state, in the acute period all the frequency components were changed. Their dynamics during detoxication was different. Delta and theta activity were normalized faster then the alpha and beta frequencies. The dynamics of the spatial synchronization foci reflected the recovery of consciousness and normalization of the brain functional state.

[Experimental study of the emotionality of drama school students]. / Eksperimental'noe issledovanie émotsional'nosti studentov teatral'nogo vuza.

The students making a good progress in studying the principles of actor's profession can learn rather easily to control at will the vegetative skin-galvanic reaction by means of mentally conceiving emotionally coloured situations and by means of visual feedback. This group of subjects is characterised by an emotiogenous increase of the heart rate of moderate absolute value and by Taylor's level of alarm which does not overstep the average statistic norm. The professional progress of students does not correlate with Eysenk index of emotional lability.

[Characteristics of human external respiration under excess intrapulmonary pressure under sea level and "altitude" conditions according to pneumotachographic data]. / Osobennosti vneshnego dykhaniia cheloveka pri izbytochnom vnutrilegochnom davlenii v nazemnykh i "vysotnykh" usloviiakh po dannym pnevmotakhografii.

In 54 pressure chamber experiments 12 healthy male test subjects took part. Their pneumotachograms and other physiological parameters at a positive pressure breathing of 30 mm Hg at sea level and of 125--130 mm Hg at an altitude of 25,000 m at rest and while exercising were recorded. High altitude facilities and pneumotachograph were modified to meet the experimental requirements. The changes in pneumotachographic readings depended on the excess intrapulmonary pressure, its variations with respect to the respiratory stages, efficiency of the external counterpressure on the body, as well as motor activity of the test subjects. The pneumotachographic procedure allows qualitative and quantitative evaluations of external respiration upon excess intrapulmonary pressure, and study of the mechanism of these changes supported by other physiological methods.

[Prevention of altitude decompression sickness during short flights in a depressurized cabin at high altitudes]. / Preduprezhdenie vysotnoi dekompressionnoi bolezni v usloviiakh neprodolzhitel'nykh poletov v razgermetizirovannoi kabine na bol'shikh vysotakh

Forty altitude chamber experiments were carried out in which 18 test subjects participated. The purpose of the experiments was to prevent decompression sickness in a pilot using an altitude compensatory suit and oxygen mask. It was demonstrated that oxygen breathing on the ground and at an altitude of 8 km for 20 and 50-60 min eliminated severe symptoms and lowered the frequency of occurrence of mild symptoms of decompression sickness during the subsequent 10-20 and 60-120 min exposures to altitudes of 40,000 and 11,000 m respectively. An increase in the absolute pressure to 240-290 mm Hg in the altitude garment prevented decompression sickness of altitudes of 11,000-15,000 m and eliminated it if it occurred at lower barometric pressure.

[Prevention of decompression sickness as applied to conditions of multiple space walks]. / Profilaktika dekompressionnoi bolezni primenitel'no k usloviiam mnogokratnykh vykhodov v kosmos

Six 3-day experiments were carried out in an altitude chamber in which 6 test subjects took part. The experiments simulated repeated extra-vehicular activities--intensive work at an altitude of 10,000 m in a helmet or at an altitude of 40,000 m on a space suit pressurized at 200 mm Hg. It was demonstrated that altitude decompression could be prevented by desaturation--prolonged exposure to the hypobaric atmosphere (430 mm Hg) and 100% O2 or a 40% O2 and 60% N2 mixture. During the 3-day experiment the test subjects made seven 3--4 hour excursions, showing no symptoms of decompression disease.

[Hypobaric nitrogen-oxygen atmosphere as a method of preventing altitude decompression sickness]. / Gipobaricheskaia azotno-kislorodnaia atmosfera kak sposob preduprezhdeniia vysotonoi dekompressionnoi bolezni

It has been shown experimentally that the development of altitude decompression disease at 250 and 180 mm Hg can be prevented by preliminary desaturation in the nitrogen-oxygen hypobaric atmosphere (60% N2 and 40% O2 at 550 mm Hg). This has been demonstrated in 38 experiments on 21 test subjects. The use of this atmosphere in space cabin prevents the development of decompression disease upon a decrease of the cabin pressure to 250 mm Hg and upon extravehicular activity in a space suit with 180--200 mm Hg.

[Blood acid-base equilibrium during breathing of hypercapnic gas mixtures]. / Kislotno-shchelochnoe sostoianie krovi pri dykhanii giperkapnicheskimi gazovymi smesiami.

By the method of Astrup-Zigaard-Andersen the acid-base balance in the blood of men and dogs exposed to hypercapnic atmospheres with a normal, increased and decreased oxygen content was investigated in 164 experiments. Variations in the acid-base equilibrium were compared with changes of physiological functions. The relationship between the acid-base balance and the carbon dioxide concentration as well as the oxygen concentration in the breathing air was established. The toxic effects of sharp hypercapnia and hyperoxia were shown to cumulate. The positive effect of moderate hypercapnia on the tolerance to normobaric hypoxia in long-term experiments was noted.