Self-Similar Growth of Bose Stars.

We analytically solve the problem of Bose star growth in the bath of gravitationally interacting particles. We find that after nucleation of this object, the bath is described by a self-similar solution of the kinetic equation. Together with the conservation laws, this fixes mass evolution of the Bose star. Our theory explains, in particular, the slowdown of the star growth at a certain "core-halo" mass, but also predicts formation of heavier and lighter objects in magistral dark matter models. The developed "adiabatic" approach to self-similarity may be of interest for kinetic theory in general.

Artificial radio lighting with sources of microwave dynamic chaos.

Application of dynamic chaos for the illumination of the surrounding space by artificial incoherent sources of microwave radiation with the purpose of its subsequent observation using special receiving equipment is considered. An incoherent broadband microwave radiation field is provided by "radio light lamps" based on dynamic chaos generators. The radio light is received with specially designed sensitive elements that combine the properties of an envelope detector in communication systems and a radiometer. It is shown that with the help of directional antennas connected to these sensitive elements, it is possible to create receivers with spatial resolution for visualizing a part of the surrounding space in artificial radio light. Radio light images of a room have been obtained. The possibility to detect changes associated with the emergence of new objects on these images is demonstrated.

[Clinical and neurochemical features of depressive syndrome in neuroses and slowly progressive schizophrenia]. / Klinicheskie i neirokhimicheskie osobennosti depressivnogo sindroma pri nevrozakh i maloprogredientnoi shizofrenii.

The examination was made of 78 patients (57 women, 21 men) with depression of neurotic level in slow progredient neurosis-like schizophrenia or neurosis. In all the cases of neuroses depressive syndrome correlated with relevant premorbid structure of the person. Meanwhile, such correlation was not clearly observed in schizophrenic patients. Complication of the clinical picture of the depression wasn't the same in cases of schizophrenia and neuroses, and resulted from productive symptomatics of different registers. The results of neurochemical studies evidence, that physiologic inactivation of serotonin, in terms of a removal of the active molecules from a zone of interaction with the receptors, was considerably increased in patients with neuroses as compared with schizophrenic patients. This suggests treatment of neurotic patients with the drugs, which inhibit serotonin reuptake selectively.

[Forensic psychiatric expertise in brain tumors]. / Sudebno-psikhiatricheskaia ékspertiza pri opukholiakh golovnogo mozga.

The patients with brain tumors are quite rare in forensic-psychiatric practice. The authors observed only 21 cases during 25 years (that is 0.05% from all the persons subjected to the forensic-psychiatric examination). The tumors were revealed in 11 patients during examination; 10 patients underwent forensic-psychiatric examination after operation for brain tumor. There were different mental disturbances of various degree in such patients: disorders of memory, emotional instability, impulsivity, disorders of consciousness, phenomena typical for epileptiform syndrome, and other disorders. 16 patients were characterised as irresponsible ones. The supervision of neurologist and psychiatrist was recommended in all cases.

Information processing using dynamical chaos: neural networks implementation.

In this work, we study information processing applications of complex dynamics and chaos in neural networks. We discuss mathematical models based on piecewise-linear maps which enable us to realize the basic functions of information processing using complex dynamics and chaos. Realizations of these models using recurrent neural-like systems are presented.

[The role of glucocorticoids in the post-vibration changes in inhibition mediation in the brain structures]. / Rol' gliukokortikoidov v postvibratsionnykh sdvigakh tormoznoi mediatsii v strukturakh golovnogo mozga.

Low-frequency vertical vibration for 2 hours together with three-fold increase of glucocorticoids is accompanied by the disruption of typical relationships of neuromediator processes (norepinephrine- and serotoninergic mediation) as well as the reduction of the intensity of choline trapping with glucocorticoid perception. Glucocorticoid-related conformation changes in plasma membranes and a drastic increase of the cAMP level provide plasticity of both nonspecific (hypothalamus, raphe bluish sites and nuclei) and specific (Deiters' nuclei) structures. The relationships of neuromediator processes in different CNS structures depend on the content of glucocorticoids. This should be taken into consideration when developing pathogenetically adequate methods for restoring the vestibular component of the motion sickness syndrome.

[Clinico-diagnostic criteria of protracted anxiety-related depression in manic-depressive psychosis and attacks of schizophrenia]. / Kliniko-diagnosticheskie kriterii zatiazhnykh trevozhnykh depresii pri maniaka'lno-depressivnom psikhoze i pristupoobrazno protekaiushchei shizofrenii.

The study of premorbid period and factors capable of provocking the disease enabled the author to give the comparative clinical and psychopathological characterization of formation and course of prolonged anxious depressions in the framework of circular psychosis vs. schizophrenia. The predictors of these diseases prolongation are described. The present work allowed us to perform a differentiated approach to treatment of prolonged anxious depressions in patients with different disorders.

[Effect of low-frequency whole-body vertical vibration on the serotoninergic system of the brain and spinal cord]. / Vliianie nizkochastotnoi obshchei vertikal'noi vibratsii na serotoninergicheskuiu sistemu golovnogo i spinnogo mozga.

Rat experiments were performed to study variations in serotonin (5-HT) and its metabolite (5-hydroxy indole acetic acid) in different CNS compartments. Control animals were exposed to an acute vibration stress (10 Hz, 1 mm, 2 m/sec2, 15 min) and experimental animals to a prolonged (52-54 days) vibration test. Acute vibration led to 5-HT activation which was most significant in the hippocampus, diencephalon, cerebellum and in the sacrolumbar cord. Prolonged vibration caused an increase of 5-HT in the parietal cortex and its enhanced utilization in the striatum, diencephalon, pons and in the sacrolumbar cord. As compared to the controls, vibration produced a smaller accumulation of 5-HT in the hippocampus and a larger accumulation in the cerebellum, diencephalon, medulla oblongata and spinal cord. The paper discusses the role of regional changes in 5-HT metabolism and reactivity of serotoninergic structures in the mechanism of vibration-related somatosensory disorders.

[Electric reactive potentials to events with a positive and negative coloring in patients with protracted depression]. / Elektricheskie reaktivnye potentsialy na sobytiia, imeiushchie polozhitel'nuiu i otritsatel'nuiu émotsional'nuiu okrasku, u bol'nykh s zatiazhnoi depressiei.

The authors measured electrical reactive potentials in the posterior associative and frontal areas, originating in response to winning or losing of the serve in tennis game shown on the video which served as a model of positive and negative emotional reactions. The studied potentials consisted of four waves: P300, N600, P800 and N1000. Healthy subjects experiencing positive emotions showed a more marked negative nature of the potentials in the left posterior associative zone while negative emotions were associated with the presence of predominantly negative potentials in the right frontal area. Patients with protracted depression presented a negative shift of potentials in both right posterior associative zone and left frontal area. The results obtained indicate that protracted depression is attended by impaired topography of the cortical processes associated with positive and negative emotions.

[Comparative physiology of short-interval conditioned reflexes to time in different species of animals]. / K sravnitel'noi fiziologii korotkointerval'nykh uslovnykh refleksov na vremia u zhivotnykh raznykh vidov.

Conditioned reflexes (CR) to short time intervals (from 0.25 to 20 min) were studied in rabbits, white rats and pigeons by motor food-procuring method. Some significant distinctions between species were revealed. The mean duration of formation of CR to time in rabbits amounted to 74 pairings, in rats--to 121, in pigeons--to 217. The optimal time interval varied in rabbits from 2 to 10 min, in rats from 1 to 4 min and in pigeons in was from 1 to 1,5 min. The longest interval which allowed to form the trace CR to time was not in excess of 22 min in rabbits, 10 min in rats and 4-5 min in pigeons. The shortest interval was within 15-45 s. Unstable and incorrect CR to time was formed when the intervals were shorter or longer than the optimal one. The accuracy of CR to time was: in rabbits approximately equal to 0.93-0.95 in rats approximately equal to 0.85-0.94, in pigeons approximately equal to 0.78-0.85. The data obtained have satisfactory explanation in the light of I. P. Pavlov's hypothesis on physiological mechanism of CR to time.

[Conditioned reflexes to the ratio of time intervals]. / Uslovnye refleksy na otnoshenie vremennykh intervalov.

Conditioned reflexes to relation of temporal intervals, as a specific variety of reflexes to stimuli ratios, were studied in rats during alternation of two homogeneous trace stimuli with their separate reinforcement; the stimuli were addressed to one analyser, but were of different duration. Formation of conditioned reflexes to the ratio of temporal intervals began in rats after eleven sessions (106 pairings) on the average. The total duration of the whole process of formation up to stabilization of the reflex varied from 20 to 40 sessions (31 on the average), or from 200 to 394 pairings (308 on the average). The process of formation was the longer the less the ratio between the compared intervals (of a longer to a shorter one). The precision of the formed conditioned reflex to the ratio of temporal intervals (as expressed in the probability of correct reactions) amounted to 0.71% on the average. The experimental data may be satisfactorily explained in the light of concepts of Pavlovian school on the physiological mechanism of conditioned reflexes to stimuli ratios.

[Limits to formation of trace conditioned reflexes to time]. / O predelakh obrazovaniia sledovykh uslovnykh refleksov na vremia.

Conditioned reflexes to different time intervals (from 0.25 to 90 min) were elaborated in Wistar line rats by motor food-procuring method. A conditioned reflex to time is formed easier and attains highest precision to intervals from 1 to 4 min. With shorter (0.5 to 0.75 min) and longer (6 to 10 min) intervals, the reflex to time is unstable and not precise. To intervals beyond the 0.5 to 10 min range the conditioned reflex to time could not be formed by the above method. Experimental data are corroborated by theoretical estimations of the shortest and longest intervals to which it is possible to elaborate a conditioned reflex to time by trace reflex mechanism. The data obtained are considered as a confirmation of Pavlov's hypothesis on the physiological mechanisms of the process of formation of a short-interval conditioned reflex to time.