[Cumulated biological effects of microwaves and their reflection in behavior, work capacity, growth of body mass and state of brain neurons]. / Kumuliatsiia biologicheskikh éffektov mikrovoln i ee otrazhenie v povedenii, rabotosposobnosti, priroste massy tela i sostoianii neironov golovnogo mozga.

Albino rats were exposed to 2375 mHz microwaves of 500 microW/cm2 for 169 h. At the time of exposure, the body mass growth diminished, the efficiency and vertical motor activity decreased in exposed animals in comparison with the controls. Three types of radiation-induced damages were found in the brain: chromatolysis, pyknosis, and ischemia. Different brain parts displayed different sensitivity depending on their location in relation to transverse sutures of the skull.

[Cyclic interactions in the processes of adaptation regulation]. / Tsiklicheskie vzaimodeistviia v protsessakh adaptivnogo reguli- rovaniia.

Human adaptation is characterised by essential changes of functional systems biorhythms which appears in the changes of their components' sequence and in the dynamics of biorhythmological cycles. These objective laws, having been described for human EEG, allow to discern clearly the individual-typological peculiarities in man with different stages of adaptation, the same as the adaptive shifts during long-term influence of external factors. The cyclic course of adaptative processes is regarded as a measure of adaptability. With the help of biorhythmic multitude the memory is constantly satiated from the brain by discrete portions of adaptogenic information, which prevents the natural processes of the memory disintegration.

[Individual characteristics of the behavior, learning and adaptation of rats exposed to extreme conditions]. / Individual'nye osobennosti povedeniia, obucheniia i adaptatsii krys k ékstremal'nym vozdeistviiam.

Techniques of open field, instrumental food conditioning and acute hypoxic hypoxia were used in experiments on white rats which had been divided into three groups: low--(I), middle--(II) and high-entropy (III). The III group rats were characterized by high motor activity, various postures and states which seemed to account for fast instrumental conditioning of these rats. Rats of the II and III groups (67% of all the rats) proved most resistant against hypoxia and therefore more adaptable to extreme factors.

[Interaction of brain structures regulating the vocal and respiratory systems]. / Vzaimodeistvie struktur golovnogo mozga reguliruiushchikh vokal'nye i respiratornye sistemy.

Unit activity data revealed an obvious interrelationship between the brain vocal and respiratory systems. Modification of evoked reaction of the vocal system depends on stimulated central nuclei and parameters of stimulating electric current. The threshold of evoked vocal reaction is higher than the threshold sufficient for modification of respiration and neuronal activity. The data obtained suggest that not all the structures related to the respiratory regulation bear control over the generation of species specific cries.

[Analysis of species specific acoustic signals in the mesencephalic, diencephalic, and neostriatal structures of the brain]. / Analiz vidospetsificheskikh zvukovykh signalov v mezentsefalicheskikh, diéntsefalicheskikh i v neostriarnykh strukturakh golovnogo mozga.

In chronic experiments, the neuronal activity in structures of the auditory analyzer was studied during perception of species-specific signals in the chicken. The majority of the neostriatum cells responded to territorial vocalizations of the rooster and to squeaking of the chicken; in the midbrain structures the maximal responses occurred to signals of distress and alarm. The greatest number of cells responded most obviously to the cardinal component of the chicken vocalization spectrum.

[Reactions of the neurons of midbrain and diencephalic structures during perception of acoustic signals and induced vocalization]. / Reaktsii neironov struktur srednego i mezhutochnogo mozga pri vospriiatii zvukovykh signalov i vyzvannoi vokalizatsii.

75% of the chick mesencephalic and diencephalic neurons changed their activity both on perception of acoustic stimuli (noise, frequencu-modulated tone, ecological stimuli) and at the emission of sound. The data obtained suggest that structures of the chick mesencephalon and diencephalon are involved in vocal reactions and have sound-sensitive neurons processing the acoustic information. The diencephalic neurons were found to have a higher specificity as compared with the mesencephalic cells.

[Reactions of neurons of the hippocampus and caudal neostraitum to conditioned stimuli of different ecological signficance to birds]. / Reaktsii neironov gippokampa i kaudal'nogo neostriatuma na uslovnye razdrazhiteli raznoi ékologicheskoi znachimosti u ptits

Neuronal activity of the hippocampus and the caudal neostriatum was studied in chronic experiments on hens (Gallus domesticus) under the action of conditioned acoustic stimuli of different ecological significance. Units which selectively respond to ecologically adequate stimuli were found in the above structures. An active enhancement of filtrating properties of neuronal nets was revealed in the hippocampus; as a result the hippocampal units predominantly pick out the specific information present in the ecologically adequate stimuli.