[Structural organization and connections of cell ensembles of the olfactory bulb of the cat brain]. / Strukturnaia organizatsiia i sviazi kletochnykh ansamblei oboniatel'nogo bugorka mozga koshki.

The cat cerebral olfactory tubercle (OT) includes into its composition certain cellular ensembles distinguished by means of morphological criteria. The ensembles consist of three cellular components: clusters of granular neurons (islands of Calleja), pyramid-like neurons of the layer II, situating along the periphery of the islands, and groupings made by polygonal and spindle-like neurons of the layer III. Morphometrical analysis of every of the three cellular complex components has been carried out. About 7-10 islands of Calleja are situated on the OT territory, which makes nearly 75% of the whole surface of the OT. Neuronal composition of the cellular ensembles has been studied by Golgi method. Varieties of long and short axonal neurons, included into the ensemble composition, have been characterized. Presence of projections of the macrocellular neurons of the layer III (a part of the third component of the ensemble) has been revealed in the posterior part of the lateral hypothalamus and in the field of Forel H1. Possible role of the cellular ensembles is discussed for ensuring various functions of the OT.

[Features of the cytoarchitectonics of the periaqueductal gray of the cat midbrain]. / Osobennosti tsitoarkhitektoniki okolovodoprovodnogo serogo veshchestva srednego mozga koshki.

When studying cytoarchitectonics of the midbrain periaqueductal gray (PAG) in cat four areas were distinguished: medial, dorsal, lateral rostral and lateral caudal. They differ in size and distribution density of neurons.

[Quantitative analysis of the structure of neuronal dendritic spines in the striatum using the Leitz-ASM system]. / Kolichestvennyi analiz struktury dendritnykh vetvlenii neironov striatuma s pomoshch'iu sistemy "Leitts-ASM".

Two principal classes of striatum long axonal neurons (sparsely ramified reticular cells and densely ramified dendritic cells) were analyzed quantitatively in four animal species: hedgehog, rabbit, dog and monkey. The cross section area, total dendritic length and the area of dendritic field were measured using "LEITZ-ASM" system. Classes of neurons studied were significantly different in dogs and monkeys, while no differences were noted between hedgehog and rabbit. Reticular neurons of different species varied much more than dendritic ones. Quantitative analysis has revealed the progressive increase in the complexity of dendritic tree in mammals from rabbit to monkey.

[Analysis of the neuronal dendrite system of the olfactory bulb in the dog brain]. / Analiz dendritnoi sistemy neironov oboniatel'nogo bugorka mozga sobaki.

A technique was worked out for quantitative analysis of accurate neuron drawings obtained from the preparations impregnated after Golgi. The analysis (according to 13 parameters) was performed to study the dendritic system within one main class of long-axonal neurons in layer II in areas having heterogenous structures of the polyfunctional formation in the dog cerebral olfactory tubercle. The most stable parameters were demonstrated to be the linear dimension of the cell body, branching of the apical and basal dendritic systems, as well as branching of the whole neuronal dendritic system. Values of other parameters change with statistical significance depending on the fact to what areas with heterogenous structures of the olfactory tubercle the neurons belong. The data obtained demonstrate a greater pyramidization of the neural class studied in the rostral portion and their similarity in the median and caudal portions of the olfactory tubercle and the neurons of highly differentiated subcortical nuclei.

[The sterologic method of determining the surface area of the mammalian neocortex]. / O stereologicheskom metode opredeleniia ploshchadi poverkhnosti neokorteksa mlekopitaiushchikh

A method for calculation of the square surface area of the cerebral cortex is proposed which represents a combination of the method of averaged reconstruction after a continuous series of histological sections and the stereological method of determination of the length of any curve disposed on the surface. A comparative analysis of the proposed method with curvometrical and stereological (after Hennig's formula) method used earlier for this purpose is made taking as an example the calculation of the neocortex square surface area of some mammals. The results of calculation of the surface by the proposed method were found to coincide with curvometrical data within the range of 5% while the data obtained by stereological method of determination of the absolute square surface area differ from curvometrical data by more than 22%. The proposed method is very convenient and allows considerable acceleration in obtaining results.