[Morphological and cytochemical analysis of neuronal populations in the ganglion cell layer of the cerebellar cortex in birds and mammals living in similar habitats].

Neuron populations of ganglion cell layer of cerebellar cortex were studied in birds and mammals, which were living in similar habitats: air-land habitat (squirrel--Sciurus vulgaris and sparrow--Passer domesticus) and land-water habitat (nutria--Myocastor coypus and goose--Anser domesticus). The following morpho-cytochemical indices were analyzed: density of Purkinje cell distribution per unit gyms length, area parameters, tinctorial properties, protein content of neuron populations of ganglion cell layer. Evaluation of neuronal tinctorial properties has revealed general consistent patterns in the organization of cerebellar ganglion cell layer in vertebrates, while an analysis of protein metabolism has demonstrated specific features characteristic for definite classes irrespective of their habitat.

[Comparative morphological analysis of neuron populations in ganglion layer of rodent cerebellar cortex].

The characteristics of basophilic substance distribution, linear dimensions and Purkinje cell (PC) density per unit of gyrus length in ganglion cell layer of cerebellar cortex were studied in ecological-morphological groups of small burrow rodents. Polymorphism specificity of neuron populations in ganglion cell layer was demonstrated in regard to degree of chromophilia of neuron cytoplasm which is characterized by obvious prevalence of normo- and hyperchromatic cells in all PC populations. The correlation between average values of PC body profile area, density of neurons distribution in cell population and the degree of animal adaptation to their environment was analyzed.

[Morphometric analysis of the motor analyzer structures in albino and gray rats].

Cellular content of neuron populations of cortex, subcortical structures of brain and cerebellum and nuclei of anterior horns of cervical region of the spinal cord was studied in albino and grey rats. The revealed distinctive features of the tinctorial properties and sizes of neurons of different structures of the motor analyser are explained as an adaptation peculiarities of the animal brain organization. Heterogeneity of neuron population at different levels of the brain motor system indicates the different adaptation mechanisms of albino and grey rats.