Sokulskyy I. Morphology of the thoracic spinal cord of vertebrates

The thesis is devoted to research of the spinal cord morphology of vertebrates. In the thoracic spinal cord of vertebrate animals the characteristic specific differences caused by the peculiarities of ecology and behavior of animals in the environment has been established. During the phylogeny and postnatal period of ontogenesis the spinal cord is restructuring, as evidenced by increased cross-cut area, a different ratio of brain gray matter to white populations of nerve cells in the gray matter. Researches of the spinal cord of carp, frogs and lizards - animals that are almost of the same level of phylogenetic development (frogs and lizards), and differing physical activity, revealed some differences of histological cytological structures of the body structure. They are determined by the ratio of brain gray matter to white matter, different populations of neurons of the spinal cord, their size, shape, density accommodation of neurocytes, quantitative redistribution of different types of neurons and histochemical indicator reactions to detect nucleic acid and protein compounds. Analysis of histoarchitectonics of the spinal cord gray matter in domestic animals (chickens, rabbits, dogs, pigs, cattle) is characterized by complicated morphological organization of neurons, which results in increasing of their size, increasing the number of large multi-polar neurons, complication of branching sprouts, etc. Designed by us study complex of research of histological cytological structures of spinal cord in vertebrates, their comparative performance in the phylogeny and postnatal ontogenesis, identified structural features of spinal cord tissue and cellular levels.