ОСОБЛИВОСТІ ГІСТОМОРФОЛОГІЇ ТА ГІСТОХІМІЇ ГРУДНИХ І ШИЙНИХ ВІДДІЛІВ СПИННОГО МОЗКУ ДОМАШНЬОЇ КУРКИ
The paper provides the peculiarities of morphofunctional and morphometric characteristics in thoracic and cervical parts of spinal cord in chicken. The abovementioned quantitative characteristics of neural structure are presented in grey matter of spinal cord in chicken. The results and their comparing with data indicates that nerve groups of cells with the identical functional meanings form the nucleus of grey matter in spinal cord. Such nuclei where selected -in Dorsal horns: nucleus of dorsal horn, Clark’s nucleus, - in Lateral horns: lateral and medium intermediate nuclei, -in Ventral horns: lateral, central and medial nucleus. The nuclei allocated in the parts of cord have the difference among a great number of neurons, their size and shape of perikarions. Thus, the equal location of nuclear chromatin in nucleus of nerve cells and the enlightment of cytoplasm in neuron of cervical part of ventral horns shows the functional motoneuron activity possibly due to the innervation of the thoracic limbs in chicken. It has been investigated that the presence of grey matter in thoracic and cervical parts of spinal cord is heterogenic by percentage and is characterized by availability of large, medium and small nerve cells appropriately. Also, the article presents a localization and division of nucleic acid and protein compound in histostructure of spinal cord on the tissue and cell levels.