[Moprphometric indices of human cardiac neurons during postnatal ontogenesis]

Certain regularities in changes of the cytoplasm volumes of the cardiac neurocytes, their nuclei, nucleoli as well as nuclear-nucleolar relations were determined in humans (from nerborns to 90 years of age) in developmental aspects by the morphometrical analysis. All the neuron structural components under study have been shown to increase with age. This increase is satisfactorily expressed by a cubic parabola. A periodical increase in the intensity of gorwth of these characteristics has been shown in certain developmental periods according to physiological peculiarities of the organism and the cardio-vascular system which take place in postnatal ontogenesis. The established morphological data show specific features of differentiation, maturation and aging of cardiac neurocytes in humans.