Development of the functionally different ganglia of the human peripheral nervous system during ontogenesis
Sluka, B.A.
Arkhiv Anatomii Gistologii i Embriologii 84(4): 18-26
1983
ISSN/ISBN: 0004-1947 PMID: 6870555 Document Number: 200539
Development of the vagus nerve inferior ganglion, the superior cervical ganglion and the intraorganic ganglia of the respiratory tube (the larynx and lungs) has been studied histologically, histochemically and morphometrically and morphometrically in 52 human embryos and fetuses beginning from the 6th month of embryogenesis up to birth. The main successive changes of differentiating neurocytes are described and heterochronic beginning of differentiation of the sensitive, sympathetic and parasympathetic neural ganglia are demonstrated. A sharp decrease in distribution density of the neural cells during the growth and maturation phase and stabilization of their density during the mature stage are noted. The dynamics of the nuclear-cytoplasmic relations in neurocytes during the prenatal ontogenesis is presented. The neuronal differentiation is considered in connection with the hierarchic setting off the vascular and neural types of the ganglionar trophism during ontogenesis.