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Biomedical subjects

E A Antonova

Publications and source records attributed to E A Antonova.

6 recordsLinked to original sources
PubMed1986

[Ultrastructural characteristics of branch sphincters and precortical arteries in the rabbit pial arterial system].

Structural peculiarities of pial arteries and their active microvascular segments-sphincters in offshoots and precortical arteries have been investigated, using electron and light microscopy. Our studies have revealed that these vascular segments, which can independently change their lumen, possess multiple myoendothelial junctions, as well as neuro-muscular contacts. This gives evidence of their independent responses that might be determined by structural peculiarities and innervation of their walls.

Animals↗
PubMed1984

[Structural and functional characteristics of arteries and veins in the common frog].

Histochemical, electron-microscopic, pharmacological and physiological studies of structural and functional features of the frog blood vessels revealed a difference in the peripheral neural apparata of different vessels as expressed by different grades of the contractile responses to exogenous substances and electrical stimulation: the better innervated a vessel the better response is mediated by the alpha-adrenoreceptors. The beta-adrenoreceptors have only been found in innervated vessels. The data obtained suggest that vessels of amphibia are in general similar to vessels of vertebrates but the species specifics associated with behaviour and environment of animals determine a number of specific features in structural-functional organization of vessels. The diversity of structure and functioning of blood vessels found in amphibia attests a differentiation of mechanisms of vessel regulation in different areas of the vascular bed.

Acetylcholine↗
PubMed1982

[Trophic function of vascular nerves].

Ultrastructural study of the rabbit central ear artery in different periods after unilateral sympathectomy (from 2 days to 9 months) revealed that the sympathetic denervation led to obvious destructive changes in cells of all layers of the vascular wall. The earliest degenerative changes occurred in the endothelial cells, then--in the muscular sheath. The changes involve alterations of mitochondria in the endop0lasimic reticulum, destruction of contractile apparatus in the myocytes, and complete disintegration of some smooth muscle cells. After regeneration of the sympathetic nerves, a gradual restitution of the structure of vascular wall's elements occurs.

Animals↗