Ultrastructure of Vestibular Vasculature

概要

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The vascular corrosion casts of the Vestibule were studied under the scanning electron microscope to define the three dementional ultrastructure of Capillary areas of the membranous vestibular labyrinth. Twelve guinea pigs, two rabbits, and a man were irrigated through ascending aorta with a mixture of PH-A solution and clot disperser in physiological salt solution, and methacrylate resin of low viscosity (Mercox) was used to obtain vascular corrosion casts. Although the dense capillary networks were observed in every maculae and cristae, no new findings were added to the previous knowledge by the present SEM studies, as these networks show most of two dimentional construction. In the guinea pigs, however, SEM revealed characteristic coiling and twisting pattern just before vestilular arterioles enter the capillary networks beneath the sensory epithelium. These coiling structures were morphologically similar to those of the glomerulus, and the arterioles decreased in their diameters after several ramifications in this area. Although it is not obvious whether this coiling arteriole system is found in other animals vestibule, this system many play a specific role in the microcirculation of the inner ear.
日本耳科学会の論文