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pp.516-523
Published Date 1950/12/20
DOI https://doi.org/10.11477/mf.1492200436

 With an aid of special apparatus designed for the purpose, Sakamoto succeeds in measuring the inner ear pressure in relation to that of the cerebro-spinal fluid and also, in establishment of volumetric changes in the crebral vessels as well as capillary permeabilty thereof. The results are: (1) When pressure is applied to the abdomen or adrenalin injection is instituted to elicit volumetric changes in the cerebral vessels, the inner ear pressure, on the side upon which such measures be taken, would show a definite lagging in the downward curve of the graph, that represent the fall of pressure, as compared to that of the cerebro-spinal fluid.

 (2) When a vasoconstricting agent is injected to decrease capillary permeability, both pressures, the inner ear and the cerebro-spinal fluid assume the rise but, in neither ear is elicited a lagging which was shown so definitely clear by Hughson A. Crowe and his associates.

 (3) In the course of reactions which followed injection of adrenalin solution, a phenomenon is observed in the manometric reading on the labyrinth, the so.called Szasz's torpid point-erstarrung. But, to make an interpretation of this phenomenon directly as a manifectation of changes in the blood vessels of the inner ear, according to that author, leaves some ground for doubt.

 Basing upon results of the experiment together with other fats which have been correlated in the literature, the author attempts to evaluate the role of cerebro-spinal fluid pressure and the inner ear blood vessels in contribution to establishment of the inner ear pressure. And, concludes that changes that might occur in the pressure of cerebro-spinal fluid which would be further modified by actions of vascular mechanism within the vessels of the inner ear are causes that influence directly the pressure changes that occur in the inner ear.


Copyright © 1950, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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