Does the endolymph pass through the base of the cupula?

Whether the endolymph of the semicircular canal passes the cupular partition or not was examined using the lateral semicircular canal system of adult pigeons (Columba livia). By applying various pressures by means of injection of a dye solution through the membranous canal, it was found that the dye...

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Bibliographic Details
Published in:Acta astronautica 2001-08, Vol.49 (3), p.365-369
Main Authors: Jijiwa, H., Watanabe, N., Hattori, T., Matuda, F., Hashiba, M., Mizuno, Y., Shindo, M., Watanabe, S.
Format: Article
Language:English
Subjects:
Animals
Biological membranes
Coloring Agents - pharmacokinetics
Columbidae - anatomy & histology
Columbidae - metabolism
Columbidae - physiology
Contrast Media - pharmacokinetics
Dyes
Endolymph - physiology
Evans Blue - pharmacokinetics
Iron - pharmacokinetics
Magnetics
Magnets
Oxides - pharmacokinetics
Permeability
Pressure
Pressure effects
Semicircular Canals - anatomy & histology
Semicircular Canals - metabolism
Semicircular Canals - physiology
Space life sciences
Vestibule, Labyrinth - anatomy & histology
Vestibule, Labyrinth - physiology
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Summary:Whether the endolymph of the semicircular canal passes the cupular partition or not was examined using the lateral semicircular canal system of adult pigeons (Columba livia). By applying various pressures by means of injection of a dye solution through the membranous canal, it was found that the dye solution was seen to pass the cupula even under very low pressures when the pressure was increased gradually. When pulled by a magnet, the ultrafine particles of the dextran magnetite contained in the injected fluid were found to pass through the subcupular space without evident increase of the ampullary pressure.
ISSN:0094-5765
1879-2030
DOI:10.1016/S0094-5765(01)00112-6