Document Detail

Cupular response and functional anatomy to pressure application in the pigeon.
MedLine Citation:
PMID:  12101368     Owner:  NASA     Status:  MEDLINE    
In this study, horizontal semicircular canal of the pigeon was inserted with a microfill, 164 micrometers in outer diameter, to gauge the pressure change in the canal and to clarify two things. One is whether the endolymph passes through the crista ampullaris or not. The other is as to the space where the endolymph passes through in the crista ampullaris if the endolymph goes through the crista. The pressure applications were performed by using Evans blue solution and as a result three pressure groups, i.e., 1) high, 2) moderate and 3) low were discriminated. Our results suggest that the endolymphatic fluid passes through the subcupular space or the top of the crista ampullaris when the pressure is enough small like the head rotates in daily life. Accordingly we present a new hypothesis as to the functional anatomy of the cupula in contrast to current hypotheses e.g. drum membrane or revolving door.
N Watanabe; H Jijiwa; Y Mizuno; K Helling; T Hattori; F Matsuda; M Shindo; Y Mizuno; M Hashiba; S Murakami; H Scherer; S Watanabe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Uchū Seibutsu Kagaku     Volume:  15     ISSN:  0914-9201     ISO Abbreviation:  Biol. Sci. Space     Publication Date:  2001 Dec 
Date Detail:
Created Date:  2002-07-08     Completed Date:  2002-09-27     Revised Date:  2009-06-04    
Medline Journal Info:
Nlm Unique ID:  100972048     Medline TA:  Biol Sci Space     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  409-13     Citation Subset:  S    
Department of Otolaryngology, Medical School, Nagoya City University, Nagoya, Japan.
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MeSH Terms
Endolymph / physiology*
Semicircular Canals / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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