Changes of endolymphatic pressure in the semicircular canal of pigeon by caloric stimulation

Details Changes of endolymphatic pressure in the semicircular canal of pigeon by caloric stimulation Changes of endolymphatic pressure in the semicircular canal of pigeon by caloric stimulation

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..385w&link_type=abstract

Advances in Space Research, Volume 14, Issue 8, p. 385-388.

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Scientific paper

It gets into difficult to explain the mechanism of caloric nystagmus only by convection theory from results of microgravity experiments. One of the other theories is an occurrence of a relative volume change due to a temperature change. Since the volume change must lead to a pressure change after caloric stimulation, we tried to measure the ampulla pressure of the horizontal semicircular canal in pigeons (Columba livia) using an improved servo micropipette system. The main result was that the ampulla pressure increased by cooling and decreased by heating. The changes of the ampulla pressure depended on the temperature change but were not influenced by the pigeon's head position.

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