ISSN:
1434-4726
Keywords:
Action potential
;
Utricular nerve
;
Striola
;
Cupula
;
Physiological polarity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The frog Rana nigromaculata was used as an experimental model. The utricle and its nerve were isolated with the anterior and the lateral semicircular canal ampullae in frog Ringer's solution. The utricular otoconia and the otoconial membrane were then carefully removed. The halved anterior canal cupula was next placed in the tip of a glass microelectrode, which was mounted on a micromanipulator. The cupula was placed in the center of either the medial or the lateral part of the macula and was moved toward or away from the striola along the axis vertical to the striola. When the medial part of the macula was stimulated, 5 μm of striolapetal cupular movement elicited an excitatory nerve discharge. When the lateral part of the macula was stimulated, the striolapetal stimulus likewise induced an excitatory response. These results indicate the existence of physiological polarity on the utricular macula.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00455308
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