scholarly journals Production of endolymph in the semicircular canal of the frog Rana esculenta.

1986 ◽  
Vol 371 (1) ◽  
pp. 17-28 ◽  
Author(s):  
C Bernard ◽  
E Ferrary ◽  
O Sterkers
Keyword(s):  
Semicircular Canal ◽  
Rana Esculenta

Adenylate cyclase and carbonic anhydrase in the semicircular canal epithelium of the frog Rana esculenta

1990 ◽  
Vol 262 (3) ◽  
pp. 579-585 ◽  
Author(s):  
Olivier Oudar ◽  
Evelyne Ferrary ◽  
G�rard Feldmann
Keyword(s):  
Carbonic Anhydrase ◽  
Adenylate Cyclase ◽  
Semicircular Canal ◽  
Rana Esculenta

Simulation of cupulolithiasis and canalolithiasis by an animal model1

2008 ◽  
Vol 18 (2-3) ◽  
pp. 89-96
Author(s):  
Paolo Valli ◽  
Laura Botta ◽  
Gianpiero Zucca ◽  
Stefano Valli ◽  
Angelo Buizza
Keyword(s):  
Firing Rate ◽  
Semicircular Canal ◽  
Rana Esculenta ◽  
Posterior Semicircular Canal ◽  
Receptor Stimulation ◽  
Experimental Conditions ◽  
Physical Mechanisms ◽  
Microsphere Size

The physical mechanisms responsible for cupulolithiasis and canalolithiasis have been investigated by two groups of experiments in isolated posterior semicircular canal (SCC) of frog (Rana esculenta L.). First, clouds of 10-30 isolated otoconia were let to fall (snowfall of otoconia) either through the ampulla onto the cupula, or inside the long arm of the canal, opposite to the cupula. Second, microspheres ranging 30 to 350 μm in diameter were gently moved to and fro inside the long arm of the canal by a micromanipulator. The effects were evaluated by recording the firing rate (Nfr) of the ampullary nerve. Snowfall of otoconia produced detectable changes of Nfr only when otoconia got in contact with the cupula, but not when falling through the endolymph. Movement of the microspheres in the canal long arm induced Nfr changes only if the microsphere diameter exceeded about 50 μm. Although the exact microsphere size needed for receptor stimulation may depend on the experimental conditions, these results strongly suggest that debris moving inside a SCC (canalolithiasis) can produce transcupular pressures able to stimulate ampullar receptors only if they have suitable size, whereas isolated otoconia cannot, except when lying on the cupula (cupulolithiasis).

Clinical Outcomes of Middle Fossa Craniotomy for Superior Semicircular Canal Dehiscence Repair

2015 ◽  
Vol 76 (S 01) ◽  
Author(s):  
Lawrance Chung ◽  
Nolan Ung ◽  
Daniel Nagasawa ◽  
Panayiotis Pelargos ◽  
Kimberly Thill ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Semicircular Canal ◽  
Middle Fossa ◽  
Superior Semicircular Canal Dehiscence ◽  
Superior Semicircular Canal ◽  
Canal Dehiscence

THE GAMETOKINETIC ACTIVITY OF SEROTONIN IN THE MALE OF RANA ESCULENTA

1962 ◽  
Vol 40 (3_Suppl) ◽  
pp. S146 ◽  
Author(s):  
B. Salvadori ◽  
G. Cagnazzo ◽  
G. Bernardini
Keyword(s):  
Rana Esculenta
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