Summary
Isolated posterior semicircular canals from the bull frog model were used. The cupula was removed from the crista and the sensory cilia on the crista were depressed toward the canal side by using a glass micropipette. Seven different points were selected for stimulation on the ampullary wall. Ampullary nerve action potentials induced by depression were recorded and were converted into spike-density histograms. Response decrementai time constants were measured on these histograms. The longest time constant was measured at the two lateral points of stimulation and progressively shortened toward the central point of stimulation. These results indicate that the origin of the adaptation is possibly sensorineural.
Similar content being viewed by others
References
Ariki T (1984) Single unit response of posterior semicircular nerve of the frog. Ear Res Jpn 15:119–121
Blanks RHI, Estes MS, Markham CH (1975) Physiologic characteristics of vestibular firstorder canal neurons in the cat. II. Responses to constant angular acceleration. J Neurophysiol 38:1250–1268
Harada Y, Hirata K (1981) Phasic components of frog semicircular canal. Ann NY Acad Sci 374:31–39
Precht W, Llinas R, Clarke M (1971) Physiological responses of frog vestibular fibers to horizontal angular rotation. Exp Brain Res 13:378–407
Suzuki M, Harada Y (1985) Exposure and direct stimulation of the semicircular canal cupula. Arch Otorhinolaryngol 241:141–147
Suzuki M, Harada Y, Sugata Y (1984) An experimental study on a function of the cupula. Effect of cupula removal on the ampullary nerve action potential. Arch Otorhinolaryngol 241:75–81
Taglietti V, Valli P, Casella C (1973) Discharge properties and innervation of the sensory units in the crista ampullaris. Arch Sci Biol 57:73–86
Yagi T, Simpson N, Markham CH (1978) Physiological properties of the cat's first order horizontal canal neurons. Equilibrium Res 37:13–18
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Suzuki, M., Harada, Y. & Oue, K. Physiological localization of the semicircular canal receptors in the crista. Arch Otorhinolaryngol 242, 195–201 (1985). https://doi.org/10.1007/BF00454421
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00454421