[The effect of calcium ion on ampullary nerve potential].
The effect of calcium ion (Ca2+) in the endolymphatic and/or perilymphatic space of the posterior semicircular canal (p.s.c.) nerve response was studied. When both endolymph and perilymph contained no Ca2+, no p.s.c. nerve response was observed. When only the endolymph contained Ca2+ and the perilymph was Ca2+ free, again no nerve response was observed. On the other hand, when only the perilymph contained Ca2+, p.s.c. nerve response was evoked. Therefore, Ca2+ in the perilymph was considered to be essential for maintaining the function of the p.s.c. as a mechanoreceptor.
Hirakawa
H
H
Department of Otolaryngology, Hiroshima University School of Medicine.
Harada
Y
Y
Suzuki
M
M
Kanemi
Y
Y
D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000502:physiology*; D004710:Endolymph; D066298:In Vitro Techniques; D008465:Mechanoreceptors / Q000502:physiology; D010498:Perilymph; D011892:Rana catesbeiana; D012665:Semicircular Canals / Q000294:innervation* / Q000502:physiology; D000159:Vestibulocochlear Nerve / Q000502:physiology*
D002118:Calcium