DC injection alters spontaneous otoacoustic emission frequency in the frog.
A permanent wire electrode was implanted in the inner ear of the green frog (Rana esculenta). Through this electrode direct current was delivered to the inner ear fluid of the frog, during recording of a spontaneous otoacoustic emission (SOAE). Both SOAE frequency and amplitude turned out to depend on DC level and polarity. Possible explanations for the observed phenomena are given, based on a dissipative limit-cycle oscillator model for SOAE generation, and the assumption that SOAE frequency depends on hair cell ion channel inductance.
Wit
H P
HP
Institute of Audiology, University Hospital, Groningen, The Netherlands.
van Dijk
P
P
Segenhout
J M
JM
D000818:Animals; D007758:Ear, Inner / Q000502:physiology; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006198:Hair Cells, Auditory / Q000502:physiology; D007473:Ion Channels / Q000502:physiology; D008954:Models, Biological; D011893:Rana esculenta
D007473:Ion Channels