The relationships between each electrical phenomenon in the inner ear were studied to analyse the mechanism of sound perception, especially about the role of the hair cell as the transducer to the auditory nerve.
The cochlear potentials, such as, endocochlear potential (EP), the negative potential within the organ of Corti, summating potential (SP) and the cochlear microphonic (CM) have been identified in the inner ear. Among of them, SP shows various electrical characteristics under several conditions, e.g., anoxia etc.
In this paper, we discussed about the mechanism of sound perception at the level of cochlea, refering to some factors that change the polarity of SP.