II Behavior of the Cochlear Blood Flow

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Abstract
The cochlear blood flow under ordinary conditions is stable. Asphyxia causes an increase at first and then decrease of the cochlear blood flow. The recovery is remarkably rapid and an overshooting is observed. Cochlear microphonics and endolymphatic DC potential show parallel changes with the cochlear blood flow. Cochlear blood flow is decreased after the breathing of pure oxygen. Cochlear blood flow is increased after the breathing of 10% CO2 in oxygen. Acoustic stimulation in intensities of 90 to 120 phone does not decrease, usually leaves unchanged, and sometimes slightly increases the cochlear blood flow. The relative anemia in the cochlea is considered as an important reason for auditory fatigue.

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