Abstract
Two cases with different audiogram of presbycusis out of 105 temporal bone series were demonstrated and discussed.
The atrophy of the spiral ganglion seemed to coincide well with the audiometric results. The changes in the organ of Corti and the stria vascularis were slight.
The changes in the central auditory pathway seemed to cause the hearing threshold elevation in low frequency range as well as in high.
The arteriosclerosis, together with senile atrophy, might influence the degeneration of the, cochlea and central auditory pathway.
A comment of this study was presented at the 68th Annual Congress of the Oto-Rhino-Laryngological Society of Japan, March 30-31, 1967.
