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Abstract
The cochlear specimens prepared by the freezing-method may be subjected successfully to the precise histochemical examination on the distribution of succinic dehydrogenase and/or DPN-diaphorase. The following results were obtained by this method.
1. Concentration of both enzymes of both the stria vascularis and lower portions of the spiral ligament is larger in the lower turns than in the higher turns.
2. There are no differences in the enzymic activities of the organ of Corti between each turn.