抄録
The DC potential and K+ activity in the stria vascularis were simultaneously recovered from normal and Kanamycin-deafened guinea pigs, using K+-selective microelectrode. The positive DC potential, possibly the resting potential of marginal cell, was approximately 40-80mV and significantly lower than the endocochlear potential (EP). During anoxia, that DC potential of both groups showed parallel decreases. The K+ activity ranged from 20 to 60mEq/1 and was much lower than that of the endolymph before and during anoxia in both groups. These results suggest that K+ pumps may exist at the basolateral and luminal membranse of the strial marginal cell.
