Nicol G D, Attwell D, Werblin F S
Brain Res. 1984 Apr 9;297(1):164-8. doi: 10.1016/0006-8993(84)90554-7.
In both rod and cone photoreceptors, polarization of the cell to positive potentials produces a slowing of the photocurrent. This could occur because, at positive potentials, the rate of removal of internal transmitter is slowed, or because the time for which the channels stay closed after interaction with internal transmitter is prolonged. Ion concentration changes within the cell may also contribute to the time course of the photocurrent.
在视杆和视锥光感受器中，细胞去极化至正电位都会导致光电流减慢。出现这种情况的原因可能是，在正电位时，细胞内递质的清除速率减慢，或者是通道与细胞内递质相互作用后保持关闭的时间延长。细胞内离子浓度的变化也可能影响光电流的时间进程。
