THE EFFECT OF ACETYLCHOLINE ON THE SPONTANEOUS DISCHARGE OF THE ACHROMATIC GANGLION CELLS IN PINEAL ORGAN OF THE FROG
乙酰胆碱对青蛙松果体中光敏神经节细胞自发放电的影响

The effect of microiontophoretically applied acetycholine (ACh) on achromatic (or Lumninance) neurons were studied in light-and dark-adapted photosensory pineal organs of the frog, Rana esculenta. Acetylcholine caused a significant increase of the maintained activity in about 82% (n = 124) of pineal neurons sampled. In addition, approximately 2% of the pineal neurons examined had inhibitory responses to acetylcholine, while 20 neurons(16%) were unresponsive, The dose-related ACh-induced excitation was reversible and reproducible.