Nucleus isthmi provides most tectal choline acetyltransferase in the frog Rana pipiens.

@article{Ricciuti1985NucleusIP,
  title={Nucleus isthmi provides most tectal choline acetyltransferase in the frog Rana pipiens.},
  author={A J Ricciuti and Edward R. Gruberg},
  journal={Brain research},
  year={1985},
  volume={341 2},
  pages={399-402}
}
Up to 9 weeks following the removal of unilateral retinal input, choline acetyltransferase (ChAT) activity in the de-afferented tectal lobe is not significantly different from the intact tectal lobe. At 14 weeks, there is a 29% increase in the de-afferented side compared to the intact side. Following unilateral lesion of nucleus isthmi, ChAT activity in the tectal lobe ipsilateral to the lesion is approximately 30% of that measured in the contralateral lobe. Following bilateral n. isthmi lesion… CONTINUE READING