Substance P-containing neurons of the avian suprachiasmatic nucleus project directly to the nucleus of Edinger-Westphal.

@article{Gamlin1982SubstancePN,
  title={Substance P-containing neurons of the avian suprachiasmatic nucleus project directly to the nucleus of Edinger-Westphal.},
  author={Paul D.R Gamlin and Anton Reiner and Harvey J. Karten},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1982},
  volume={79 12},
  pages={3891-5}
}
Retrograde and anterograde pathway tracing techniques were used in the pigeon to study afferent visual input from the suprachiasmatic nucleus (SCN) of the hypothalamus to the nucleus of Edinger-Westphal (EW), the parasympathetic visceral efferent component of the oculomotor complex. Horseradish peroxidase injected into the EW retrogradely labeled numerous neurons in the contralateral SCN, a retinorecipient hypothalamic nucleus, as well as a few neurons in the ipsilateral SCN. Autoradiographic… CONTINUE READING

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