Retinal transplants can drive a pupillary reflex in host rat brains.

  title={Retinal transplants can drive a pupillary reflex in host rat brains.},
  author={Henry J. Klassen and Raymond D. Lund},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={84 19},
Retinae taken from embryonic rats were transplanted over the midbrain of neonatal rats, from whom one eye had been removed. After 5 months, the optic nerve of the remaining eye was cut, and the transplant was exposed. Illumination of the transplant caused pupilloconstriction of the host eye, a response abolished by damaging the transplant. Thus neural transplants are capable of driving specific reflexes in response to natural stimuli. 

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