Retinae were transplanted from embryonic rats to a location over the midbrain of unilaterally anucleated newborn rats. At maturity, the rats were trained to "lever-press" for a food reward. By using a Pavlovian conditioned suppression paradigm, it was found that light delivered to the transplant could be recognized by the host rat as a conditioned stimulus, resulting in a reduced rate of lever pressing.
No takes yet. Share an insight, caveat, or question.
Coffey et al. (1989) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: