Extinction learning, which consists of the inhibition of retrieval, can be learned without retrieval.

@article{Myskiw2015ExtinctionLW,
  title={Extinction learning, which consists of the inhibition of retrieval, can be learned without retrieval.},
  author={Jociane de Carvalho Myskiw and Cristiane Regina Guerino Furini and Bianca E Schmidt and Fl{\'a}via Magalh{\~a}es Freitas Ferreira and Ivan A. Izquierdo},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2015},
  volume={112 2},
  pages={E230-3}
}
In the present study we test the hypothesis that extinction is not a consequence of retrieval in unreinforced conditioned stimulus (CS) presentation but the mere perception of the CS in the absence of a conditioned response. Animals with cannulae implanted in the CA1 region of hippocampus were subjected to extinction of contextual fear conditioning. Muscimol infused intra-CA1 before an extinction training session of contextual fear conditioning (CFC) blocks retrieval but not consolidation of… CONTINUE READING
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