After rabbits learn to associate a tone with a small shock near the eye, they blink when they hear the tone. Learning requires activation of nerve fibres known as climbing fibres. Inhibition of these fibres leads to 'unlearning'.
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Kitazawa, S. Ready to unlearn. Nature 416, 271–273 (2002). https://doi.org/10.1038/416270a
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DOI: https://doi.org/10.1038/416270a
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