Time is just a memory

Experience unfolds continuously in time, but we remember discrete sequences of events. In this issue of Nature Neuroscience, Montchal et al. describe brain activity patterns that predict how well people remember precisely when recent events occurred. Converging evidence suggests that homologous neural machinery structures temporal representations in rats and people.

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Fig. 1: Memory time structured by behavioral episodes.


  1. 1.

    Tulving, E. Annu. Rev. Psychol. 53, 1–25 (2002).

    Article  Google Scholar 

  2. 2.

    Eichenbaum, H., Dudchenko, P., Wood, E., Shapiro, M. & Tanila, H. Neuron 23, 209–226 (1999).

    CAS  Article  Google Scholar 

  3. 3.

    Eichenbaum, H. Nat. Rev. Neurosci. 1, 41–50 (2000).

    CAS  Article  Google Scholar 

  4. 4.

    Gallagher, M. & Koh, M. T. Curr. Opin. Neurobiol. 21, 929–934 (2011).

    CAS  Article  Google Scholar 

  5. 5.

    Chao, O. Y., Huston, J. P., Li, J. S., Wang, A. L. & de Souza Silva, M. A. Hippocampus 26, 633–645 (2016).

    Article  Google Scholar 

  6. 6.

    Moser, E. I., Moser, M. B. & McNaughton, B. L. Nat. Neurosci. 20, 1448–1464 (2017).

    CAS  Article  Google Scholar 

  7. 7.

    O’Keefe, J. & Nadel, L. The Hippocampus as a Cognitive Map. (Oxford Press, Oxford, UK, 1978).

    Google Scholar 

  8. 8.

    Berger, T. W., Alger, B. & Thompson, R. F. Science 192, 483–485 (1976).

    CAS  Article  Google Scholar 

  9. 9.

    Tsao, A. et al. Nature 561, 57–62 (2018).

    CAS  Article  Google Scholar 

  10. 10.

    Kraus, B. J. et al. Neuron 88, 578–589 (2015).

    CAS  Article  Google Scholar 

  11. 11.

    Montchal, M.E., Reagh, Z.M. & Yassa, M.A. Nat. Neurosci. https://doi.org/10.1038/s41593-018-0303-1 (2018).

  12. 12.

    Wang, C. et al. Science 362, 945–949 (2018).

    CAS  Article  Google Scholar 

  13. 13.

    Rovelli, C. The Order of Time. (Riverhead Books, New York, 2017).

    Google Scholar 

  14. 14.

    Clewett, D. & Davachi, L. Curr. Opin. Behav. Sci. 17, 186–193 (2017).

    Article  Google Scholar 

  15. 15.

    Pastalkova, E., Itskov, V., Amarasingham, A. & Buzsáki, G. Science 321, 1322–1327 (2008).

    CAS  Article  Google Scholar 

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Correspondence to Matthew L. Shapiro.

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Shapiro, M.L. Time is just a memory. Nat Neurosci 22, 151–153 (2019). https://doi.org/10.1038/s41593-018-0331-x

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