Editing Place cell (section)

===Reactivation, replay, and preplay===
{{main|Hippocampal replay}}
Place cells often exhibit reactivation outside their place fields. This reactivation has a much faster time scale than the actual experience, and it occurs mostly in the same order in which it was originally experienced, or, more rarely, in reverse. Replay is believed to have a functional role in [[memory retrieval]] and [[memory consolidation]].<ref>{{Cite journal|last1=Ólafsdóttir|first1=H. Freyja|last2=Bush|first2=Daniel|last3=Barry|first3=Caswell|date=2018-01-08|title=The Role of Hippocampal Replay in Memory and Planning|url= |journal=Current Biology|language=en|volume=28|issue=1|pages=R37–R50|doi=10.1016/j.cub.2017.10.073|issn=0960-9822|pmid=29316421|pmc=5847173}}</ref> However, when replay is disturbed, it does not necessarily affect place coding, which means it is not essentially for consolidation in all circumstances.<ref>{{Cite journal|last1=Joo|first1=Hannah R.|last2=Frank|first2=Loren M.|date=2018|title=The hippocampal sharp wave–ripple in memory retrieval for immediate use and consolidation|journal=Nature Reviews Neuroscience|language=en|volume=19|issue=12|pages=744–757|doi=10.1038/s41583-018-0077-1|pmid=30356103|pmc=6794196|issn=1471-0048}}</ref> The same sequence of activity may occur before the actual experience. This phenomenon, termed preplay,<ref>{{Cite journal |last1=Dragoi |first1=George |last2=Tonegawa |first2=Susumu |date=January 2011 |title=Preplay of future place cell sequences by hippocampal cellular assemblies |journal=Nature |language=en |volume=469 |issue=7330 |pages=397–401 |doi=10.1038/nature09633 |issn=0028-0836 |pmc=3104398 |pmid=21179088|bibcode=2011Natur.469..397D }}</ref> may have a role in [[prediction]]<ref>{{Cite journal |last1=Liu |first1=Kefei |last2=Sibille |first2=Jeremie |last3=Dragoi |first3=George |date=September 2018 |title=Generative Predictive Codes by Multiplexed Hippocampal Neuronal Tuplets |journal=Neuron |language=en |volume=99 |issue=6 |pages=1329–1341.e6 |doi=10.1016/j.neuron.2018.07.047|pmid=30146305 |s2cid=52092903 |doi-access=free }}</ref> and [[learning]].<ref>{{Cite journal|last1=Buhry|first1=Laure|last2=Azizi|first2=Amir H.|last3=Cheng|first3=Sen|date=2011|title=Reactivation, Replay, and Preplay: How It Might All Fit Together|journal=Neural Plasticity|language=en|volume=2011|pages=203462|doi=10.1155/2011/203462|pmid=21918724|pmc=3171894|issn=2090-5904|doi-access=free}}</ref>