Spatiotemporal patterns of neocortical activity around hippocampal sharp-wave ripples.
hippocampal-neocortical interaction
hippocampus
memory consolidation
mouse
neocortex
neuroscience
sharp-wave ripple
wide-field mesoscale optical imaging
Journal
eLife
ISSN: 2050-084X
Titre abrégé: Elife
Pays: England
ID NLM: 101579614
Informations de publication
Date de publication:
13 03 2020
13 03 2020
Historique:
received:
18
09
2019
accepted:
11
03
2020
pubmed:
14
3
2020
medline:
10
4
2021
entrez:
14
3
2020
Statut:
epublish
Résumé
A prevalent model is that sharp-wave ripples (SWR) arise 'spontaneously' in CA3 and propagate recent memory traces outward to the neocortex to facilitate memory consolidation there. Using voltage and extracellular glutamate transient recording over widespread regions of mice dorsal neocortex in relation to CA1 multiunit activity (MUA) and SWR, we find that the largest SWR-related modulation occurs in retrosplenial cortex; however, contrary to the unidirectional hypothesis, neocortical activation exhibited a continuum of activation timings relative to SWRs, varying from leading to lagging. Thus, contrary to the model in which SWRs arise 'spontaneously' in the hippocampus, neocortical activation often precedes SWRs and may thus constitute a trigger event in which neocortical information seeds associative reactivation of hippocampal 'indices'. This timing continuum is consistent with a dynamics in which older, more consolidated memories may in fact initiate the hippocampal-neocortical dialog, whereas reactivation of newer memories may be initiated predominantly in the hippocampus.
Identifiants
pubmed: 32167467
doi: 10.7554/eLife.51972
pii: 51972
pmc: PMC7096182
doi:
pii:
Banques de données
Dryad
['10.5061/dryad.qnk98sfbb']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Natural Sciences and Engineering Research Council of Canada
ID : 40352
Organisme : CIHR
ID : 390930
Pays : Canada
Organisme : CIHR
ID : 156040
Pays : Canada
Organisme : Alberta Prion Research Institute
ID : 43568
Organisme : Natural Sciences and Engineering Research Council of Canada
ID : 1631465
Organisme : Defense Advanced Research Projects Agency
ID : HR0011-18-2-0021
Organisme : NIA NIH HHS
ID : F30 AG069406
Pays : United States
Informations de copyright
© 2020, Karimi Abadchi et al.
Déclaration de conflit d'intérêts
JK, MN, SG, EB, AL, BM, MM No competing interests declared
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