Cited by 509Memory and Neural MechanismsMemory Processes and InfluencesNeuroscience and Neuropharmacology Research

Projections from neocortex mediate top-down control of memory retrieval

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Rajasethupathy, Priyamvada, Sankaran, Sethuraman, Marshel, James H., Kim, Christina K., Ferenczi, Emily, Lee, Soo Yeun, Berndt, Andre, Ramakrishnan, Charu +4 more·2015·Nature

Abstract

Top-down prefrontal cortex inputs to the hippocampus have been hypothesized to be important in memory consolidation, retrieval, and the pathophysiology of major psychiatric diseases; however, no such direct projections have been identified and functionally described. Here we report the discovery of a monosynaptic prefrontal cortex (predominantly anterior cingulate) to hippocampus (CA3 to CA1 region) projection in mice, and find that optogenetic manipulation of this projection (here termed AC-CA) is capable of eliciting contextual memory retrieval. To explore the network mechanisms of this process, we developed and applied tools to observe cellular-resolution neural activity in the hippocampus while stimulating AC-CA projections during memory retrieval in mice behaving in virtual-reality environments. Using this approach, we found that learning drives the emergence of a sparse class of neurons in CA2/CA3 that are highly correlated with the local network and that lead synchronous population activity events; these neurons are then preferentially recruited by the AC-CA projection during memory retrieval. These findings reveal a sparsely implemented memory retrieval mechanism in the hippocampus that operates via direct top-down prefrontal input, with implications for the patterning and storage of salient memory representations.

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Authors
Rajasethupathy, P., Sankaran, S., Marshel, J. H., Kim, C. K., Ferenczi, E., Lee, S. Y., Berndt, A., Ramakrishnan, C., Jaffe, A., Lo, M., Liston, C., & Deisseroth, K.
Affiliations
  • Stanford University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Deisseroth, Karl
Venue
Nature
Published
2015-10
Volume
526
Issue
7575
Pages
653-659
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1829380695
Cited by
509
References
67
Citations by year
2026: 36 · 2025: 53 · 2024: 46 · 2023: 52 · 2022: 59 · 2021: 52 · 2020: 40 · 2019: 33 · 2018: 42 · 2017: 64 · 2016: 25 · 2015: 6
FWCI
27.15
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute of Mental Health (R00MH097822, R01MH075957)
  • National Institute on Drug Abuse (R37DA035377)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
top-down control, memory retrieval, prefrontal cortex, anterior cingulate cortex, hippocampus, contextual memory, neuronal ensembles, virtual reality, optogenetics, memory consolidation
MeSH terms
Animals, Conditioning, Psychological, Fear, Gyrus Cinguli, Hippocampus, Learning, Male, Memory, Mice, Inbred C57BL, Models, Neurological, Neural Pathways, Neurons, User-Computer Interface, Prefrontal Cortex, Neocortex, Mice, Optogenetics

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