Distinct Neural Circuits for the Formation and Retrieval of Episodic Memories

Dheeraj S. Roy, Takashi Kitamura, Teruhiro Okuyama, Sachie K. Ogawa, Chen Sun, Yuichi Obata, Atsushi Yoshiki, Susumu Tonegawa

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The formation and retrieval of a memory is thought to be accomplished by activation and reactivation, respectively, of the memory-holding cells (engram cells) by a common set of neural circuits, but this hypothesis has not been established. The medial temporal-lobe system is essential for the formation and retrieval of episodic memory for which individual hippocampal subfields and entorhinal cortex layers contribute by carrying out specific functions. One subfield whose function is poorly known is the subiculum. Here, we show that dorsal subiculum and the circuit, CA1 to dorsal subiculum to medial entorhinal cortex layer 5, play a crucial role selectively in the retrieval of episodic memories. Conversely, the direct CA1 to medial entorhinal cortex layer 5 circuit is essential specifically for memory formation. Our data suggest that the subiculum-containing detour loop is dedicated to meet the requirements associated with recall such as rapid memory updating and retrieval-driven instinctive fear responses.

Original languageEnglish (US)
Pages (from-to)1000-1012.e19
JournalCell
Volume170
Issue number5
DOIs
StatePublished - Aug 24 2017

Fingerprint

Episodic Memory
Entorhinal Cortex
Hippocampus
Data storage equipment
Networks (circuits)
Temporal Lobe
Fear
Chemical activation

Keywords

  • entorhinal cortex
  • episodic memory
  • hippocampus
  • mammillary bodies
  • memory formation
  • memory retrieval
  • memory updating
  • neural circuits
  • stress hormone
  • Subiculum

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Distinct Neural Circuits for the Formation and Retrieval of Episodic Memories. / Roy, Dheeraj S.; Kitamura, Takashi; Okuyama, Teruhiro; Ogawa, Sachie K.; Sun, Chen; Obata, Yuichi; Yoshiki, Atsushi; Tonegawa, Susumu.

In: Cell, Vol. 170, No. 5, 24.08.2017, p. 1000-1012.e19.

Research output: Contribution to journalArticle

Roy, DS, Kitamura, T, Okuyama, T, Ogawa, SK, Sun, C, Obata, Y, Yoshiki, A & Tonegawa, S 2017, 'Distinct Neural Circuits for the Formation and Retrieval of Episodic Memories', Cell, vol. 170, no. 5, pp. 1000-1012.e19. https://doi.org/10.1016/j.cell.2017.07.013
Roy, Dheeraj S. ; Kitamura, Takashi ; Okuyama, Teruhiro ; Ogawa, Sachie K. ; Sun, Chen ; Obata, Yuichi ; Yoshiki, Atsushi ; Tonegawa, Susumu. / Distinct Neural Circuits for the Formation and Retrieval of Episodic Memories. In: Cell. 2017 ; Vol. 170, No. 5. pp. 1000-1012.e19.
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