Evidence map›Paper›PMID 32289250›Full record

ArticleNeuron2020

Spaced Training Forms Complementary Long-Term Memories of Opposite Valence in Drosophila.

Pedro F Jacob, Scott Waddell

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in Neuron, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 53 papers.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed
6.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

53 citing papers in PubMed, 116 citations in OpenAlex.

  1. Article
  2. Unforgettable forgotten memories.Nature neuroscience · 2026
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  8. Twists to Classical Conditioning of AdultCold Spring Harbor protocols · 2025
    Article
  9. Article
  10. What could evolve in the evolution of memory?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Pedro F JacobCentre for Neural Circuits and Behaviour, University of Oxford, Oxford OX1 3TA, UK.
Scott WaddellCentre for Neural Circuits and Behaviour, University of Oxford, Oxford OX1 3TA, UK. Electronic address: scott.waddell@cncb.ox.ac.uk.
University of Oxford · GB

Funding

Wellcome Trust 200846/Z/16/Z
6 · The paper itself

Abstract

Forming long-term memory (LTM) often requires repetitive experience spread over time. Studies in Drosophila suggest aversive olfactory LTM is optimal after spaced training, multiple trials of differential odor conditioning with rest intervals. Memory after spaced training is frequently compared to that after the same number of trials without intervals. Here we show that, after spaced training, flies acquire additional information and form an aversive memory for the shock-paired odor and a slowly emerging and more persistent "safety-memory" for the explicitly unpaired odor. Safety-memory acquisition requires repetition, order, and spacing of the training trials and relies on triggering specific rewarding dopaminergic neurons. Co-existence of aversive and safety memories is evident as depression of odor-specific responses at different combinations of junctions in the mushroom body output network; combining two outputs appears to signal relative safety. Having complementary aversive and safety memories augments LTM performance after spaced training by making the odor preference more certain.

Indexed as

OdorantsSafetyAnimalsAvoidance LearningConditioning, ClassicalDopaminergic NeuronsDrosophila melanogasterMemory, Long-TermMushroom BodiesNeuronsSmellTime Factorsmemory, spaced training, safety learning, dopamine, Drosophila

Identifiers

PMID32289250
PMCPMC7302427
OpenAlexW3015422409

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.