Evidence map›Paper›PMID 32303713›Full record

ReviewNature reviews. Neuroscience2020

Backpropagation and the brain.

Timothy P Lillicrap, Adam Santoro, Luke Marris, Colin J Akerman, Geoffrey Hinton

Abstract readReview
PubMed Publisher
In one paragraph

Review in Nature reviews. Neuroscience, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 231 papers.

0numbers the graph read from it
0cells of the map it votes in
231citing papers in PubMed
60.3field-weighted citation impact, top 1% 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

231 citing papers in PubMed, 897 citations in OpenAlex.

  1. Article
  2. The neuroscience of transformers.Cognitive neurodynamics · 2026
    Article
  3. Diffusion of neuromodulators for temporal credit assignment.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Critical period plasticity enables credit assignment.bioRxiv : the preprint server for biology · 2026
    Article
  16. Article
  17. Synaptic Plasticity as a Function of the Temporal Derivative.bioRxiv : the preprint server for biology · 2026
    Article
  18. Article
  19. Article
  20. Article

171 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 2 countries.

Timothy P Lillicrap *DeepMind, London, UK. countzero@google.com.ORCID http://orcid.org/0000-0001-8918-486X
Adam Santoro *DeepMind, London, UK.
Luke MarrisDeepMind, London, UK.
Colin J AkermanDepartment of Pharmacology, University of Oxford, Oxford, UK.
Geoffrey HintonDepartment of Computer Science, University of Toronto, Toronto, Canada. geoffhinton@google.com.
Google DeepMind (United Kingdom) · GBUniversity of Oxford · GBUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

During learning, the brain modifies synapses to improve behaviour. In the cortex, synapses are embedded within multilayered networks, making it difficult to determine the effect of an individual synaptic modification on the behaviour of the system. The backpropagation algorithm solves this problem in deep artificial neural networks, but historically it has been viewed as biologically problematic. Nonetheless, recent developments in neuroscience and the successes of artificial neural networks have reinvigorated interest in whether backpropagation offers insights for understanding learning in the cortex. The backpropagation algorithm learns quickly by computing synaptic updates using feedback connections to deliver error signals. Although feedback connections are ubiquitous in the cortex, it is difficult to see how they could deliver the error signals required by strict formulations of backpropagation. Here we build on past and recent developments to argue that feedback connections may instead induce neural activities whose differences can be used to locally approximate these signals and hence drive effective learning in deep networks in the brain.

Indexed as

FeedbackAlgorithmsAnimalsCerebral CortexHumansLearningModels, NeurologicalNeural Networks, Computer

Identifiers

PMID32303713
OpenAlexW3016391357

What OpenQuestion holds

Textmetadata
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.