Evidence map›Paper›PMID 33112717›Full record

ReviewJournal of neurophysiology2020

Population coding in the cerebellum: a machine learning perspective.

Reza Shadmehr

Open access · greenAbstract readReview
In one paragraph

Review in Journal of neurophysiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.1field-weighted citation impact, top 12% 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

22 citing papers in PubMed, 30 citations in OpenAlex.

  1. Critical period plasticity enables credit assignment.bioRxiv : the preprint server for biology · 2026
    Article
  2. Article
  3. Review
  4. Consensus Paper: Models of Cerebellar Functions.Cerebellum (London, England) · 2026
    Review
  5. Comparison of Signals from Cerebellar Purkinje Cells and Deep Nuclei during Temporal Prediction in Primates.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  6. Article
  7. Review
  8. The olivary input to the cerebellum dissociates sensory events from movement plans.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  9. A cerebellar population coding model for sensorimotor learning.bioRxiv : the preprint server for biology · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Rate versus synchrony codes for cerebellar control of motor behavior.bioRxiv : the preprint server for biology · 2023
    Article
  15. Article
  16. Synchronous spiking of cerebellar Purkinje cells during control of movements.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  17. Visuomotor control in mice and primates.Neuroscience and biobehavioral reviews · 2021
    Review
  18. The cost of correcting for error during sensorimotor adaptation.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  19. Article
  20. Article
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

1 author at 1 institution in 1 country.

Reza ShadmehrDepartment of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, Maryland.ORCID 0000-0002-7686-2569
Johns Hopkins University · US

Funding

The multiple components of motor memoryR01NS078311 · NINDS · JOHNS HOPKINS UNIVERSITY · PI SHADMEHR, REZA · 2012 to 2021
$3.8M
A new theory of population coding in the cerebellumR01EB028156 · NIBIB · JOHNS HOPKINS UNIVERSITY · PI SHADMEHR, REZA · 2020 to 2020
$1.2M
DOD | Office of Naval Research (ONR) N00014-15-1-2312HHS | NIH | National Institute of Neurological Disorders and Stroke (NINDS) R01NS078311National Science Foundation (NSF) CNS-1714623NIBIB NIH HHS R01 EB028156NINDS NIH HHS R01 NS078311
6 · The paper itself

Abstract

The cere resembles a feedforward, three-layer network of neurons in which the "hidden layer" consists of Purkinje cells (P-cells) and the output layer consists of deep cerebellar nucleus (DCN) neurons. In this analogy, the output of each DCN neuron is a prediction that is compared with the actual observation, resulting in an error signal that originates in the inferior olive. Efficient learning requires that the error signal reach the DCN neurons, as well as the P-cells that project onto them. However, this basic rule of learning is violated in the cerebellum: the olivary projections to the DCN are weak, particularly in adulthood. Instead, an extraordinarily strong signal is sent from the olive to the P-cells, producing complex spikes. Curiously, P-cells are grouped into small populations that converge onto single DCN neurons. Why are the P-cells organized in this way, and what is the membership criterion of each population? Here, I apply elementary mathematics from machine learning and consider the fact that P-cells that form a population exhibit a special property: they can synchronize their complex spikes, which in turn suppress activity of DCN neuron they project to. Thus complex spikes cannot only act as a teaching signal for a P-cell, but through complex spike synchrony, a P-cell population may act as a surrogate teacher for the DCN neuron that produced the erroneous output. It appears that grouping of P-cells into small populations that share a preference for error satisfies a critical requirement of efficient learning: providing error information to the output layer neuron (DCN) that was responsible for the error, as well as the hidden layer neurons (P-cells) that contributed to it. This population coding may account for several remarkable features of behavior during learning, including multiple timescales, protection from erasure, and spontaneous recovery of memory.

Indexed as

Machine LearningAction PotentialsAnimalsCerebellar NucleiCerebellumConditioning, ClassicalEye MovementsHumansLearningMotor ActivityPurkinje Cellseyeblink conditioningmotor learningneural encodingsaccadessmooth pursuit

Identifiers

PMID33112717
PMCPMC7814897
OpenAlexW3097442738

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.