Consolidation alters motor sequence-specific distributed representations
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Abstract
Functional magnetic resonance imaging (fMRI) studies investigating the acquisition of sequential motor skills in humans have revealed learning-related functional reorganizations of the cortico-striatal and cortico-cerebellar motor systems accompanied with an initial hippocampal contribution. Yet, the functional significance of these activity-level changes remains ambiguous as they convey the evolution of both sequence-specific knowledge and unspecific task ability. Moreover, these changes do not specifically assess the occurrence of learning-related plasticity. To address these issues, we investigated local circuits tuning to sequence-specific information using multivariate distances between patterns evoked by consolidated or newly acquired motor sequences production. The results reveal that representations in dorsolateral striatum, prefrontal and secondary motor cortices are greater when executing consolidated sequences than untrained ones. By contrast, sequence representations in the hippocampus and dorsomedial striatum becomes less engaged. Our findings show, for the first time in humans, that complementary sequence-specific motor representations evolve distinctively during critical phases of skill acquisition and consolidation.
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Confounding in GWAS can cause biases in downstream applications, including estimation of heritability and genetic correlation, Mendelian Randomization analyses, and inferences of natural selection.
“Confounding can cause biases in downstream applications, including: estimation of heritability and genetic correlation6,7, Mendelian Randomization analyses13, and inferences of natural selection4,5.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [5]
The citation is attached to the claim about Mendelian Randomization analyses. The Materials and methods passages discuss fMRI multivariate analysis and statistical testing, not GWAS confounding or Mendelian Randomization; searches for those terms found no relevant passage in our copy. (LLM, conf=0.76)
Experimental — accuracy not yet measuredConfounding in GWAS can cause biases in downstream applications, including estimation of heritability and genetic correlation, Mendelian Randomization analyses, and inferences of natural selection.
“Confounding can cause biases in downstream applications, including: estimation of heritability and genetic correlation6,7, Mendelian Randomization analyses13, and inferences of natural selection4,5.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [4]
The Materials and methods passages on multivariate pattern analysis concern fMRI representations of motor sequences, not genetic association studies. Searches for GWAS confounding, heritability, genetic correlation, Mendelian randomization, and natural selection found no passage addressing the claim in our copy. (LLM, conf=0.78)
Experimental — accuracy not yet measuredGenetic associations (including those from GWAS) can be affected by gene-environment correlations and non-random mating, such as indirect genetic effects, assortative mating, and population stratification, leading to biased inferences.
“However, genetic associations can be affected by gene-environment correlations and non-random mating, which can lead to biased inferences in downstream analyses.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [5]
The Introduction discusses interpretation of brain activity during motor-sequence learning, and the Materials and methods discusses statistical testing of imaging data (page numbers unavailable). Searches for gene–environment correlation, non-random mating, assortative mating, and population stratification found no passage addressing bias in genetic associations. (LLM, conf=0.78)
Experimental — accuracy not yet measuredGenetic associations (including those from GWAS) can be affected by gene-environment correlations and non-random mating, such as indirect genetic effects, assortative mating, and population stratification, leading to biased inferences.
“However, genetic associations can be affected by gene-environment correlations and non-random mating, which can lead to biased inferences in downstream analyses.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [4]
The Materials and methods section discusses fMRI multivariate analysis and motor-sequence performance, not genetic associations. Searches for gene–environment correlation, non-random mating, GWAS, assortative mating, and population stratification found no passage in our copy addressing the claim. (LLM, conf=0.78)
Experimental — accuracy not yet measuredAnalytical techniques including PCA and linear mixed models reduce population stratification confounding but often leave residual confounding in GWAS results.
“Analytical techniques including principal component analysis (PCA) and linear mixed models have been developed to reduce population stratification confounding12, but these techniques often leave residual confounding in GWAS results5,8,10.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [5]
The citation is attached to the claim that PCA and linear mixed models reduce population-stratification confounding. The Materials and methods section discusses multivariate analysis of brain-imaging data, not GWAS; searches for PCA, linear mixed models, population stratification, and genetic ancestry found no passage addressing that claim. The later residual-confounding clause carries different citations. (LLM, conf=0.78)
Experimental — accuracy not yet measured
Polygenic indices based on direct genetic effects from FGWAS have favorable properties due to the removal of confounding from PGI weights, making them suited to applications that are sensitive to confounding.
“Polygenic predictors (called polygenic indices, PGIs, or polygenic scores) based on DGE estimates from FGWAS – hereafter, DGE PGIs – have favorable properties due to the removal of confounding from PGI weights, making them suited to applications that are sensitive to confounding4,5,9,13,23.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [5]
The Materials and methods section discusses fMRI multivariate pattern analysis of motor sequences, not genetic prediction. Searches for polygenic indices, direct genetic effects, FGWAS, and confounding found no passage addressing the attributed claim in our copy. (LLM, conf=0.78)
Experimental — accuracy not yet measuredInferences from LD score regression applied to GWAS results appear fairly robust to confounding due to population stratification, at least some of which is adjusted out by LDSC.
“Inferences drawn from the application of LD score regression (LDSC) to GWAS results appear to be fairly robust to confounding due to population stratification, at least some of which is adjusted out by LDSC5,33.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [5]
The Materials and methods section describes fMRI multivariate analysis and statistical testing, not LD score regression of GWAS results. Searches for LDSC, GWAS, population stratification, and related genetic-association terms found no passage addressing whether LDSC adjusts for stratification. (LLM, conf=0.78)
Experimental — accuracy not yet measuredSome, but not all, methods using genome-wide summary statistics have been shown to be particularly vulnerable to biased inferences due to uncorrected population stratification confounding.
“Some, but not all, of these methods have been shown to be particularly vulnerable to biased inferences due to uncorrected population stratification confounding: for example, measuring the strength of AM23, assessing evidence for IGEs11,42,43, assessing evidence for polygenic selection using ancient and modern DNA4,5,9, and Mendelian Randomisation13.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [5]
The Materials and methods passages on multivariate pattern analysis concern fMRI measures of motor-sequence representations, not genome-wide summary statistics. Searches for population stratification, polygenic selection, indirect genetic effects, and Mendelian randomization found no passage addressing the claimed vulnerability to confounding. (LLM, conf=0.78)
Experimental — accuracy not yet measuredSome, but not all, methods using genome-wide summary statistics have been shown to be particularly vulnerable to biased inferences due to uncorrected population stratification confounding.
“Some, but not all, of these methods have been shown to be particularly vulnerable to biased inferences due to uncorrected population stratification confounding: for example, measuring the strength of AM23, assessing evidence for IGEs11,42,43, assessing evidence for polygenic selection using ancient and modern DNA4,5,9, and Mendelian Randomisation13.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [4]
The Materials and methods section discusses fMRI-based motor-sequence analyses, including statistical correction for brain-imaging data, not genome-wide summary statistics. Searches for population-stratification confounding, Mendelian randomisation, indirect genetic effects, and polygenic selection found no passage addressing the claim. (LLM, conf=0.78)
Experimental — accuracy not yet measuredPolygenic indices based on direct genetic effects from FGWAS have favorable properties due to the removal of confounding from PGI weights, making them suited to applications that are sensitive to confounding.
“Polygenic predictors (called polygenic indices, PGIs, or polygenic scores) based on DGE estimates from FGWAS – hereafter, DGE PGIs – have favorable properties due to the removal of confounding from PGI weights, making them suited to applications that are sensitive to confounding4,5,9,13,23.”
From Family-GWAS reveals effects of environment and mating on genetic associations (2024) · cites this paper as [4]
The Introduction and Materials and methods discuss motor-sequence consolidation and fMRI pattern analysis, not polygenic indices. Searches for direct genetic effects, FGWAS, polygenic scores, and genetic confounding found no passage addressing the claim in our copy; no page numbers were provided. (LLM, conf=0.78)
Experimental — accuracy not yet measured
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- Authors
- Pinsard, B., Boutin, A., Gabitov, E., Lungu, O., Benali, H., & Doyon, J.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Montreal Neurological Institute and Hospital (CA)
- Institut Universitaire de Gériatrie de Montréal (CA)
- Corresponding author
- Pinsard, Basile
- Doyon, Julien
- Venue
- eLife
- Publisher
- eLife Sciences Publications, Ltd
- Published
- 2019-03-18
- Volume
- 8
- Pages
- e39324
- ISSN
- 2050-084X (ISSN-L)
- PMC
- PMC6461441
- OpenAlex
- W2950681580
- Cited by
- 1,066
- References
- 108
- Citations by year
- 2026: 63 · 2025: 124 · 2024: 130 · 2023: 155 · 2022: 210 · 2021: 209 · 2020: 136 · 2019: 37 · 2018: 2
- FWCI
- 85.98
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- eLife (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- HAL (submittedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Canadian Institutes of Health Research (MOP 97830)
- Ministère de l'Education Nationale, de l'Enseignement Superieur et de la Recherche (PhD scholarship)
- Sorbonne Université (PhD study abroad grant)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
- Keywords
- motor sequence learning, skill consolidation, dorsolateral striatum, dorsomedial striatum, hippocampus, secondary motor cortex, prefrontal cortex, corticostriatal circuits, multivariate pattern analysis
- MeSH terms
- Adolescent, Corpus Striatum, Efferent Pathways, Female, Hippocampus, Humans, Learning, Magnetic Resonance Imaging, Male, Motor Cortex, Nerve Net, Neuronal Plasticity, Young Adult
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