Cited by 10Embodied and Extended CognitionDementia and Cognitive Impairment ResearchNeurobiology of Language and Bilingualism

Evidence and implications of abnormal predictive coding in dementia

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Kocagoncu, Ece, Klimovich-Gray, Anastasia, Hughes, Laura E, Rowe, James B·2021·Brain

Abstract

The diversity of cognitive deficits and neuropathological processes associated with dementias has encouraged divergence in pathophysiological explanations of disease. Here, we review an alternative framework that emphasizes convergent critical features of cognitive pathophysiology. Rather than the loss of ‘memory centres’ or ‘language centres’, or singular neurotransmitter systems, cognitive deficits are interpreted in terms of aberrant predictive coding in hierarchical neural networks. This builds on advances in normative accounts of brain function, specifically the Bayesian integration of beliefs and sensory evidence in which hierarchical predictions and prediction errors underlie memory, perception, speech and behaviour. We describe how analogous impairments in predictive coding in parallel neurocognitive systems can generate diverse clinical phenomena, including the characteristics of dementias. The review presents evidence from behavioural and neurophysiological studies of perception, language, memory and decision-making. The reformulation of cognitive deficits in terms of predictive coding has several advantages. It brings diverse clinical phenomena into a common framework; it aligns cognitive and movement disorders; and it makes specific predictions on cognitive physiology that support translational and experimental medicine studies. The insights into complex human cognitive disorders from the predictive coding framework may therefore also inform future therapeutic strategies.

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  1. [88]Lansdall CJ Coyle-Gilchrist ITS Jones PS Apathy and impulsivity in frontotemporal lobar degeneration syndromes Brain 2017 6 1 140 6 1792 1807 10.1093/brain/awx101 28486594 PMC5868210 · DOI
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Authors
Kocagoncu, E., Klimovich-Gray, A., Hughes, L. E., & Rowe, J. B.
Affiliations
  • Cambridge Centre for Frontotemporal Dementia, Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0SZ, UK
  • Basque Centre on Cognition, Brain and Language, San Sebastian 20009, Spain
  • MRC Cognition and Brain Sciences Unit (GB)
Venue
Brain
Published
2021-07-08
Volume
144
Issue
11
Pages
3311-3321
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W3034547662
Cited by
3
References
210
Citations by year
2023: 1 · 2022: 1 · 2021: 1
FWCI
0.11
Type
journal article
Language
en
Open access
Locations
  • Brain (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Communities in ADDI (Universidad del Pais Vasco) (submittedVersion, cc-by)
  • Aberdeen University Research Archive (Aberdeen University) (submittedVersion)
  • Apollo (University of Cambridge) (submittedVersion)
  • arXiv (Cornell University)
  • Apollo
Funders
  • Dementias Platform UK and Alzheimer’s Research UK (RG94383, RG89702)
  • Wellcome Trust (103838)
  • Medical Research Council (SUAG/051 G101400)
  • National Institute for Health Research Cambridge Biomedical Research Centre
  • European Union’s Horizon 2020 Research and Innovation Programme
  • Marie Skłodowska-Curie (798971)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Embodied and Extended Cognition
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
Keywords
predictive coding, dementia, Bayesian brain, prediction error, hierarchical neural networks, memory, perception, language, decision-making, cognitive impairment, neurodegenerative diseases
MeSH terms
Brain, Cognition, Dementia, Humans

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