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Dopamine, Affordance and Active Inference
The role of dopamine in behaviour and decision-making is often cast in terms of reinforcement learning and optimal decision theory. Here, we present an alternative view that frames the physiology of dopamine in terms of Bayes-optimal behaviour. In this account, dopamine controls the precision or sal...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3252266/ https://www.ncbi.nlm.nih.gov/pubmed/22241972 http://dx.doi.org/10.1371/journal.pcbi.1002327 |
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author | Friston, Karl J. Shiner, Tamara FitzGerald, Thomas Galea, Joseph M. Adams, Rick Brown, Harriet Dolan, Raymond J. Moran, Rosalyn Stephan, Klaas Enno Bestmann, Sven |
author_facet | Friston, Karl J. Shiner, Tamara FitzGerald, Thomas Galea, Joseph M. Adams, Rick Brown, Harriet Dolan, Raymond J. Moran, Rosalyn Stephan, Klaas Enno Bestmann, Sven |
author_sort | Friston, Karl J. |
collection | PubMed |
description | The role of dopamine in behaviour and decision-making is often cast in terms of reinforcement learning and optimal decision theory. Here, we present an alternative view that frames the physiology of dopamine in terms of Bayes-optimal behaviour. In this account, dopamine controls the precision or salience of (external or internal) cues that engender action. In other words, dopamine balances bottom-up sensory information and top-down prior beliefs when making hierarchical inferences (predictions) about cues that have affordance. In this paper, we focus on the consequences of changing tonic levels of dopamine firing using simulations of cued sequential movements. Crucially, the predictions driving movements are based upon a hierarchical generative model that infers the context in which movements are made. This means that we can confuse agents by changing the context (order) in which cues are presented. These simulations provide a (Bayes-optimal) model of contextual uncertainty and set switching that can be quantified in terms of behavioural and electrophysiological responses. Furthermore, one can simulate dopaminergic lesions (by changing the precision of prediction errors) to produce pathological behaviours that are reminiscent of those seen in neurological disorders such as Parkinson's disease. We use these simulations to demonstrate how a single functional role for dopamine at the synaptic level can manifest in different ways at the behavioural level. |
format | Online Article Text |
id | pubmed-3252266 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-32522662012-01-12 Dopamine, Affordance and Active Inference Friston, Karl J. Shiner, Tamara FitzGerald, Thomas Galea, Joseph M. Adams, Rick Brown, Harriet Dolan, Raymond J. Moran, Rosalyn Stephan, Klaas Enno Bestmann, Sven PLoS Comput Biol Research Article The role of dopamine in behaviour and decision-making is often cast in terms of reinforcement learning and optimal decision theory. Here, we present an alternative view that frames the physiology of dopamine in terms of Bayes-optimal behaviour. In this account, dopamine controls the precision or salience of (external or internal) cues that engender action. In other words, dopamine balances bottom-up sensory information and top-down prior beliefs when making hierarchical inferences (predictions) about cues that have affordance. In this paper, we focus on the consequences of changing tonic levels of dopamine firing using simulations of cued sequential movements. Crucially, the predictions driving movements are based upon a hierarchical generative model that infers the context in which movements are made. This means that we can confuse agents by changing the context (order) in which cues are presented. These simulations provide a (Bayes-optimal) model of contextual uncertainty and set switching that can be quantified in terms of behavioural and electrophysiological responses. Furthermore, one can simulate dopaminergic lesions (by changing the precision of prediction errors) to produce pathological behaviours that are reminiscent of those seen in neurological disorders such as Parkinson's disease. We use these simulations to demonstrate how a single functional role for dopamine at the synaptic level can manifest in different ways at the behavioural level. Public Library of Science 2012-01-05 /pmc/articles/PMC3252266/ /pubmed/22241972 http://dx.doi.org/10.1371/journal.pcbi.1002327 Text en Friston et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Friston, Karl J. Shiner, Tamara FitzGerald, Thomas Galea, Joseph M. Adams, Rick Brown, Harriet Dolan, Raymond J. Moran, Rosalyn Stephan, Klaas Enno Bestmann, Sven Dopamine, Affordance and Active Inference |
title | Dopamine, Affordance and Active Inference |
title_full | Dopamine, Affordance and Active Inference |
title_fullStr | Dopamine, Affordance and Active Inference |
title_full_unstemmed | Dopamine, Affordance and Active Inference |
title_short | Dopamine, Affordance and Active Inference |
title_sort | dopamine, affordance and active inference |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3252266/ https://www.ncbi.nlm.nih.gov/pubmed/22241972 http://dx.doi.org/10.1371/journal.pcbi.1002327 |
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