eprintid: 1396467
rev_number: 44
eprint_status: archive
userid: 608
dir: disk0/01/39/64/67
datestamp: 2013-06-16 18:35:56
lastmod: 2021-09-19 23:35:03
status_changed: 2013-06-16 18:35:56
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Brown, H
creators_name: Adams, RA
creators_name: Parees, I
creators_name: Edwards, M
creators_name: Friston, K
title: Active inference, sensory attenuation and illusions
ispublished: pub
divisions: UCL
divisions: B02
divisions: C07
divisions: D07
divisions: F83
divisions: B04
divisions: C05
divisions: F48
note: ©The Author(s) 2013. This article is published with open access at Springerlink.com. This article is made available under the liberal Creative Commons Attribution (CC BY) license. The CC BY license permits commercial and non-commercial re-use of an open access article, as long as the original author and source are properly attributed.
abstract: Active inference provides a simple and neurobiologically plausible account of how action and perception are coupled in producing (Bayes) optimal behaviour. This can be seen most easily as minimising prediction error: we can either change our predictions to explain sensory input through perception. Alternatively, we can actively change sensory input to fulfil our predictions. In active inference, this action is mediated by classical reflex arcs that minimise proprioceptive prediction error created by descending proprioceptive predictions. However, this creates a conflict between action and perception; in that, self-generated movements require predictions to override the sensory evidence that one is not actually moving. However, ignoring sensory evidence means that externally generated sensations will not be perceived. Conversely, attending to (proprioceptive and somatosensory) sensations enables the detection of externally generated events but precludes generation of actions. This conflict can be resolved by attenuating the precision of sensory evidence during movement or, equivalently, attending away from the consequences of self-made acts. We propose that this Bayes optimal withdrawal of precise sensory evidence during movement is the cause of psychophysical sensory attenuation. Furthermore, it explains the force-matching illusion and reproduces empirical results almost exactly. Finally, if attenuation is removed, the force-matching illusion disappears and false (delusional) inferences about agency emerge. This is important, given the negative correlation between sensory attenuation and delusional beliefs in normal subjects-and the reduction in the magnitude of the illusion in schizophrenia. Active inference therefore links the neuromodulatory optimisation of precision to sensory attenuation and illusory phenomena during the attribution of agency in normal subjects. It also provides a functional account of deficits in syndromes characterised by false inference and impaired movement-like schizophrenia and Parkinsonism-syndromes that implicate abnormal modulatory neurotransmission.
date: 2013-06-07
official_url: http://dx.doi.org/10.1007/s10339-013-0571-3
vfaculties: VFBRS
vfaculties: VFBRS
vfaculties: VFBRS
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Journal Article
verified: verified_manual
elements_source: PubMed
elements_id: 877240
doi: 10.1007/s10339-013-0571-3
language_elements: ENG
lyricists_name: Adams, Richard
lyricists_name: Brown, Harriet
lyricists_name: Edwards, Mark
lyricists_name: Friston, Karl
lyricists_id: RAADA06
lyricists_id: HRFEL52
lyricists_id: MJJED67
lyricists_id: KJFRI52
full_text_status: public
publication: Cognitive Processing
issn: 1612-4782
citation:        Brown, H;    Adams, RA;    Parees, I;    Edwards, M;    Friston, K;      (2013)    Active inference, sensory attenuation and illusions.                   Cognitive Processing        10.1007/s10339-013-0571-3 <https://doi.org/10.1007/s10339-013-0571-3>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1396467/1/Brown_Cognitive_Processing.pdf