{"id":468,"date":"2018-04-24T22:35:53","date_gmt":"2018-04-25T01:35:53","guid":{"rendered":"http:\/\/www.cemeai.icmc.usp.br\/Reconnect\/?p=468"},"modified":"2020-07-06T12:48:44","modified_gmt":"2020-07-06T15:48:44","slug":"computational-neuropsychology-and-active-inference","status":"publish","type":"post","link":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/computational-neuropsychology-and-active-inference\/","title":{"rendered":"Computational neuropsychology and active inference"},"content":{"rendered":"<h2><a href=\"https:\/\/www.ucl.ac.uk\/mbphd\/current-students-and-alumni\/parr-thomas\" target=\"_blank\" rel=\"noopener noreferrer\">Thomas Parr<\/a><\/h2>\n<h3>Abstract:<\/h3>\n<p>Recent approaches to theoretical neurobiology assume that the brain possesses a generative model that is used to infer the causes of sensory data. This implies perception is a process of optimising posterior beliefs, while actions represent experiments to disambiguate between perceptual hypotheses. Under this view, neurological and psychiatric syndromes result from \u2018broken\u2019 generative models that represent a poor fit to a patient\u2019s environment. In this talk, I will overview some of our recent work using active inference, as formulated for a Markov decision process, to examine the influence of prior beliefs on behaviour \u2013 with a focus on the active visual system. This enables a quantitative phenotyping of neuropsychological syndromes in which visuospatial exploration is disrupted. In brief, we can express computational lesions (for example, those that underwrite visual neglect) as alterations in the parameters of prior probability distributions. Doing so allows us to quantify the evidence associated with different plausible explanations for pathological behaviour.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thomas Parr Abstract: Recent approaches to theoretical neurobiology assume that the brain possesses a generative model that is used to infer the causes of sensory data. This implies perception is a process of optimising posterior beliefs, while actions represent experiments to disambiguate between perceptual hypotheses. Under this view, neurological and psychiatric syndromes result from \u2018broken\u2019 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-468","post","type-post","status-publish","format-standard","hentry","category-events-workshops"],"rttpg_featured_image_url":null,"rttpg_author":{"display_name":"CeMEAI","author_link":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/author\/cemeai\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/category\/events-workshops\/\" rel=\"category tag\">events-workshops<\/a>","rttpg_excerpt":"Thomas Parr Abstract: Recent approaches to theoretical neurobiology assume that the brain possesses a generative model that is used to infer the causes of sensory data. This implies perception is a process of optimising posterior beliefs, while actions represent experiments to disambiguate between perceptual hypotheses. Under this view, neurological and psychiatric syndromes result from \u2018broken\u2019&hellip;","_links":{"self":[{"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/posts\/468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/comments?post=468"}],"version-history":[{"count":4,"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/posts\/468\/revisions"}],"predecessor-version":[{"id":1041,"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/posts\/468\/revisions\/1041"}],"wp:attachment":[{"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/media?parent=468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/categories?post=468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cemeai.icmc.usp.br\/Reconnect\/wp-json\/wp\/v2\/tags?post=468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}