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The Computational Anatomy of Visual Neglect
| Content Provider | Semantic Scholar |
|---|---|
| Author | Parr, Thomas Friston, Karl J. |
| Copyright Year | 2018 |
| Abstract | Visual neglect is a debilitating neuropsychological phenomenon that has many clinical implications and-in cognitive neuroscience-offers an important lesion deficit model. In this article, we describe a computational model of visual neglect based upon active inference. Our objective is to establish a computational and neurophysiological process theory that can be used to disambiguate among the various causes of this important syndrome; namely, a computational neuropsychology of visual neglect. We introduce a Bayes optimal model based upon Markov decision processes that reproduces the visual searches induced by the line cancellation task (used to characterize visual neglect at the bedside). We then consider 3 distinct ways in which the model could be lesioned to reproduce neuropsychological (visual search) deficits. Crucially, these 3 levels of pathology map nicely onto the neuroanatomy of saccadic eye movements and the systems implicated in visual neglect. |
| Starting Page | 777 |
| Ending Page | 790 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://watermark.silverchair.com/bhx316.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAakwggGlBgkqhkiG9w0BBwagggGWMIIBkgIBADCCAYsGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMJS2RPOuX3SXHlBCTAgEQgIIBXPEPIg8iWaw85xkzWnpjk1NWeL-h3Mk3FekKdvCUC3NoUcuZiiJnFj4Pr975w3Q_uFqjsz6FKLIdecpDuunE5mWzXAMMdJgCqXXTeV0fOvugwBhOpMh25zIUrE0sPfR82ffUEcHQmzTBsTyeDYWSf0ADGEDjcteWNox__8c5dAvgQn6dd3OZsw-yKzXLK6WOT7KkMkQ2E-Rhz_ADlRzub9GqnNBnUQrQon9rH9o8V1C6JBu4JlyZ_dhqfw3N6QKpjq6x6bzfRuplzkxYdYK3UHbKHlrMSsNjLTFqyGQJQ_6sveml-vTNkQKhC1mOPJmEe1wtxzcnUvSVwI5ewUqMSWWVDYWYif4XNpVOOKhUwNAJObMrphrbFffIK8aaDuc4iam7BNesFoB3ucoZZhpk_50_B1m2wAJPC2hhj3JIRvHftF4m6TMZBBDxa9gHkoLwW967GQsRj0kxVY8ucg |
| Alternate Webpage(s) | http://discovery.ucl.ac.uk/10041742/1/bhx316.pdf |
| PubMed reference number | 29190328v1 |
| Alternate Webpage(s) | https://doi.org/10.1093/cercor/bhx316 |
| DOI | 10.1093/cercor/bhx316 |
| Journal | Cerebral cortex |
| Volume Number | 28 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Anatomic structures Arabic numeral 0 Area striata structure Attention deficit hyperactivity disorder Behavior Cognition Disorders Computation (action) DPEP1 gene Disclosure Eye Movements Fascicle - nerve fibers Gradient Inference Movement Neuroanatomy Neuropsychology Neuroscience discipline Note (document) Optic Nerve Glioma, Childhood Patients Phenotype determination Preparation Pulvinar structure Saccades Structure of putamen free energy late nucleophagy neurological system process retrovirus vector LN |
| Content Type | Text |
| Resource Type | Article |
