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Leek, EC, d'Avossa, G, Tainturier, M-J, Roberts, DJ, Yuen, SL, Hu, M and Rafal, R (2012) Impaired integration of object knowledge and visual input in a case of ventral simultanagnosia with bilateral damage to area V4. COGNITIVE NEUROPSYCHOLOGY, 29 (7-8). pp. 569-583. ISSN 0264-3294
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Abstract
In this study we report some of the first evidence showing how brain-damage can affect the underlying processes that support the integration of sensory input and prior
knowledge during the visual perception of shape. We report the case of patient MT with an acquired ventral simultanagnosia following posterior occipito-temporal
lesions encompassing V4 bilaterally. Despite showing normal object recognition for single items, and intact low-level vision, MT was impaired in object identification
with overlapping figures displays. Task performance was modulated by familiarity: unlike controls, MT was faster with overlapping displays of abstract shapes than
common objects. His performance with overlapping common object displays was also influenced by both the semantic relatedness and visual similarity of the display items.
These findings challenge claims that visual perception is driven solely by feed forward mechanisms, and show how brain-damage can selectively impair high-level
perceptual processes supporting the integration of stored knowledge and visual sensory input.
| Item Type: | Article |
|---|---|
| Additional Information: | This is an Accepted Manuscript of an article published by Taylor & Francis in Cognitive Neuropsychology in 2012, available online: http://dx.doi.org/10.1080/02643294.2012.752724 |
| Uncontrolled Keywords: | 1109 Neurosciences, 1701 Psychology, 1702 Cognitive Science |
| Subjects: | R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry |
| Divisions: | Natural Sciences & Psychology (closed 31 Aug 19) |
| Publisher: | PSYCHOLOGY PRESS |
| Related URLs: | |
| Date Deposited: | 27 Feb 2015 11:37 |
| Last Modified: | 04 Sep 2021 14:39 |
| DOI or ID number: | 10.1080/02643294.2012.752724 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/478 |
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