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Visual imagery deficits in posterior cortical atrophy.

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Title: Visual imagery deficits in posterior cortical atrophy.
Authors: Dietz, Connor D. (AUTHOR), Albonico, Andrea (AUTHOR), Tree, Jeremy J. (AUTHOR), Barton, Jason J. S. (AUTHOR)
Source: Cognitive Neuropsychology. Oct-Dec2023, Vol. 40 Issue 7/8, p351-366. 16p.
Subjects: Cerebral atrophy, Object recognition (Computer vision), Recognition (Psychology), Visual perception, Stroke, Vision disorders
Abstract: Visual imagery has a close overlapping relationship with visual perception. Posterior cortical atrophy (PCA) is a neurodegenerative syndrome marked by early impairments in visuospatial processing and visual object recognition. We asked whether PCA would therefore also be marked by deficits in visual imagery, tested using objective forced-choice questionnaires, and whether imagery deficits would be selective for certain properties. We recruited four patients with PCA and a patient with integrative visual agnosia due to bilateral occipitotemporal strokes for comparison. We administered a test battery probing imagery for object shape, size, colour lightness, hue, upper-case letters, lower-case letters, word shape, letter construction, and faces. All subjects showed significant impairments in visual imagery, with imagery for lower-case letters most likely to be spared. We conclude that PCA subjects can show severe deficits in visual imagery. Further work is needed to establish how frequently this occurs and how early it can be found. [ABSTRACT FROM AUTHOR]
Copyright of Cognitive Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Visual imagery deficits in posterior cortical atrophy.
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  Data: <searchLink fieldCode="AR" term="%22Dietz%2C+Connor+D%2E%22">Dietz, Connor D.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Albonico%2C+Andrea%22">Albonico, Andrea</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tree%2C+Jeremy+J%2E%22">Tree, Jeremy J.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Barton%2C+Jason+J%2E+S%2E%22">Barton, Jason J. S.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Cognitive+Neuropsychology%22">Cognitive Neuropsychology</searchLink>. Oct-Dec2023, Vol. 40 Issue 7/8, p351-366. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Cerebral+atrophy%22">Cerebral atrophy</searchLink><br /><searchLink fieldCode="DE" term="%22Object+recognition+%28Computer+vision%29%22">Object recognition (Computer vision)</searchLink><br /><searchLink fieldCode="DE" term="%22Recognition+%28Psychology%29%22">Recognition (Psychology)</searchLink><br /><searchLink fieldCode="DE" term="%22Visual+perception%22">Visual perception</searchLink><br /><searchLink fieldCode="DE" term="%22Stroke%22">Stroke</searchLink><br /><searchLink fieldCode="DE" term="%22Vision+disorders%22">Vision disorders</searchLink>
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  Data: Visual imagery has a close overlapping relationship with visual perception. Posterior cortical atrophy (PCA) is a neurodegenerative syndrome marked by early impairments in visuospatial processing and visual object recognition. We asked whether PCA would therefore also be marked by deficits in visual imagery, tested using objective forced-choice questionnaires, and whether imagery deficits would be selective for certain properties. We recruited four patients with PCA and a patient with integrative visual agnosia due to bilateral occipitotemporal strokes for comparison. We administered a test battery probing imagery for object shape, size, colour lightness, hue, upper-case letters, lower-case letters, word shape, letter construction, and faces. All subjects showed significant impairments in visual imagery, with imagery for lower-case letters most likely to be spared. We conclude that PCA subjects can show severe deficits in visual imagery. Further work is needed to establish how frequently this occurs and how early it can be found. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Cognitive Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1080/02643294.2024.2346362
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 351
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      – SubjectFull: Cerebral atrophy
        Type: general
      – SubjectFull: Object recognition (Computer vision)
        Type: general
      – SubjectFull: Recognition (Psychology)
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      – SubjectFull: Visual perception
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      – SubjectFull: Vision disorders
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      – TitleFull: Visual imagery deficits in posterior cortical atrophy.
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            NameFull: Tree, Jeremy J.
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            NameFull: Barton, Jason J. S.
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            – D: 01
              M: 10
              Text: Oct-Dec2023
              Type: published
              Y: 2023
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              Value: 7/8
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            – TitleFull: Cognitive Neuropsychology
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