Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy
Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiogra...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ramanan, Siddharth [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018transfer abstract |
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| Schlagwörter: |
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| Umfang: |
14 |
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| Übergeordnetes Werk: |
Enthalten in: Do species life history traits explain population responses to roads? A meta-analysis - Rytwinski, Trina ELSEVIER, 2011, a journal devoted to the study of the nervous system and behaviour, Paris |
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| Übergeordnetes Werk: |
volume:106 ; year:2018 ; pages:261-274 ; extent:14 |
| Links: |
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| DOI / URN: |
10.1016/j.cortex.2018.06.016 |
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| Katalog-ID: |
ELV043940625 |
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| 520 | |a Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. | ||
| 520 | |a Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. | ||
| 650 | 7 | |a Angular gyrus |2 Elsevier | |
| 650 | 7 | |a Imagination |2 Elsevier | |
| 650 | 7 | |a Precuneus |2 Elsevier | |
| 650 | 7 | |a Alzheimer's disease |2 Elsevier | |
| 650 | 7 | |a Hippocampus |2 Elsevier | |
| 700 | 1 | |a Alaeddin, Sara |4 oth | |
| 700 | 1 | |a Goldberg, Zoë-lee |4 oth | |
| 700 | 1 | |a Strikwerda-Brown, Cherie |4 oth | |
| 700 | 1 | |a Hodges, John R. |4 oth | |
| 700 | 1 | |a Irish, Muireann |4 oth | |
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10.1016/j.cortex.2018.06.016 doi GBV00000000000662.pica (DE-627)ELV043940625 (ELSEVIER)S0010-9452(18)30202-8 DE-627 ger DE-627 rakwb eng 570 VZ BIODIV DE-30 fid 42.00 bkl Ramanan, Siddharth verfasserin aut Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy 2018transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Angular gyrus Elsevier Imagination Elsevier Precuneus Elsevier Alzheimer's disease Elsevier Hippocampus Elsevier Alaeddin, Sara oth Goldberg, Zoë-lee oth Strikwerda-Brown, Cherie oth Hodges, John R. oth Irish, Muireann oth Enthalten in Elsevier Masson Rytwinski, Trina ELSEVIER Do species life history traits explain population responses to roads? A meta-analysis 2011 a journal devoted to the study of the nervous system and behaviour Paris (DE-627)ELV008365814 volume:106 year:2018 pages:261-274 extent:14 https://doi.org/10.1016/j.cortex.2018.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.00 Biologie: Allgemeines VZ AR 106 2018 261-274 14 |
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10.1016/j.cortex.2018.06.016 doi GBV00000000000662.pica (DE-627)ELV043940625 (ELSEVIER)S0010-9452(18)30202-8 DE-627 ger DE-627 rakwb eng 570 VZ BIODIV DE-30 fid 42.00 bkl Ramanan, Siddharth verfasserin aut Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy 2018transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Angular gyrus Elsevier Imagination Elsevier Precuneus Elsevier Alzheimer's disease Elsevier Hippocampus Elsevier Alaeddin, Sara oth Goldberg, Zoë-lee oth Strikwerda-Brown, Cherie oth Hodges, John R. oth Irish, Muireann oth Enthalten in Elsevier Masson Rytwinski, Trina ELSEVIER Do species life history traits explain population responses to roads? A meta-analysis 2011 a journal devoted to the study of the nervous system and behaviour Paris (DE-627)ELV008365814 volume:106 year:2018 pages:261-274 extent:14 https://doi.org/10.1016/j.cortex.2018.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.00 Biologie: Allgemeines VZ AR 106 2018 261-274 14 |
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10.1016/j.cortex.2018.06.016 doi GBV00000000000662.pica (DE-627)ELV043940625 (ELSEVIER)S0010-9452(18)30202-8 DE-627 ger DE-627 rakwb eng 570 VZ BIODIV DE-30 fid 42.00 bkl Ramanan, Siddharth verfasserin aut Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy 2018transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Angular gyrus Elsevier Imagination Elsevier Precuneus Elsevier Alzheimer's disease Elsevier Hippocampus Elsevier Alaeddin, Sara oth Goldberg, Zoë-lee oth Strikwerda-Brown, Cherie oth Hodges, John R. oth Irish, Muireann oth Enthalten in Elsevier Masson Rytwinski, Trina ELSEVIER Do species life history traits explain population responses to roads? A meta-analysis 2011 a journal devoted to the study of the nervous system and behaviour Paris (DE-627)ELV008365814 volume:106 year:2018 pages:261-274 extent:14 https://doi.org/10.1016/j.cortex.2018.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.00 Biologie: Allgemeines VZ AR 106 2018 261-274 14 |
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10.1016/j.cortex.2018.06.016 doi GBV00000000000662.pica (DE-627)ELV043940625 (ELSEVIER)S0010-9452(18)30202-8 DE-627 ger DE-627 rakwb eng 570 VZ BIODIV DE-30 fid 42.00 bkl Ramanan, Siddharth verfasserin aut Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy 2018transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Angular gyrus Elsevier Imagination Elsevier Precuneus Elsevier Alzheimer's disease Elsevier Hippocampus Elsevier Alaeddin, Sara oth Goldberg, Zoë-lee oth Strikwerda-Brown, Cherie oth Hodges, John R. oth Irish, Muireann oth Enthalten in Elsevier Masson Rytwinski, Trina ELSEVIER Do species life history traits explain population responses to roads? A meta-analysis 2011 a journal devoted to the study of the nervous system and behaviour Paris (DE-627)ELV008365814 volume:106 year:2018 pages:261-274 extent:14 https://doi.org/10.1016/j.cortex.2018.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.00 Biologie: Allgemeines VZ AR 106 2018 261-274 14 |
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10.1016/j.cortex.2018.06.016 doi GBV00000000000662.pica (DE-627)ELV043940625 (ELSEVIER)S0010-9452(18)30202-8 DE-627 ger DE-627 rakwb eng 570 VZ BIODIV DE-30 fid 42.00 bkl Ramanan, Siddharth verfasserin aut Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy 2018transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. Angular gyrus Elsevier Imagination Elsevier Precuneus Elsevier Alzheimer's disease Elsevier Hippocampus Elsevier Alaeddin, Sara oth Goldberg, Zoë-lee oth Strikwerda-Brown, Cherie oth Hodges, John R. oth Irish, Muireann oth Enthalten in Elsevier Masson Rytwinski, Trina ELSEVIER Do species life history traits explain population responses to roads? A meta-analysis 2011 a journal devoted to the study of the nervous system and behaviour Paris (DE-627)ELV008365814 volume:106 year:2018 pages:261-274 extent:14 https://doi.org/10.1016/j.cortex.2018.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.00 Biologie: Allgemeines VZ AR 106 2018 261-274 14 |
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exploring the contribution of visual imagery to scene construction – evidence from posterior cortical atrophy |
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Exploring the contribution of visual imagery to scene construction – Evidence from Posterior Cortical Atrophy |
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Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. |
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Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. |
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Posterior Cortical Atrophy (PCA) is a rare neurodegenerative syndrome characterised by profound visuoperceptual processing disturbances, attributable to focal parieto-occipital cortical atrophy. Despite relative sparing of the medial temporal lobes, converging evidence reveals significant autobiographical memory impairments in this syndrome, underscoring the crucial role of visual imagery for episodic memory processes. The contribution of visual imagery to complex constructive endeavours, however, remains unclear. Here, we investigated the capacity for atemporal scene construction in 5 well-characterised cases of PCA and contrasted their performance with 10 typical amnestic Alzheimer's Disease (AD) and 10 healthy older Control participants. Behavioural data were analysed using case-Control statistics comparing each PCA patient's scene construction scores to the mean scores of AD and Control groups. In keeping with their clinical phenotype, PCA patients demonstrated significant visuoperceptual and episodic memory impairments on standard neuropsychological tasks. Scene construction performance was grossly impaired in PCA, at a level comparable to that observed in the AD group, manifesting in impoverished and spatially fragmented scenes. Structural neuroimaging confirmed prominent grey matter intensity decrease predominantly in posterior cortical regions in PCA, in the absence of frank hippocampal atrophy. Using an a priori motivated region-of-interest approach across all participants, scene construction performance was found to correlate with grey matter intensity in the left angular gyrus, right precuneus, and right hippocampus. This study is the first to reveal compromised scene construction capacity in PCA, extending our understanding of the cognitive profile of this rare syndrome and pointing towards the fundamental contribution of visual imagery to atemporal forms of imagination. |
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