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Hippocampal, basal ganglia and olfactory connectivity contribute to cognitive impairments in Parkinson's disease.

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Title: Hippocampal, basal ganglia and olfactory connectivity contribute to cognitive impairments in Parkinson's disease.
Authors: Wylie, Korey P. (AUTHOR), Kluger, Benzi M. (AUTHOR), Medina, Luis D. (AUTHOR), Holden, Samantha K. (AUTHOR), Kronberg, Eugene (AUTHOR), Tregellas, Jason R. (AUTHOR), Buard, Isabelle (AUTHOR)
Source: European Journal of Neuroscience. Feb2023, Vol. 57 Issue 3, p511-526. 16p. 5 Color Photographs, 1 Diagram, 1 Chart.
Subjects: Parkinson's disease, Basal ganglia, Cognition disorders, Olfactory cortex, Mild cognitive impairment, Smell
Abstract: Cognitive impairment is increasingly recognized as a characteristic feature of Parkinson's disease (PD), yet relatively little is known about its underlying neurobiology. Previous investigations suggest that dementia in PD is associated with subcortical atrophy, but similar studies in PD with mild cognitive impairment have been mixed. Variability in cognitive phenotypes and diversity of PD symptoms suggest that a common neuropathological origin results in a multitude of impacts within the brain. These direct and indirect impacts of disease pathology can be investigated using network analysis. Functional connectivity, for instance, may be more sensitive than atrophy to decline in specific cognitive domains in the PD population. Fifty‐eight participants with PD underwent a neuropsychological test battery and scanning with structural and resting state functional MRI in a comprehensive whole‐brain association analysis. To investigate atrophy as a potential marker of impairment, structural gray matter atrophy was associated with cognitive scores in each cognitive domain using voxel‐based morphometry. To investigate connectivity, large‐scale networks were correlated with voxel time series and associated with cognitive scores using distance covariance. Structural atrophy was not associated with any cognitive domain, with the exception of visuospatial measures in primary sensory and motor cortices. In contrast, functional connectivity was associated with attention, executive function, language, learning and memory, visuospatial, and global cognition in the bilateral hippocampus, left putamen, olfactory cortex, and bilateral anterior temporal poles. These preliminary results suggest that cognitive domain‐specific networks in PD are distinct from each other and could provide a network signature for different cognitive phenotypes. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Neuroscience is the property of Wiley-Blackwell 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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  Label: Title
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  Data: Hippocampal, basal ganglia and olfactory connectivity contribute to cognitive impairments in Parkinson's disease.
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  Data: <searchLink fieldCode="AR" term="%22Wylie%2C+Korey+P%2E%22">Wylie, Korey P.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kluger%2C+Benzi+M%2E%22">Kluger, Benzi M.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Medina%2C+Luis+D%2E%22">Medina, Luis D.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Holden%2C+Samantha+K%2E%22">Holden, Samantha K.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kronberg%2C+Eugene%22">Kronberg, Eugene</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tregellas%2C+Jason+R%2E%22">Tregellas, Jason R.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Buard%2C+Isabelle%22">Buard, Isabelle</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Journal+of+Neuroscience%22">European Journal of Neuroscience</searchLink>. Feb2023, Vol. 57 Issue 3, p511-526. 16p. 5 Color Photographs, 1 Diagram, 1 Chart.
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  Data: <searchLink fieldCode="DE" term="%22Parkinson's+disease%22">Parkinson's disease</searchLink><br /><searchLink fieldCode="DE" term="%22Basal+ganglia%22">Basal ganglia</searchLink><br /><searchLink fieldCode="DE" term="%22Cognition+disorders%22">Cognition disorders</searchLink><br /><searchLink fieldCode="DE" term="%22Olfactory+cortex%22">Olfactory cortex</searchLink><br /><searchLink fieldCode="DE" term="%22Mild+cognitive+impairment%22">Mild cognitive impairment</searchLink><br /><searchLink fieldCode="DE" term="%22Smell%22">Smell</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Cognitive impairment is increasingly recognized as a characteristic feature of Parkinson's disease (PD), yet relatively little is known about its underlying neurobiology. Previous investigations suggest that dementia in PD is associated with subcortical atrophy, but similar studies in PD with mild cognitive impairment have been mixed. Variability in cognitive phenotypes and diversity of PD symptoms suggest that a common neuropathological origin results in a multitude of impacts within the brain. These direct and indirect impacts of disease pathology can be investigated using network analysis. Functional connectivity, for instance, may be more sensitive than atrophy to decline in specific cognitive domains in the PD population. Fifty‐eight participants with PD underwent a neuropsychological test battery and scanning with structural and resting state functional MRI in a comprehensive whole‐brain association analysis. To investigate atrophy as a potential marker of impairment, structural gray matter atrophy was associated with cognitive scores in each cognitive domain using voxel‐based morphometry. To investigate connectivity, large‐scale networks were correlated with voxel time series and associated with cognitive scores using distance covariance. Structural atrophy was not associated with any cognitive domain, with the exception of visuospatial measures in primary sensory and motor cortices. In contrast, functional connectivity was associated with attention, executive function, language, learning and memory, visuospatial, and global cognition in the bilateral hippocampus, left putamen, olfactory cortex, and bilateral anterior temporal poles. These preliminary results suggest that cognitive domain‐specific networks in PD are distinct from each other and could provide a network signature for different cognitive phenotypes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of European Journal of Neuroscience is the property of Wiley-Blackwell 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=161657996
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              Text: Feb2023
              Type: published
              Y: 2023
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