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Patterns of Cerebellar Connectivity with Intrinsic Connectivity Networks in Autism Spectrum Disorders / H. M. BEDNARZ in Journal of Autism and Developmental Disorders, 49-11 (November 2019)
[article]
Titre : Patterns of Cerebellar Connectivity with Intrinsic Connectivity Networks in Autism Spectrum Disorders Type de document : Texte imprimé et/ou numérique Auteurs : H. M. BEDNARZ, Auteur ; R. K. KANA, Auteur Article en page(s) : p.4498-4514 Langues : Anglais (eng) Mots-clés : Autism Cerebellum Default mode Executive Salience Index. décimale : PER Périodiques Résumé : There is growing evidence of altered connectivity in autism spectrum disorders (ASD) between the cerebellum and cortex. Three intrinsic connectivity networks (ICNs) are especially important to cognitive processing in ASD: the default mode network (DMN), executive control network (ECN), and salience networks (SNs). The goal of this study was to compare resting-state functional connectivity between the cerebellum and the DMN, ECN, and SN in ASD and typically developing children (n = 74, ages 7-12 years). Children with ASD showed stronger connectivity between the ventral DMN and left cerebellar lobules I-IV. No meaningful relationships were observed between ICN-cerebellar functional connectivity and ASD symptoms. These results suggest that the cerebellum contributes to altered network connectivity in ASD. En ligne : http://dx.doi.org/10.1007/s10803-019-04168-w Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=408
in Journal of Autism and Developmental Disorders > 49-11 (November 2019) . - p.4498-4514[article] Patterns of Cerebellar Connectivity with Intrinsic Connectivity Networks in Autism Spectrum Disorders [Texte imprimé et/ou numérique] / H. M. BEDNARZ, Auteur ; R. K. KANA, Auteur . - p.4498-4514.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 49-11 (November 2019) . - p.4498-4514
Mots-clés : Autism Cerebellum Default mode Executive Salience Index. décimale : PER Périodiques Résumé : There is growing evidence of altered connectivity in autism spectrum disorders (ASD) between the cerebellum and cortex. Three intrinsic connectivity networks (ICNs) are especially important to cognitive processing in ASD: the default mode network (DMN), executive control network (ECN), and salience networks (SNs). The goal of this study was to compare resting-state functional connectivity between the cerebellum and the DMN, ECN, and SN in ASD and typically developing children (n = 74, ages 7-12 years). Children with ASD showed stronger connectivity between the ventral DMN and left cerebellar lobules I-IV. No meaningful relationships were observed between ICN-cerebellar functional connectivity and ASD symptoms. These results suggest that the cerebellum contributes to altered network connectivity in ASD. En ligne : http://dx.doi.org/10.1007/s10803-019-04168-w Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=408 Effects of age on the hippocampus and verbal memory in adults with autism spectrum disorder: Longitudinal versus cross-sectional findings / Broc A. PAGNI in Autism Research, 15-10 (October 2022)
[article]
Titre : Effects of age on the hippocampus and verbal memory in adults with autism spectrum disorder: Longitudinal versus cross-sectional findings Type de document : Texte imprimé et/ou numérique Auteurs : Broc A. PAGNI, Auteur ; Melissa J. M. WALSH, Auteur ; Edward OFORI, Auteur ; Kewei CHEN, Auteur ; Georgia SULLIVAN, Auteur ; Jocelyn ALVAR, Auteur ; Leanna MONAHAN, Auteur ; Nicolas GUERITHAULT, Auteur ; Shanna DELANEY, Auteur ; B. Blair BRADEN, Auteur Article en page(s) : p.1810-1823 Langues : Anglais (eng) Mots-clés : aging/ASD in adults executive functioning hippocampus longitudinal data analysis magnetic resonance imaging - structural memory neuroimaging Index. décimale : PER Périodiques Résumé : Research studying aging in adults with autism spectrum disorder (ASD) is growing, but longitudinal work is needed. Autistic adults have increased risk of dementia, altered hippocampal volumes and fornix integrity, and verbal memory difficulties compared with neurotypical (NT) adults. This study examined longitudinal aging in middle-age adults with ASD versus a matched NT group, and compared findings with cross-sectional age effects across a broad adult age range. Participants were 194 adults with (n = 106; 74 male) and without (n = 88; 52 male) ASD, ages 18-71. Participants (n = 45; 40-70 age range) with two visits (2-3 years apart) were included in a longitudinal analysis. Hippocampal volume, fornix fractional anisotropy (FA), and verbal memory were measured via T1-weighted MRI, diffusion tensor imaging, and the Rey Auditory Verbal Learning Test, respectively. Longitudinal mixed models were used for hippocampal system variables and reliable change index categories were used for Auditory Verbal Learning Test analyses. Multivariate regression was used for cross-sectional analyses. Middle-age adults with ASD had greater longitudinal hippocampal volume loss and were more likely to show clinically meaningful decline in short-term memory, compared with NT. In contrast, cross-sectional associations between increasing age and worsening short-term memory were identified in NT, but not autistic adults. Reduced fornix FA and long-term memory in ASD were found across the broad cross-sectional age range. These preliminary longitudinal findings suggest accelerated hippocampal volume loss in ASD and slightly higher rates of clinically-meaningful decline in verbal short-term memory. Contradictory cross-sectional and longitudinal results underscore the importance of longitudinal aging research in autistic adults. LAY SUMMARY: Autistic adults have increased risk of dementia, differences in brain memory structures, and difficulty with memory compared with neurotypical (NT) adults. However, there are no publications that follow the same middle-age autistic adults over time to see how their brain and memory change. Our preliminary findings in a small middle-age autism sample suggest a key memory brain structure, the hippocampus, may shrink faster over 2-3 years compared with NT, and short-term memory may become more challenging for some. Across a broad adult range, autistic adults also had reduced integrity of connections to the hippocampus and greater challenges with long-term memory. In our larger sample across a broad age range, the results did not hint at this aforementioned pattern of accelerated aging. This underscores the importance of more aging research in autism, and especially research where people are followed over time. En ligne : http://dx.doi.org/10.1002/aur.2797 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=488
in Autism Research > 15-10 (October 2022) . - p.1810-1823[article] Effects of age on the hippocampus and verbal memory in adults with autism spectrum disorder: Longitudinal versus cross-sectional findings [Texte imprimé et/ou numérique] / Broc A. PAGNI, Auteur ; Melissa J. M. WALSH, Auteur ; Edward OFORI, Auteur ; Kewei CHEN, Auteur ; Georgia SULLIVAN, Auteur ; Jocelyn ALVAR, Auteur ; Leanna MONAHAN, Auteur ; Nicolas GUERITHAULT, Auteur ; Shanna DELANEY, Auteur ; B. Blair BRADEN, Auteur . - p.1810-1823.
Langues : Anglais (eng)
in Autism Research > 15-10 (October 2022) . - p.1810-1823
Mots-clés : aging/ASD in adults executive functioning hippocampus longitudinal data analysis magnetic resonance imaging - structural memory neuroimaging Index. décimale : PER Périodiques Résumé : Research studying aging in adults with autism spectrum disorder (ASD) is growing, but longitudinal work is needed. Autistic adults have increased risk of dementia, altered hippocampal volumes and fornix integrity, and verbal memory difficulties compared with neurotypical (NT) adults. This study examined longitudinal aging in middle-age adults with ASD versus a matched NT group, and compared findings with cross-sectional age effects across a broad adult age range. Participants were 194 adults with (n = 106; 74 male) and without (n = 88; 52 male) ASD, ages 18-71. Participants (n = 45; 40-70 age range) with two visits (2-3 years apart) were included in a longitudinal analysis. Hippocampal volume, fornix fractional anisotropy (FA), and verbal memory were measured via T1-weighted MRI, diffusion tensor imaging, and the Rey Auditory Verbal Learning Test, respectively. Longitudinal mixed models were used for hippocampal system variables and reliable change index categories were used for Auditory Verbal Learning Test analyses. Multivariate regression was used for cross-sectional analyses. Middle-age adults with ASD had greater longitudinal hippocampal volume loss and were more likely to show clinically meaningful decline in short-term memory, compared with NT. In contrast, cross-sectional associations between increasing age and worsening short-term memory were identified in NT, but not autistic adults. Reduced fornix FA and long-term memory in ASD were found across the broad cross-sectional age range. These preliminary longitudinal findings suggest accelerated hippocampal volume loss in ASD and slightly higher rates of clinically-meaningful decline in verbal short-term memory. Contradictory cross-sectional and longitudinal results underscore the importance of longitudinal aging research in autistic adults. LAY SUMMARY: Autistic adults have increased risk of dementia, differences in brain memory structures, and difficulty with memory compared with neurotypical (NT) adults. However, there are no publications that follow the same middle-age autistic adults over time to see how their brain and memory change. Our preliminary findings in a small middle-age autism sample suggest a key memory brain structure, the hippocampus, may shrink faster over 2-3 years compared with NT, and short-term memory may become more challenging for some. Across a broad adult range, autistic adults also had reduced integrity of connections to the hippocampus and greater challenges with long-term memory. In our larger sample across a broad age range, the results did not hint at this aforementioned pattern of accelerated aging. This underscores the importance of more aging research in autism, and especially research where people are followed over time. En ligne : http://dx.doi.org/10.1002/aur.2797 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=488