Annual Research Review: Growth connectomics – the organization and reorganization of brain networks during normal and abnormal development / Petra E. VERTES in Journal of Child Psychology and Psychiatry, 56-3 (March 2015)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 56-3 (March 2015) . - p.299-320 Titre : Annual Research Review: Growth connectomics – the organization and reorganization of brain networks during normal and abnormal development Type de document : Texte imprimé et/ou numérique Auteurs : Petra E. VERTES, Auteur ; Edward T. BULLMORE, Auteur Article en page(s) : p.299-320 Langues : Anglais (eng) Mots-clés : Brain networks  connectomics  development  cognitive change  neurodevelopmental disorders Index. décimale : PER Périodiques Résumé : Background We first give a brief introduction to graph theoretical analysis and its application to the study of brain network topology or connectomics. Within this framework, we review the existing empirical data on developmental changes in brain network organization across a range of experimental modalities (including structural and functional MRI, diffusion tensor imaging, magnetoencephalography and electroencephalography in humans). Synthesis We discuss preliminary evidence and current hypotheses for how the emergence of network properties correlates with concomitant cognitive and behavioural changes associated with development. We highlight some of the technical and conceptual challenges to be addressed by future developments in this rapidly moving field. Given the parallels previously discovered between neural systems across species and over a range of spatial scales, we also review some recent advances in developmental network studies at the cellular scale. We highlight the opportunities presented by such studies and how they may complement neuroimaging in advancing our understanding of brain development. Finally, we note that many brain and mind disorders are thought to be neurodevelopmental in origin and that charting the trajectory of brain network changes associated with healthy development also sets the stage for understanding abnormal network development. Conclusions We therefore briefly review the clinical relevance of network metrics as potential diagnostic markers and some recent efforts in computational modelling of brain networks which might contribute to a more mechanistic understanding of neurodevelopmental disorders in future. En ligne : http://dx.doi.org/10.1111/jcpp.12365 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=260 [article] Annual Research Review: Growth connectomics – the organization and reorganization of brain networks during normal and abnormal development [Texte imprimé et/ou numérique] / Petra E. VERTES, Auteur ; Edward T. BULLMORE, Auteur . - p.299-320. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 56-3 (March 2015) . - p.299-320 Mots-clés : Brain networks  connectomics  development  cognitive change  neurodevelopmental disorders Index. décimale : PER Périodiques Résumé : Background We first give a brief introduction to graph theoretical analysis and its application to the study of brain network topology or connectomics. Within this framework, we review the existing empirical data on developmental changes in brain network organization across a range of experimental modalities (including structural and functional MRI, diffusion tensor imaging, magnetoencephalography and electroencephalography in humans). Synthesis We discuss preliminary evidence and current hypotheses for how the emergence of network properties correlates with concomitant cognitive and behavioural changes associated with development. We highlight some of the technical and conceptual challenges to be addressed by future developments in this rapidly moving field. Given the parallels previously discovered between neural systems across species and over a range of spatial scales, we also review some recent advances in developmental network studies at the cellular scale. We highlight the opportunities presented by such studies and how they may complement neuroimaging in advancing our understanding of brain development. Finally, we note that many brain and mind disorders are thought to be neurodevelopmental in origin and that charting the trajectory of brain network changes associated with healthy development also sets the stage for understanding abnormal network development. Conclusions We therefore briefly review the clinical relevance of network metrics as potential diagnostic markers and some recent efforts in computational modelling of brain networks which might contribute to a more mechanistic understanding of neurodevelopmental disorders in future. En ligne : http://dx.doi.org/10.1111/jcpp.12365 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=260

Failure to deactivate the default mode network indicates a possible endophenotype of autism / Michael D. SPENCER in Molecular Autism, (December 2012)  

Public ISBD [article]  inMolecular Autism > (December 2012) . - 9 p. Titre : Failure to deactivate the default mode network indicates a possible endophenotype of autism Type de document : Texte imprimé et/ou numérique Auteurs : Michael D. SPENCER, Auteur ; Lindsay CHURA, Auteur ; Rosemary HOLT, Auteur ; John SUCKLING, Auteur ; Andrew J. CALDER, Auteur ; Edward T. BULLMORE, Auteur ; Simon BARON-COHEN, Auteur Année de publication : 2012 Article en page(s) : 9 p. Langues : Anglais (eng) Mots-clés : Autism  Default mode network  Functional MRI  Endophenotype Index. décimale : PER Périodiques Résumé : BACKGROUND:Reduced activity during cognitively demanding tasks has been reported in the default mode network in typically developing controls and individuals with autism. However, no study has investigated the default mode network (DMN) in first-degree relatives of those with autism (such as siblings) and it is not known whether atypical activation of the DMN is specific to autism or whether it is also present in unaffected relatives. Here we use functional magnetic resonance imaging to investigate the pattern of task-related deactivation during completion of a visual search task, the Embedded Figures Task, in teenagers with autism, their unaffected siblings and typically developing controls.FINDINGS:We identified striking reductions in deactivation during the Embedded Figures Task in unaffected siblings compared to controls in brain regions corresponding to the default mode network. Adolescents with autism and their unaffected siblings similarly failed to deactivate regions, including posterior cingulate and bilateral inferior parietal cortex.CONCLUSIONS:This suggests that a failure to deactivate these regions is a functional endophenotype of autism, related to familial risk for the condition shared between individuals with autism and their siblings. En ligne : http://dx.doi.org/10.1186/2040-2392-3-15 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202 [article] Failure to deactivate the default mode network indicates a possible endophenotype of autism [Texte imprimé et/ou numérique] / Michael D. SPENCER, Auteur ; Lindsay CHURA, Auteur ; Rosemary HOLT, Auteur ; John SUCKLING, Auteur ; Andrew J. CALDER, Auteur ; Edward T. BULLMORE, Auteur ; Simon BARON-COHEN, Auteur . - 2012 . - 9 p. Langues : Anglais (eng) in Molecular Autism > (December 2012) . - 9 p. Mots-clés : Autism  Default mode network  Functional MRI  Endophenotype Index. décimale : PER Périodiques Résumé : BACKGROUND:Reduced activity during cognitively demanding tasks has been reported in the default mode network in typically developing controls and individuals with autism. However, no study has investigated the default mode network (DMN) in first-degree relatives of those with autism (such as siblings) and it is not known whether atypical activation of the DMN is specific to autism or whether it is also present in unaffected relatives. Here we use functional magnetic resonance imaging to investigate the pattern of task-related deactivation during completion of a visual search task, the Embedded Figures Task, in teenagers with autism, their unaffected siblings and typically developing controls.FINDINGS:We identified striking reductions in deactivation during the Embedded Figures Task in unaffected siblings compared to controls in brain regions corresponding to the default mode network. Adolescents with autism and their unaffected siblings similarly failed to deactivate regions, including posterior cingulate and bilateral inferior parietal cortex.CONCLUSIONS:This suggests that a failure to deactivate these regions is a functional endophenotype of autism, related to familial risk for the condition shared between individuals with autism and their siblings. En ligne : http://dx.doi.org/10.1186/2040-2392-3-15 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202

Neural self-representation in autistic women and association with 'compensatory camouflaging' / Meng-Chuan LAI in Autism, 23-5 (July 2019)  

Public ISBD [article]  inAutism > 23-5 (July 2019) . - p.1210-1223 Titre : Neural self-representation in autistic women and association with 'compensatory camouflaging' Type de document : Texte imprimé et/ou numérique Auteurs : Meng-Chuan LAI, Auteur ; M. V. LOMBARDO, Auteur ; Bhismadev CHAKRABARTI, Auteur ; A. N. RUIGROK, Auteur ; Edward T. BULLMORE, Auteur ; J. SUCKLING, Auteur ; Bonnie AUYEUNG, Auteur ; Francesca HAPPE, Auteur ; P. SZATMARI, Auteur ; Simon BARON-COHEN, Auteur Article en page(s) : p.1210-1223 Langues : Anglais (eng) Mots-clés : adult  autism  camouflaging  compensation  functional magnetic resonance imaging  gender  heterogeneity  mentalizing  self  sex Index. décimale : PER Périodiques Résumé : Prior work has revealed sex/gender-dependent autistic characteristics across behavioural and neural/biological domains. It remains unclear whether and how neural sex/gender differences are related to behavioural sex/gender differences in autism. Here, we examined whether atypical neural responses during mentalizing and self-representation are sex/gender-dependent in autistic adults and explored whether 'camouflaging' (acting as if behaviourally neurotypical) is associated with sex/gender-dependent neural responses. In total, N = 119 adults (33 typically developing males, 29 autistic males, 29 typically developing females and 28 autistic females) participated in a task-related functional magnetic resonance imaging paradigm to assess neural activation within right temporo-parietal junction and ventromedial prefrontal cortex during mentalizing and self-representation. Camouflaging in autism was quantified as the discrepancy between extrinsic behaviour in social-interpersonal contexts and intrinsic status. While autistic men showed hypoactive right temporo-parietal junction mentalizing and ventromedial prefrontal cortex self-representation responses compared to typically developing men, such neural responses in autistic women were not different from typically developing women. In autistic women only, increasing camouflaging was associated with heightened ventromedial prefrontal cortex self-representation response. There is a lack of impaired neural self-representation and mentalizing in autistic women compared to typically developing women. Camouflaging is heightened in autistic women and may relate to neural self-representation response. These results reveal brain-behaviour relations that help explain sex/gender-heterogeneity in social brain function in autism. En ligne : http://dx.doi.org/10.1177/1362361318807159 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=401 [article] Neural self-representation in autistic women and association with 'compensatory camouflaging' [Texte imprimé et/ou numérique] / Meng-Chuan LAI, Auteur ; M. V. LOMBARDO, Auteur ; Bhismadev CHAKRABARTI, Auteur ; A. N. RUIGROK, Auteur ; Edward T. BULLMORE, Auteur ; J. SUCKLING, Auteur ; Bonnie AUYEUNG, Auteur ; Francesca HAPPE, Auteur ; P. SZATMARI, Auteur ; Simon BARON-COHEN, Auteur . - p.1210-1223. Langues : Anglais (eng) in Autism > 23-5 (July 2019) . - p.1210-1223 Mots-clés : adult  autism  camouflaging  compensation  functional magnetic resonance imaging  gender  heterogeneity  mentalizing  self  sex Index. décimale : PER Périodiques Résumé : Prior work has revealed sex/gender-dependent autistic characteristics across behavioural and neural/biological domains. It remains unclear whether and how neural sex/gender differences are related to behavioural sex/gender differences in autism. Here, we examined whether atypical neural responses during mentalizing and self-representation are sex/gender-dependent in autistic adults and explored whether 'camouflaging' (acting as if behaviourally neurotypical) is associated with sex/gender-dependent neural responses. In total, N = 119 adults (33 typically developing males, 29 autistic males, 29 typically developing females and 28 autistic females) participated in a task-related functional magnetic resonance imaging paradigm to assess neural activation within right temporo-parietal junction and ventromedial prefrontal cortex during mentalizing and self-representation. Camouflaging in autism was quantified as the discrepancy between extrinsic behaviour in social-interpersonal contexts and intrinsic status. While autistic men showed hypoactive right temporo-parietal junction mentalizing and ventromedial prefrontal cortex self-representation responses compared to typically developing men, such neural responses in autistic women were not different from typically developing women. In autistic women only, increasing camouflaging was associated with heightened ventromedial prefrontal cortex self-representation response. There is a lack of impaired neural self-representation and mentalizing in autistic women compared to typically developing women. Camouflaging is heightened in autistic women and may relate to neural self-representation response. These results reveal brain-behaviour relations that help explain sex/gender-heterogeneity in social brain function in autism. En ligne : http://dx.doi.org/10.1177/1362361318807159 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=401

Psychological Correlates of Handedness and Corpus Callosum Asymmetry in Autism: The left Hemisphere Dysfunction Theory Revisited / Dorothea L. FLORIS in Journal of Autism and Developmental Disorders, 43-8 (August 2013)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 43-8 (August 2013) . - p.1758-1772 Titre : Psychological Correlates of Handedness and Corpus Callosum Asymmetry in Autism: The left Hemisphere Dysfunction Theory Revisited Type de document : Texte imprimé et/ou numérique Auteurs : Dorothea L. FLORIS, Auteur ; Lindsay R. CHURA, Auteur ; Rosemary J. HOLT, Auteur ; John SUCKLING, Auteur ; Edward T. BULLMORE, Auteur ; Simon BARON-COHEN, Auteur ; Michael D. SPENCER, Auteur Article en page(s) : p.1758-1772 Langues : Anglais (eng) Mots-clés : Autism  Corpus callosum  Handedness  Asymmetry  Lateralization  Broader autism phenotype Index. décimale : PER Périodiques Résumé : Rightward cerebral lateralization has been suggested to be involved in the neuropathology of autism spectrum conditions. We investigated functional and neuroanatomical asymmetry, in terms of handedness and corpus callosum measurements in male adolescents with autism, their unaffected siblings and controls, and their associations with executive dysfunction and symptom severity. Adolescents with autism did not differ from controls in functional asymmetry, but neuroanatomically showed the expected pattern of stronger rightward lateralization in the posterior and anterior midbody based on their hand-preference. Measures of symptom severity were related to rightward asymmetry in three subregions (splenium, posterior midbody and rostral body). We found the opposite pattern for the isthmus and rostrum with better cognitive and less severe clinical scores associated with rightward lateralization. En ligne : http://dx.doi.org/10.1007/s10803-012-1720-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=205 [article] Psychological Correlates of Handedness and Corpus Callosum Asymmetry in Autism: The left Hemisphere Dysfunction Theory Revisited [Texte imprimé et/ou numérique] / Dorothea L. FLORIS, Auteur ; Lindsay R. CHURA, Auteur ; Rosemary J. HOLT, Auteur ; John SUCKLING, Auteur ; Edward T. BULLMORE, Auteur ; Simon BARON-COHEN, Auteur ; Michael D. SPENCER, Auteur . - p.1758-1772. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 43-8 (August 2013) . - p.1758-1772 Mots-clés : Autism  Corpus callosum  Handedness  Asymmetry  Lateralization  Broader autism phenotype Index. décimale : PER Périodiques Résumé : Rightward cerebral lateralization has been suggested to be involved in the neuropathology of autism spectrum conditions. We investigated functional and neuroanatomical asymmetry, in terms of handedness and corpus callosum measurements in male adolescents with autism, their unaffected siblings and controls, and their associations with executive dysfunction and symptom severity. Adolescents with autism did not differ from controls in functional asymmetry, but neuroanatomically showed the expected pattern of stronger rightward lateralization in the posterior and anterior midbody based on their hand-preference. Measures of symptom severity were related to rightward asymmetry in three subregions (splenium, posterior midbody and rostral body). We found the opposite pattern for the isthmus and rostrum with better cognitive and less severe clinical scores associated with rightward lateralization. En ligne : http://dx.doi.org/10.1007/s10803-012-1720-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=205

Resilient functioning is associated with altered structural brain network topology in adolescents exposed to childhood adversity / Edward T. BULLMORE ; Raymond J. DOLAN ; Peter FONAGY ; Nadia GONZÁLEZ-GARCÍA ; Ian GOODYER ; Peter B. JONES ; Sol LIM ; Laura MORENO-LÓPEZ ; Rafael ROMERO-GARCIA ; Samantha N. SALLIE ; Maximilian SCHEUPLEIN ; Franti?ek VÁ?A ; Kirstie J. WHITAKER ; Anne-Laura VAN HARMELEN in Development and Psychopathology, 35-5 (December 2023)  

Public ISBD [article]  inDevelopment and Psychopathology > 35-5 (December 2023) . - p.2253-2263 Titre : Resilient functioning is associated with altered structural brain network topology in adolescents exposed to childhood adversity Type de document : Texte imprimé et/ou numérique Auteurs : Edward T. BULLMORE, Auteur ; Raymond J. DOLAN, Auteur ; Peter FONAGY, Auteur ; Nadia GONZÁLEZ-GARCÍA, Auteur ; Ian GOODYER, Auteur ; Peter B. JONES, Auteur ; Sol LIM, Auteur ; Laura MORENO-LÓPEZ, Auteur ; Rafael ROMERO-GARCIA, Auteur ; Samantha N. SALLIE, Auteur ; Maximilian SCHEUPLEIN, Auteur ; Franti?ek VÁ?A, Auteur ; Kirstie J. WHITAKER, Auteur ; Anne-Laura VAN HARMELEN, Auteur Article en page(s) : p.2253-2263 Mots-clés : adolescence  brain networks  childhood adversity  resilience  structural covariance Index. décimale : PER Périodiques Résumé : Childhood adversity is one of the strongest predictors of adolescent mental illness. Therefore, it is critical that the mechanisms that aid resilient functioning in individuals exposed to childhood adversity are better understood. Here, we examined whether resilient functioning was related to structural brain network topology. We quantified resilient functioning at the individual level as psychosocial functioning adjusted for the severity of childhood adversity in a large sample of adolescents (N = 2406, aged 14?24). Next, we examined nodal degree (the number of connections that brain regions have in a network) using brain-wide cortical thickness measures in a representative subset (N = 275) using a sliding window approach. We found that higher resilient functioning was associated with lower nodal degree of multiple regions including the dorsolateral prefrontal cortex, the medial prefrontal cortex, and the posterior superior temporal sulcus (z > 1.645). During adolescence, decreases in nodal degree are thought to reflect a normative developmental process that is part of the extensive remodeling of structural brain network topology. Prior findings in this sample showed that decreased nodal degree was associated with age, as such our findings of negative associations between nodal degree and resilient functioning may therefore potentially resemble a more mature structural network configuration in individuals with higher resilient functioning. En ligne : https://dx.doi.org/10.1017/S0954579423000901 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=519 [article] Resilient functioning is associated with altered structural brain network topology in adolescents exposed to childhood adversity [Texte imprimé et/ou numérique] / Edward T. BULLMORE, Auteur ; Raymond J. DOLAN, Auteur ; Peter FONAGY, Auteur ; Nadia GONZÁLEZ-GARCÍA, Auteur ; Ian GOODYER, Auteur ; Peter B. JONES, Auteur ; Sol LIM, Auteur ; Laura MORENO-LÓPEZ, Auteur ; Rafael ROMERO-GARCIA, Auteur ; Samantha N. SALLIE, Auteur ; Maximilian SCHEUPLEIN, Auteur ; Franti?ek VÁ?A, Auteur ; Kirstie J. WHITAKER, Auteur ; Anne-Laura VAN HARMELEN, Auteur . - p.2253-2263. in Development and Psychopathology > 35-5 (December 2023) . - p.2253-2263 Mots-clés : adolescence  brain networks  childhood adversity  resilience  structural covariance Index. décimale : PER Périodiques Résumé : Childhood adversity is one of the strongest predictors of adolescent mental illness. Therefore, it is critical that the mechanisms that aid resilient functioning in individuals exposed to childhood adversity are better understood. Here, we examined whether resilient functioning was related to structural brain network topology. We quantified resilient functioning at the individual level as psychosocial functioning adjusted for the severity of childhood adversity in a large sample of adolescents (N = 2406, aged 14?24). Next, we examined nodal degree (the number of connections that brain regions have in a network) using brain-wide cortical thickness measures in a representative subset (N = 275) using a sliding window approach. We found that higher resilient functioning was associated with lower nodal degree of multiple regions including the dorsolateral prefrontal cortex, the medial prefrontal cortex, and the posterior superior temporal sulcus (z > 1.645). During adolescence, decreases in nodal degree are thought to reflect a normative developmental process that is part of the extensive remodeling of structural brain network topology. Prior findings in this sample showed that decreased nodal degree was associated with age, as such our findings of negative associations between nodal degree and resilient functioning may therefore potentially resemble a more mature structural network configuration in individuals with higher resilient functioning. En ligne : https://dx.doi.org/10.1017/S0954579423000901 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=519

The oxytocin receptor gene predicts brain activity during an emotion recognition task in autism / F. UZEFOVSKY in Molecular Autism, 10 (2019)  

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The role of MT+/V5 during biological motion perception in Asperger Syndrome: An fMRI study / John D. HERRINGTON in Research in Autism Spectrum Disorders, 1-1 (January/March 2007)  

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