Adaptive behavior in autism: Minimal clinically important differences on the Vineland?II / Christopher H. CHATHAM in Autism Research, 11-2 (February 2018)  

Public ISBD [article]  inAutism Research > 11-2 (February 2018) . - p.270-283 Titre : Adaptive behavior in autism: Minimal clinically important differences on the Vineland?II Type de document : Texte imprimé et/ou numérique Auteurs : Christopher H. CHATHAM, Auteur ; K. I. TAYLOR, Auteur ; Tony CHARMAN, Auteur ; X. Liogier D'ARDHUY, Auteur ; E. EULE, Auteur ; A. FEDELE, Auteur ; A. Y. HARDAN, Auteur ; E. LOTH, Auteur ; L. MURTAGH, Auteur ; M. del Valle RUBIDO, Auteur ; Antonia SAN JOSE CACERES, Auteur ; J. SEVIGNY, Auteur ; L. SIKICH, Auteur ; L. SNYDER, Auteur ; J. E. TILLMANN, Auteur ; Pamela VENTOLA, Auteur ; Karen WALTON-BOWEN, Auteur ; P. P. WANG, Auteur ; T. WILLGOSS, Auteur ; Federico BOLOGNANI, Auteur Année de publication : 2018 Article en page(s) : p.270-283 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Autism Spectrum Disorder (ASD) is associated with persistent impairments in adaptive abilities across multiple domains. These social, personal, and communicative impairments become increasingly pronounced with development, and are present regardless of IQ. The Vineland Adaptive Behavior Scales, Second Edition (Vineland?II) is the most commonly used instrument for quantifying these impairments, but minimal clinically important differences (MCIDs) on Vineland?II scores have not been rigorously established in ASD. We pooled data from several consortia/registries (EU?AIMS LEAP study, ABIDE?I, ABIDE?II, INFOR, Simons Simplex Collection and Autism Treatment Network [ATN]) and clinical investigations and trials (Stanford, Yale, Roche) resulting in a data set of over 9,000 individuals with ASD. Two approaches were used to estimate MCIDs: distribution?based methods and anchor?based methods. Distribution?based MCID [d?MCID] estimates included the standard error of the measurement, as well as one?fifth and one?half of the covariate?adjusted standard deviation (both cross?sectionally and longitudinally). Anchor?based MCID [a?MCID] estimates include the slope of linear regression of clinician ratings of severity on the Vineland?II score, the slope of linear regression of clinician ratings of longitudinal improvement category on Vineland?II change, the Vineland?II change score maximally differentiating clinical impressions of minimal versus no improvement, and equipercentile equating. Across strata, the Vineland?II Adaptive Behavior Composite standardized score MCID estimates range from 2.01 to 3.2 for distribution?based methods, and from 2.42 to 3.75 for sample?size?weighted anchor?based methods. Lower Vineland?II standardized score MCID estimates were observed for younger and more cognitively impaired populations. These MCID estimates enable users of Vineland?II to assess both the statistical and clinical significance of any observed change. Autism Res 2018, 11: 270–283. © 2017 International Society for Autism Research, Wiley Periodicals, Inc. Lay Summary The Vineland Adaptive Behavior Scales (2nd edition; Vineland?II) is the most widely used scale for assessing day?to?day “adaptive” skills. Yet, it is unknown how much Vineland?II scores must change for those changes to be regarded as clinically significant. We pooled data from over 9,000 individuals with ASD to show that changes of 2–3.75 points on the Vineland?II Composite score represent the “minimal clinically?important difference.” These estimates will help evaluate the benefits of potential new treatments for ASD. En ligne : https://doi.org/10.1002/aur.1874 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=334 [article] Adaptive behavior in autism: Minimal clinically important differences on the Vineland?II [Texte imprimé et/ou numérique] / Christopher H. CHATHAM, Auteur ; K. I. TAYLOR, Auteur ; Tony CHARMAN, Auteur ; X. Liogier D'ARDHUY, Auteur ; E. EULE, Auteur ; A. FEDELE, Auteur ; A. Y. HARDAN, Auteur ; E. LOTH, Auteur ; L. MURTAGH, Auteur ; M. del Valle RUBIDO, Auteur ; Antonia SAN JOSE CACERES, Auteur ; J. SEVIGNY, Auteur ; L. SIKICH, Auteur ; L. SNYDER, Auteur ; J. E. TILLMANN, Auteur ; Pamela VENTOLA, Auteur ; Karen WALTON-BOWEN, Auteur ; P. P. WANG, Auteur ; T. WILLGOSS, Auteur ; Federico BOLOGNANI, Auteur . - 2018 . - p.270-283. Langues : Anglais (eng) in Autism Research > 11-2 (February 2018) . - p.270-283 Index. décimale : PER Périodiques Résumé : Autism Spectrum Disorder (ASD) is associated with persistent impairments in adaptive abilities across multiple domains. These social, personal, and communicative impairments become increasingly pronounced with development, and are present regardless of IQ. The Vineland Adaptive Behavior Scales, Second Edition (Vineland?II) is the most commonly used instrument for quantifying these impairments, but minimal clinically important differences (MCIDs) on Vineland?II scores have not been rigorously established in ASD. We pooled data from several consortia/registries (EU?AIMS LEAP study, ABIDE?I, ABIDE?II, INFOR, Simons Simplex Collection and Autism Treatment Network [ATN]) and clinical investigations and trials (Stanford, Yale, Roche) resulting in a data set of over 9,000 individuals with ASD. Two approaches were used to estimate MCIDs: distribution?based methods and anchor?based methods. Distribution?based MCID [d?MCID] estimates included the standard error of the measurement, as well as one?fifth and one?half of the covariate?adjusted standard deviation (both cross?sectionally and longitudinally). Anchor?based MCID [a?MCID] estimates include the slope of linear regression of clinician ratings of severity on the Vineland?II score, the slope of linear regression of clinician ratings of longitudinal improvement category on Vineland?II change, the Vineland?II change score maximally differentiating clinical impressions of minimal versus no improvement, and equipercentile equating. Across strata, the Vineland?II Adaptive Behavior Composite standardized score MCID estimates range from 2.01 to 3.2 for distribution?based methods, and from 2.42 to 3.75 for sample?size?weighted anchor?based methods. Lower Vineland?II standardized score MCID estimates were observed for younger and more cognitively impaired populations. These MCID estimates enable users of Vineland?II to assess both the statistical and clinical significance of any observed change. Autism Res 2018, 11: 270–283. © 2017 International Society for Autism Research, Wiley Periodicals, Inc. Lay Summary The Vineland Adaptive Behavior Scales (2nd edition; Vineland?II) is the most widely used scale for assessing day?to?day “adaptive” skills. Yet, it is unknown how much Vineland?II scores must change for those changes to be regarded as clinically significant. We pooled data from over 9,000 individuals with ASD to show that changes of 2–3.75 points on the Vineland?II Composite score represent the “minimal clinically?important difference.” These estimates will help evaluate the benefits of potential new treatments for ASD. En ligne : https://doi.org/10.1002/aur.1874 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=334

Brief Report: Pilot Study of a Novel Interactive Digital Treatment to Improve Cognitive Control in Children with Autism Spectrum Disorder and Co-occurring ADHD Symptoms / B. E. YERYS in Journal of Autism and Developmental Disorders, 49-4 (April 2019)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 49-4 (April 2019) . - p.1727-1737 Titre : Brief Report: Pilot Study of a Novel Interactive Digital Treatment to Improve Cognitive Control in Children with Autism Spectrum Disorder and Co-occurring ADHD Symptoms Type de document : Texte imprimé et/ou numérique Auteurs : B. E. YERYS, Auteur ; Jennifer R. BERTOLLO, Auteur ; L. KENWORTHY, Auteur ; G. DAWSON, Auteur ; E. J. MARCO, Auteur ; Robert T. SCHULTZ, Auteur ; L. SIKICH, Auteur Article en page(s) : p.1727-1737 Langues : Anglais (eng) Mots-clés : Attention deficit/hyperactivity disorder  Comorbidity  Executive function  Go/No-Go  Inhibition  Neurodevelopmental disorder Index. décimale : PER Périodiques Résumé : The presence of attention deficit/hyperactivity disorder (ADHD) symptoms in children with autism spectrum disorder (ASD) is associated with worse cognitive control. Children with ASD and ADHD often respond poorly to medications, thus we need alternative treatments. We examined the feasibility, acceptability, and preliminary efficacy of Project Evo-a digital treatment. Nineteen children with ASD and co-occurring ADHD symptoms completed this app-based treatment that targets multi-tasking through gameplay versus a comparison educational treatment. Children had a high engagement with both treatments, and parents and children reported high acceptability. Within-group analyses suggest the multi-tasking but not the educational treatment may improve cognitive control. This multi-tasking treatment is feasible, acceptable, and possibly efficacious for cognitive control impairments in children with ASD and ADHD. En ligne : https://dx.doi.org/10.1007/s10803-018-3856-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=388 [article] Brief Report: Pilot Study of a Novel Interactive Digital Treatment to Improve Cognitive Control in Children with Autism Spectrum Disorder and Co-occurring ADHD Symptoms [Texte imprimé et/ou numérique] / B. E. YERYS, Auteur ; Jennifer R. BERTOLLO, Auteur ; L. KENWORTHY, Auteur ; G. DAWSON, Auteur ; E. J. MARCO, Auteur ; Robert T. SCHULTZ, Auteur ; L. SIKICH, Auteur . - p.1727-1737. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 49-4 (April 2019) . - p.1727-1737 Mots-clés : Attention deficit/hyperactivity disorder  Comorbidity  Executive function  Go/No-Go  Inhibition  Neurodevelopmental disorder Index. décimale : PER Périodiques Résumé : The presence of attention deficit/hyperactivity disorder (ADHD) symptoms in children with autism spectrum disorder (ASD) is associated with worse cognitive control. Children with ASD and ADHD often respond poorly to medications, thus we need alternative treatments. We examined the feasibility, acceptability, and preliminary efficacy of Project Evo-a digital treatment. Nineteen children with ASD and co-occurring ADHD symptoms completed this app-based treatment that targets multi-tasking through gameplay versus a comparison educational treatment. Children had a high engagement with both treatments, and parents and children reported high acceptability. Within-group analyses suggest the multi-tasking but not the educational treatment may improve cognitive control. This multi-tasking treatment is feasible, acceptable, and possibly efficacious for cognitive control impairments in children with ASD and ADHD. En ligne : https://dx.doi.org/10.1007/s10803-018-3856-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=388

Pragmatic adaptations of telehealth-delivered caregiver coaching for children with autism in the context of COVID-19: Perspectives from the United States and South Africa / L. FRANZ in Autism, 26-1 (January 2022)  

Public ISBD [article]  inAutism > 26-1 (January 2022) . - p.270-275 Titre : Pragmatic adaptations of telehealth-delivered caregiver coaching for children with autism in the context of COVID-19: Perspectives from the United States and South Africa Type de document : Texte imprimé et/ou numérique Auteurs : L. FRANZ, Auteur ; J. HOWARD, Auteur ; M. VILJOEN, Auteur ; L. SIKICH, Auteur ; Tara CHANDRASEKHAR, Auteur ; S. H. KOLLINS, Auteur ; L. LEE, Auteur ; M. NDLOVU, Auteur ; Maura SABATOS-DEVITO, Auteur ; N. SERIS, Auteur ; N. SHABALALA, Auteur ; M. SPANOS, Auteur ; P. J. DE VRIES, Auteur ; G. DAWSON, Auteur Article en page(s) : p.270-275 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/therapy  Autistic Disorder  Covid-19  Caregivers  Child  Humans  Mentoring  SARS-CoV-2  South Africa  Telemedicine  United States  adaptation  autism spectrum disorder  caregiver coaching  digital divide  telehealth  Research and Development, Akili Interactive, LabCorp, Inc, Roche Pharmaceutical  Company, and Tris Pharma, is a consultant for Apple, Inc., Gerson Lehrman Group,  Guidepoint, Inc, Axial Ventures, Teva Pharmaceutical, and is CEO of DASIO, LLC. She  has received book royalties from Guilford Press, Oxford University Press, and  Springer Nature Press. Howard reports personal fees from Roche. Index. décimale : PER Périodiques Résumé : COVID-19 caused many autism spectrum disorder caregiver-coaching studies to move to telehealth. Telehealth can increase the diversity of people who take part in research. This matters because most autism spectrum disorder studies have included people who have resources, are White, and live in North America and Europe. When study participants are similar, it is hard to understand which interventions can help different types of people who live in different parts of the world. While telehealth may allow more people to take part in research, it needs to "fit" the local context and consider the "digital divide" because many people around the world have no access to computers and the Internet. This short report describes changes to two research studies that include caregiver coaching based on the Early Start Denver Model in the United States and South Africa. We describe how the local context, including technology and Internet access, guided the telehealth approach. By doing so, we highlight ways to make telehealth available to more people around the world. The pandemic can help us understand how telehealth can "fit" diverse places and support high-quality research. It is important that study changes are tracked and we assess how well the changes work. COVID-19 telehealth changes to caregiver coaching can result in new ways to reach more people around the world. En ligne : http://dx.doi.org/10.1177/13623613211022585 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=451 [article] Pragmatic adaptations of telehealth-delivered caregiver coaching for children with autism in the context of COVID-19: Perspectives from the United States and South Africa [Texte imprimé et/ou numérique] / L. FRANZ, Auteur ; J. HOWARD, Auteur ; M. VILJOEN, Auteur ; L. SIKICH, Auteur ; Tara CHANDRASEKHAR, Auteur ; S. H. KOLLINS, Auteur ; L. LEE, Auteur ; M. NDLOVU, Auteur ; Maura SABATOS-DEVITO, Auteur ; N. SERIS, Auteur ; N. SHABALALA, Auteur ; M. SPANOS, Auteur ; P. J. DE VRIES, Auteur ; G. DAWSON, Auteur . - p.270-275. Langues : Anglais (eng) in Autism > 26-1 (January 2022) . - p.270-275 Mots-clés : Autism Spectrum Disorder/therapy  Autistic Disorder  Covid-19  Caregivers  Child  Humans  Mentoring  SARS-CoV-2  South Africa  Telemedicine  United States  adaptation  autism spectrum disorder  caregiver coaching  digital divide  telehealth  Research and Development, Akili Interactive, LabCorp, Inc, Roche Pharmaceutical  Company, and Tris Pharma, is a consultant for Apple, Inc., Gerson Lehrman Group,  Guidepoint, Inc, Axial Ventures, Teva Pharmaceutical, and is CEO of DASIO, LLC. She  has received book royalties from Guilford Press, Oxford University Press, and  Springer Nature Press. Howard reports personal fees from Roche. Index. décimale : PER Périodiques Résumé : COVID-19 caused many autism spectrum disorder caregiver-coaching studies to move to telehealth. Telehealth can increase the diversity of people who take part in research. This matters because most autism spectrum disorder studies have included people who have resources, are White, and live in North America and Europe. When study participants are similar, it is hard to understand which interventions can help different types of people who live in different parts of the world. While telehealth may allow more people to take part in research, it needs to "fit" the local context and consider the "digital divide" because many people around the world have no access to computers and the Internet. This short report describes changes to two research studies that include caregiver coaching based on the Early Start Denver Model in the United States and South Africa. We describe how the local context, including technology and Internet access, guided the telehealth approach. By doing so, we highlight ways to make telehealth available to more people around the world. The pandemic can help us understand how telehealth can "fit" diverse places and support high-quality research. It is important that study changes are tracked and we assess how well the changes work. COVID-19 telehealth changes to caregiver coaching can result in new ways to reach more people around the world. En ligne : http://dx.doi.org/10.1177/13623613211022585 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=451

Predictors of Caregiver Strain for Parents of Children with Autism Spectrum Disorder / Jessica BRADSHAW in Journal of Autism and Developmental Disorders, 51-9 (September 2021)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 51-9 (September 2021) . - p.3039-3049 Titre : Predictors of Caregiver Strain for Parents of Children with Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Jessica BRADSHAW, Auteur ; S. GILLESPIE, Auteur ; C. MCCRACKEN, Auteur ; B. H. KING, Auteur ; J. T. MCCRACKEN, Auteur ; C. R. JOHNSON, Auteur ; L. LECAVALIER, Auteur ; T. SMITH, Auteur ; N. SWIEZY, Auteur ; Karen E. BEARSS, Auteur ; L. SIKICH, Auteur ; C. DONNELLY, Auteur ; E. HOLLANDER, Auteur ; C. J. MCDOUGLE, Auteur ; Lawrence SCAHILL, Auteur Article en page(s) : p.3039-3049 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder  Caregivers  Child  Family  Humans  Parents  Surveys and Questionnaires  Autism spectrum disorder  Caregiver strain  Disruptive behavior  Stress  Wellbeing Index. décimale : PER Périodiques Résumé : Parents of children with autism spectrum disorder (ASD) face higher levels of caregiver strain compared to parents of children with other disabilities. This study examined child clinical features that predict high levels of caregiver strain for 374 parents of children with ASD. Caregiver strain was measured using the Caregiver Strain Questionnaire (CGSQ) objective, subjective internalized, and subjective externalized subscales. Confirmatory factor analysis indicated an acceptable fit for the original CGSQ three-factor solution. The strongest child predictors across CGSQ subscales were: disruptive behavior for objective strain, autism severity and disruptive behavior for subjective internalized strain, and oppositional behavior and hyperactivity for subjective externalized strain. Individualized interventions that attend to specific elements of parental strain may reduce strain and improve family wellbeing. En ligne : http://dx.doi.org/10.1007/s10803-020-04625-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453 [article] Predictors of Caregiver Strain for Parents of Children with Autism Spectrum Disorder [Texte imprimé et/ou numérique] / Jessica BRADSHAW, Auteur ; S. GILLESPIE, Auteur ; C. MCCRACKEN, Auteur ; B. H. KING, Auteur ; J. T. MCCRACKEN, Auteur ; C. R. JOHNSON, Auteur ; L. LECAVALIER, Auteur ; T. SMITH, Auteur ; N. SWIEZY, Auteur ; Karen E. BEARSS, Auteur ; L. SIKICH, Auteur ; C. DONNELLY, Auteur ; E. HOLLANDER, Auteur ; C. J. MCDOUGLE, Auteur ; Lawrence SCAHILL, Auteur . - p.3039-3049. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 51-9 (September 2021) . - p.3039-3049 Mots-clés : Autism Spectrum Disorder  Caregivers  Child  Family  Humans  Parents  Surveys and Questionnaires  Autism spectrum disorder  Caregiver strain  Disruptive behavior  Stress  Wellbeing Index. décimale : PER Périodiques Résumé : Parents of children with autism spectrum disorder (ASD) face higher levels of caregiver strain compared to parents of children with other disabilities. This study examined child clinical features that predict high levels of caregiver strain for 374 parents of children with ASD. Caregiver strain was measured using the Caregiver Strain Questionnaire (CGSQ) objective, subjective internalized, and subjective externalized subscales. Confirmatory factor analysis indicated an acceptable fit for the original CGSQ three-factor solution. The strongest child predictors across CGSQ subscales were: disruptive behavior for objective strain, autism severity and disruptive behavior for subjective internalized strain, and oppositional behavior and hyperactivity for subjective externalized strain. Individualized interventions that attend to specific elements of parental strain may reduce strain and improve family wellbeing. En ligne : http://dx.doi.org/10.1007/s10803-020-04625-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453

The effects of intranasal oxytocin on reward circuitry responses in children with autism spectrum disorder / R. K. GREENE in Journal of Neurodevelopmental Disorders, 10-1 (December 2018)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 12 p. Titre : The effects of intranasal oxytocin on reward circuitry responses in children with autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : R. K. GREENE, Auteur ; M. SPANOS, Auteur ; C. ALDERMAN, Auteur ; E. WALSH, Auteur ; Joshua BIZZELL, Auteur ; M. G. MOSNER, Auteur ; J. L. KINARD, Auteur ; G. D. STUBER, Auteur ; Tara CHANDRASEKHAR, Auteur ; L. C. POLITTE, Auteur ; L. SIKICH, Auteur ; Gabriel S. DICHTER, Auteur Année de publication : 2018 Article en page(s) : 12 p. Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Oxytocin  Reward  fMRI Index. décimale : PER Périodiques Résumé : BACKGROUND: Intranasal oxytocin (OT) has been shown to improve social communication functioning of individuals with autism spectrum disorder (ASD) and, thus, has received considerable interest as a potential ASD therapeutic agent. Although preclinical research indicates that OT modulates the functional output of the mesocorticolimbic dopamine system that processes rewards, no clinical brain imaging study to date has examined the effects of OT on this system using a reward processing paradigm. To address this, we used an incentive delay task to examine the effects of a single dose of intranasal OT, versus placebo (PLC), on neural responses to social and nonsocial rewards in children with ASD. METHODS: In this placebo-controlled double-blind study, 28 children and adolescents with ASD (age: M = 13.43 years, SD = 2.36) completed two fMRI scans, one after intranasal OT administration and one after PLC administration. During both scanning sessions, participants completed social and nonsocial incentive delay tasks. Task-based neural activation and connectivity were examined to assess the impact of OT relative to PLC on mesocorticolimbic brain responses to social and nonsocial reward anticipation and outcomes. RESULTS: Central analyses compared the OT and PLC conditions. During nonsocial reward anticipation, there was greater activation in the right nucleus accumbens (NAcc), left anterior cingulate cortex (ACC), bilateral orbital frontal cortex (OFC), left superior frontal cortex, and right frontal pole (FP) during the OT condition relative to PLC. Alternatively, during social reward anticipation and outcomes, there were no significant increases in brain activation during the OT condition relative to PLC. A Treatment Group x Reward Condition interaction revealed relatively greater activation in the right NAcc, right caudate nucleus, left ACC, and right OFC during nonsocial relative to social reward anticipation during the OT condition relative to PLC. Additionally, these analyses revealed greater activation during nonsocial reward outcomes during the OT condition relative to PLC in the right OFC and left FP. Finally, functional connectivity analyses generally revealed changes in frontostriatal connections during the OT condition relative to PLC in response to nonsocial, but not social, rewards. CONCLUSIONS: The effects of intranasal OT administration on mesocorticolimbic brain systems that process rewards in ASD were observable primarily during the processing of nonsocial incentive salience stimuli. These findings have implications for understanding the effects of OT on neural systems that process rewards, as well as for experimental trials of novel ASD treatments developed to ameliorate social communication impairments in ASD. En ligne : http://dx.doi.org/10.1186/s11689-018-9228-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386 [article] The effects of intranasal oxytocin on reward circuitry responses in children with autism spectrum disorder [Texte imprimé et/ou numérique] / R. K. GREENE, Auteur ; M. SPANOS, Auteur ; C. ALDERMAN, Auteur ; E. WALSH, Auteur ; Joshua BIZZELL, Auteur ; M. G. MOSNER, Auteur ; J. L. KINARD, Auteur ; G. D. STUBER, Auteur ; Tara CHANDRASEKHAR, Auteur ; L. C. POLITTE, Auteur ; L. SIKICH, Auteur ; Gabriel S. DICHTER, Auteur . - 2018 . - 12 p. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 12 p. Mots-clés : Autism spectrum disorder  Oxytocin  Reward  fMRI Index. décimale : PER Périodiques Résumé : BACKGROUND: Intranasal oxytocin (OT) has been shown to improve social communication functioning of individuals with autism spectrum disorder (ASD) and, thus, has received considerable interest as a potential ASD therapeutic agent. Although preclinical research indicates that OT modulates the functional output of the mesocorticolimbic dopamine system that processes rewards, no clinical brain imaging study to date has examined the effects of OT on this system using a reward processing paradigm. To address this, we used an incentive delay task to examine the effects of a single dose of intranasal OT, versus placebo (PLC), on neural responses to social and nonsocial rewards in children with ASD. METHODS: In this placebo-controlled double-blind study, 28 children and adolescents with ASD (age: M = 13.43 years, SD = 2.36) completed two fMRI scans, one after intranasal OT administration and one after PLC administration. During both scanning sessions, participants completed social and nonsocial incentive delay tasks. Task-based neural activation and connectivity were examined to assess the impact of OT relative to PLC on mesocorticolimbic brain responses to social and nonsocial reward anticipation and outcomes. RESULTS: Central analyses compared the OT and PLC conditions. During nonsocial reward anticipation, there was greater activation in the right nucleus accumbens (NAcc), left anterior cingulate cortex (ACC), bilateral orbital frontal cortex (OFC), left superior frontal cortex, and right frontal pole (FP) during the OT condition relative to PLC. Alternatively, during social reward anticipation and outcomes, there were no significant increases in brain activation during the OT condition relative to PLC. A Treatment Group x Reward Condition interaction revealed relatively greater activation in the right NAcc, right caudate nucleus, left ACC, and right OFC during nonsocial relative to social reward anticipation during the OT condition relative to PLC. Additionally, these analyses revealed greater activation during nonsocial reward outcomes during the OT condition relative to PLC in the right OFC and left FP. Finally, functional connectivity analyses generally revealed changes in frontostriatal connections during the OT condition relative to PLC in response to nonsocial, but not social, rewards. CONCLUSIONS: The effects of intranasal OT administration on mesocorticolimbic brain systems that process rewards in ASD were observable primarily during the processing of nonsocial incentive salience stimuli. These findings have implications for understanding the effects of OT on neural systems that process rewards, as well as for experimental trials of novel ASD treatments developed to ameliorate social communication impairments in ASD. En ligne : http://dx.doi.org/10.1186/s11689-018-9228-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386

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