Centre d'Information et de documentation du CRA Rhône-Alpes
CRA
Informations pratiques
-
Adresse
Centre d'information et de documentation
du CRA Rhône-Alpes
Centre Hospitalier le Vinatier
bât 211
95, Bd Pinel
69678 Bron CedexHoraires
Lundi au Vendredi
9h00-12h00 13h30-16h00Contact
Tél: +33(0)4 37 91 54 65
Mail
Fax: +33(0)4 37 91 54 37
-
Détail de l'auteur
Auteur Gabriel S. DICHTER |
Documents disponibles écrits par cet auteur (27)
Faire une suggestion Affiner la recherche
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)
[article]
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
in Journal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 12 p.[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 Vicarious Effort-Based Decision-Making in Autism Spectrum Disorders / Maya G. MOSNER in Journal of Autism and Developmental Disorders, 47-10 (October 2017)
[article]
Titre : Vicarious Effort-Based Decision-Making in Autism Spectrum Disorders Type de document : Texte imprimé et/ou numérique Auteurs : Maya G. MOSNER, Auteur ; Jessica L. KINARD, Auteur ; Sean MCWEENY, Auteur ; Jasmine S. SHAH, Auteur ; Nathan D. MARKIEWITZ, Auteur ; Cara R. DAMIANO-GOODWIN, Auteur ; Margaret R. BURCHINAL, Auteur ; Helena J. V. RUTHERFORD, Auteur ; Rachel K. GREENE, Auteur ; Michael T. TREADWAY, Auteur ; Gabriel S. DICHTER, Auteur Article en page(s) : p.2992-3006 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder Vicarious reward Effort-based decision-making Social motivation Index. décimale : PER Périodiques Résumé : This study investigated vicarious effort-based decision-making in 50 adolescents with autism spectrum disorders (ASD) compared to 32 controls using the Effort Expenditure for Rewards Task. Participants made choices to win money for themselves or for another person. When choosing for themselves, the ASD group exhibited relatively similar patterns of effort-based decision-making across reward parameters. However, when choosing for another person, the ASD group demonstrated relatively decreased sensitivity to reward magnitude, particularly in the high magnitude condition. Finally, patterns of responding in the ASD group were related to individual differences in consummatory pleasure capacity. These findings indicate atypical vicarious effort-based decision-making in ASD and more broadly add to the growing body of literature addressing social reward processing deficits in ASD. En ligne : https://doi.org/10.1007/s10803-017-3220-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=319
in Journal of Autism and Developmental Disorders > 47-10 (October 2017) . - p.2992-3006[article] Vicarious Effort-Based Decision-Making in Autism Spectrum Disorders [Texte imprimé et/ou numérique] / Maya G. MOSNER, Auteur ; Jessica L. KINARD, Auteur ; Sean MCWEENY, Auteur ; Jasmine S. SHAH, Auteur ; Nathan D. MARKIEWITZ, Auteur ; Cara R. DAMIANO-GOODWIN, Auteur ; Margaret R. BURCHINAL, Auteur ; Helena J. V. RUTHERFORD, Auteur ; Rachel K. GREENE, Auteur ; Michael T. TREADWAY, Auteur ; Gabriel S. DICHTER, Auteur . - p.2992-3006.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 47-10 (October 2017) . - p.2992-3006
Mots-clés : Autism spectrum disorder Vicarious reward Effort-based decision-making Social motivation Index. décimale : PER Périodiques Résumé : This study investigated vicarious effort-based decision-making in 50 adolescents with autism spectrum disorders (ASD) compared to 32 controls using the Effort Expenditure for Rewards Task. Participants made choices to win money for themselves or for another person. When choosing for themselves, the ASD group exhibited relatively similar patterns of effort-based decision-making across reward parameters. However, when choosing for another person, the ASD group demonstrated relatively decreased sensitivity to reward magnitude, particularly in the high magnitude condition. Finally, patterns of responding in the ASD group were related to individual differences in consummatory pleasure capacity. These findings indicate atypical vicarious effort-based decision-making in ASD and more broadly add to the growing body of literature addressing social reward processing deficits in ASD. En ligne : https://doi.org/10.1007/s10803-017-3220-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=319