Dynamic changes in amygdala activation and functional connectivity in children and adolescents with anxiety disorders / Johnna R. SWARTZ in Development and Psychopathology, 26-4 (Part 2) (November 2014)  

Public ISBD [article]  inDevelopment and Psychopathology > 26-4 (Part 2) (November 2014) . - p.1305-1319 Titre : Dynamic changes in amygdala activation and functional connectivity in children and adolescents with anxiety disorders Type de document : Texte imprimé et/ou numérique Auteurs : Johnna R. SWARTZ, Auteur ; K. Luan PHAN, Auteur ; Mike ANGSTADT, Auteur ; Kate D. FITZGERALD, Auteur ; Christopher S. MONK, Auteur Année de publication : 2014 Article en page(s) : p.1305-1319 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Anxiety disorders are associated with abnormalities in amygdala function and prefrontal cortex–amygdala connectivity. The majority of functional magnetic resonance imaging studies have examined mean group differences in amygdala activation or connectivity in children and adolescents with anxiety disorders relative to controls, but emerging evidence suggests that abnormalities in amygdala function are dependent on the timing of the task and may vary across the course of a scanning session. The goal of the present study was to extend our knowledge of the dynamics of amygdala dysfunction by examining whether changes in amygdala activation and connectivity over scanning differ in pediatric anxiety disorder patients relative to typically developing controls during an emotion processing task. Examining changes in activation over time allows for a comparison of how brain function differs during initial exposure to novel stimuli versus more prolonged exposure. Participants included 34 anxiety disorder patients and 19 controls 7 to 19 years old. Participants performed an emotional face-matching task during functional magnetic resonance imaging scanning, and the task was divided into thirds in order to examine change in activation over time. Results demonstrated that patients exhibited an abnormal pattern of amygdala activation characterized by an initially heightened amygdala response relative to controls at the beginning of scanning, followed by significant decreases in activation over time. In addition, controls evidenced greater context-modulated prefrontal cortex–amygdala connectivity during the beginning of scanning relative to patients. These results indicate that differences in emotion processing between the groups vary from initial exposure to novel stimuli relative to more prolonged exposure. Implications are discussed regarding how this pattern of neural activation may relate to altered early-occurring or anticipatory emotion-regulation strategies and maladaptive later-occurring strategies in children and adolescents with anxiety disorders. En ligne : http://dx.doi.org/10.1017/S0954579414001047 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=245 [article] Dynamic changes in amygdala activation and functional connectivity in children and adolescents with anxiety disorders [Texte imprimé et/ou numérique] / Johnna R. SWARTZ, Auteur ; K. Luan PHAN, Auteur ; Mike ANGSTADT, Auteur ; Kate D. FITZGERALD, Auteur ; Christopher S. MONK, Auteur . - 2014 . - p.1305-1319. Langues : Anglais (eng) in Development and Psychopathology > 26-4 (Part 2) (November 2014) . - p.1305-1319 Index. décimale : PER Périodiques Résumé : Anxiety disorders are associated with abnormalities in amygdala function and prefrontal cortex–amygdala connectivity. The majority of functional magnetic resonance imaging studies have examined mean group differences in amygdala activation or connectivity in children and adolescents with anxiety disorders relative to controls, but emerging evidence suggests that abnormalities in amygdala function are dependent on the timing of the task and may vary across the course of a scanning session. The goal of the present study was to extend our knowledge of the dynamics of amygdala dysfunction by examining whether changes in amygdala activation and connectivity over scanning differ in pediatric anxiety disorder patients relative to typically developing controls during an emotion processing task. Examining changes in activation over time allows for a comparison of how brain function differs during initial exposure to novel stimuli versus more prolonged exposure. Participants included 34 anxiety disorder patients and 19 controls 7 to 19 years old. Participants performed an emotional face-matching task during functional magnetic resonance imaging scanning, and the task was divided into thirds in order to examine change in activation over time. Results demonstrated that patients exhibited an abnormal pattern of amygdala activation characterized by an initially heightened amygdala response relative to controls at the beginning of scanning, followed by significant decreases in activation over time. In addition, controls evidenced greater context-modulated prefrontal cortex–amygdala connectivity during the beginning of scanning relative to patients. These results indicate that differences in emotion processing between the groups vary from initial exposure to novel stimuli relative to more prolonged exposure. Implications are discussed regarding how this pattern of neural activation may relate to altered early-occurring or anticipatory emotion-regulation strategies and maladaptive later-occurring strategies in children and adolescents with anxiety disorders. En ligne : http://dx.doi.org/10.1017/S0954579414001047 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=245

Neural activation to emotional faces in adolescents with autism spectrum disorders / Shih-Jen WENG in Journal of Child Psychology and Psychiatry, 52-3 (March 2011)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 52-3 (March 2011) . - p.296-305 Titre : Neural activation to emotional faces in adolescents with autism spectrum disorders Type de document : Texte imprimé et/ou numérique Auteurs : Shih-Jen WENG, Auteur ; Melisa CARRASCO, Auteur ; Johnna R. SWARTZ, Auteur ; Jillian Lee WIGGINS, Auteur ; Nikhil KURAPATI, Auteur ; Israel LIBERZON, Auteur ; Susan RISI, Auteur ; Catherine LORD, Auteur ; Christopher S. MONK, Auteur Année de publication : 2011 Article en page(s) : p.296-305 Langues : Anglais (eng) Mots-clés : Autism  adolescents  fMRI  faces  emotion Index. décimale : PER Périodiques Résumé : Background:  Autism spectrum disorders (ASD) involve a core deficit in social functioning and impairments in the ability to recognize face emotions. In an emotional faces task designed to constrain group differences in attention, the present study used functional MRI to characterize activation in the amygdala, ventral prefrontal cortex (vPFC), and striatum, three structures involved in socio-emotional processing in adolescents with ASD. Methods:  Twenty-two adolescents with ASD and 20 healthy adolescents viewed facial expressions (happy, fearful, sad and neutral) that were briefly presented (250 ms) during functional MRI acquisition. To monitor attention, subjects pressed a button to identify the gender of each face. Results:  The ASD group showed greater activation to the faces relative to the control group in the amygdala, vPFC and striatum. Follow-up analyses indicated that the ASD relative to control group showed greater activation in the amygdala, vPFC and striatum (p < .05 small volume corrected), particularly to sad faces. Moreover, in the ASD group, there was a negative correlation between developmental variables (age and pubertal status) and mean activation from the whole bilateral amygdala; younger adolescents showed greater activation than older adolescents. There were no group differences in accuracy or reaction time in the gender identification task. Conclusions:  When group differences in attention to facial expressions were limited, adolescents with ASD showed greater activation in structures involved in socio-emotional processing. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2010.02317.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=118 [article] Neural activation to emotional faces in adolescents with autism spectrum disorders [Texte imprimé et/ou numérique] / Shih-Jen WENG, Auteur ; Melisa CARRASCO, Auteur ; Johnna R. SWARTZ, Auteur ; Jillian Lee WIGGINS, Auteur ; Nikhil KURAPATI, Auteur ; Israel LIBERZON, Auteur ; Susan RISI, Auteur ; Catherine LORD, Auteur ; Christopher S. MONK, Auteur . - 2011 . - p.296-305. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 52-3 (March 2011) . - p.296-305 Mots-clés : Autism  adolescents  fMRI  faces  emotion Index. décimale : PER Périodiques Résumé : Background:  Autism spectrum disorders (ASD) involve a core deficit in social functioning and impairments in the ability to recognize face emotions. In an emotional faces task designed to constrain group differences in attention, the present study used functional MRI to characterize activation in the amygdala, ventral prefrontal cortex (vPFC), and striatum, three structures involved in socio-emotional processing in adolescents with ASD. Methods:  Twenty-two adolescents with ASD and 20 healthy adolescents viewed facial expressions (happy, fearful, sad and neutral) that were briefly presented (250 ms) during functional MRI acquisition. To monitor attention, subjects pressed a button to identify the gender of each face. Results:  The ASD group showed greater activation to the faces relative to the control group in the amygdala, vPFC and striatum. Follow-up analyses indicated that the ASD relative to control group showed greater activation in the amygdala, vPFC and striatum (p < .05 small volume corrected), particularly to sad faces. Moreover, in the ASD group, there was a negative correlation between developmental variables (age and pubertal status) and mean activation from the whole bilateral amygdala; younger adolescents showed greater activation than older adolescents. There were no group differences in accuracy or reaction time in the gender identification task. Conclusions:  When group differences in attention to facial expressions were limited, adolescents with ASD showed greater activation in structures involved in socio-emotional processing. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2010.02317.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=118

Reward- and threat-related neural function associated with risk and presence of depression in adolescents: a study using a composite risk score in Brazil / Leehyun YOON in Journal of Child Psychology and Psychiatry, 63-5 (May 2022)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 63-5 (May 2022) . - p.579-590 Titre : Reward- and threat-related neural function associated with risk and presence of depression in adolescents: a study using a composite risk score in Brazil Type de document : Texte imprimé et/ou numérique Auteurs : Leehyun YOON, Auteur ; Fernanda ROHRSETZER, Auteur ; Lucas BATTEL, Auteur ; Mauricio ANÉS, Auteur ; Pedro H. MANFRO, Auteur ; Luis A. ROHDE, Auteur ; Anna VIDUANI, Auteur ; Zuzanna ZAJKOWSKA, Auteur ; Valeria MONDELLI, Auteur ; Christian KIELING, Auteur ; Johnna R. SWARTZ, Auteur Article en page(s) : p.579-590 Langues : Anglais (eng) Mots-clés : Adolescent  Brain/diagnostic imaging  Brain Mapping/methods  Brazil/epidemiology  Depression/epidemiology  Humans  Magnetic Resonance Imaging/methods  Reward  Risk Factors  Depression  adolescence  functional MRI (fMRI) Index. décimale : PER Périodiques Résumé : BACKGROUND: Neuroimaging studies on adolescents at risk for depression have relied on a single risk factor and focused on adolescents in high-income countries. Using a composite risk score, this study aims to examine neural activity and connectivity associated with risk and presence of depression in adolescents in Brazil. METHODS: Depression risk was defined with the Identifying Depression Early in Adolescence Risk Score (IDEA-RS), calculated using a prognostic model that included 11 socio-demographic risk factors. Adolescents recruited from schools in Porto Alegre were classified into a low-risk (i.e., low IDEA-RS and no lifetime depression), high-risk (i.e., high IDEA-RS and no lifetime depression), or clinically depressed group (i.e., high IDEA-RS and depression diagnosis). One hundred fifty adolescents underwent a functional MRI scan while completing a reward-related gambling and a threat-related face-matching task. We compared group differences in activity and connectivity of the ventral striatum (VS) and amygdala during the gambling and face-matching tasks, respectively, and group differences in whole-brain neural activity. RESULTS: Although there was no group difference in reward-related VS or threat-related amygdala activity, the depressed group showed elevated VS activity to punishment relative to high-risk adolescents. The whole-brain analysis found reduced reward-related activity in the lateral prefrontal cortex of patients and high-risk adolescents compared with low-risk adolescents. Compared with low-risk adolescents, high-risk and depressed adolescents showed reduced threat-related left amygdala connectivity with thalamus, superior temporal gyrus, inferior parietal gyrus, precentral gyrus, and supplementary motor area. CONCLUSIONS: We identified neural correlates associated with risk and presence of depression in a well-characterized sample of adolescents. These findings enhance knowledge of the neurobiological underpinnings of risk and presence of depression in Brazil. Future longitudinal studies are needed to examine whether the observed neural patterns of high-risk adolescents predict the development of depression. En ligne : http://dx.doi.org/10.1111/jcpp.13496 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=476 [article] Reward- and threat-related neural function associated with risk and presence of depression in adolescents: a study using a composite risk score in Brazil [Texte imprimé et/ou numérique] / Leehyun YOON, Auteur ; Fernanda ROHRSETZER, Auteur ; Lucas BATTEL, Auteur ; Mauricio ANÉS, Auteur ; Pedro H. MANFRO, Auteur ; Luis A. ROHDE, Auteur ; Anna VIDUANI, Auteur ; Zuzanna ZAJKOWSKA, Auteur ; Valeria MONDELLI, Auteur ; Christian KIELING, Auteur ; Johnna R. SWARTZ, Auteur . - p.579-590. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 63-5 (May 2022) . - p.579-590 Mots-clés : Adolescent  Brain/diagnostic imaging  Brain Mapping/methods  Brazil/epidemiology  Depression/epidemiology  Humans  Magnetic Resonance Imaging/methods  Reward  Risk Factors  Depression  adolescence  functional MRI (fMRI) Index. décimale : PER Périodiques Résumé : BACKGROUND: Neuroimaging studies on adolescents at risk for depression have relied on a single risk factor and focused on adolescents in high-income countries. Using a composite risk score, this study aims to examine neural activity and connectivity associated with risk and presence of depression in adolescents in Brazil. METHODS: Depression risk was defined with the Identifying Depression Early in Adolescence Risk Score (IDEA-RS), calculated using a prognostic model that included 11 socio-demographic risk factors. Adolescents recruited from schools in Porto Alegre were classified into a low-risk (i.e., low IDEA-RS and no lifetime depression), high-risk (i.e., high IDEA-RS and no lifetime depression), or clinically depressed group (i.e., high IDEA-RS and depression diagnosis). One hundred fifty adolescents underwent a functional MRI scan while completing a reward-related gambling and a threat-related face-matching task. We compared group differences in activity and connectivity of the ventral striatum (VS) and amygdala during the gambling and face-matching tasks, respectively, and group differences in whole-brain neural activity. RESULTS: Although there was no group difference in reward-related VS or threat-related amygdala activity, the depressed group showed elevated VS activity to punishment relative to high-risk adolescents. The whole-brain analysis found reduced reward-related activity in the lateral prefrontal cortex of patients and high-risk adolescents compared with low-risk adolescents. Compared with low-risk adolescents, high-risk and depressed adolescents showed reduced threat-related left amygdala connectivity with thalamus, superior temporal gyrus, inferior parietal gyrus, precentral gyrus, and supplementary motor area. CONCLUSIONS: We identified neural correlates associated with risk and presence of depression in a well-characterized sample of adolescents. These findings enhance knowledge of the neurobiological underpinnings of risk and presence of depression in Brazil. Future longitudinal studies are needed to examine whether the observed neural patterns of high-risk adolescents predict the development of depression. En ligne : http://dx.doi.org/10.1111/jcpp.13496 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=476

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