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Altered Structure–Function Relations of Semantic Processing in Youths with High-Functioning Autism: A Combined Diffusion and Functional MRI Study / Yu-Chun LO in Autism Research, 6-6 (December 2013)
[article]
Titre : Altered Structure–Function Relations of Semantic Processing in Youths with High-Functioning Autism: A Combined Diffusion and Functional MRI Study Type de document : Texte imprimé et/ou numérique Auteurs : Yu-Chun LO, Auteur ; Tai-Li CHOU, Auteur ; Li-Ying FAN, Auteur ; Susan Shur-Fen GAU, Auteur ; Yen-Nan CHIU, Auteur ; Wen-Yih Isaac TSENG, Auteur Année de publication : 2013 Article en page(s) : p.561-570 Langues : Anglais (eng) Mots-clés : autism dual stream model diffusion spectrum imaging functional MRI tractography Index. décimale : PER Périodiques Résumé : Deficits in language and communication are among the core symptoms of autism, a common neurodevelopmental disorder with long-term impairment. Despite the striking nature of the autistic language impairment, knowledge about its corresponding alterations in the brain is still evolving. We hypothesized that the dual stream language network is altered in autism, and that this alteration could be revealed by changes in the relationships between microstructural integrity and functional activation. The study recruited 20 right-handed male youths with autism and 20 carefully matched individually, typically developing (TD) youths. Microstructural integrity of the left dorsal and left ventral pathways responsible for language processing and the functional activation of the connected brain regions were investigated by using diffusion spectrum imaging and functional magnetic resonance imaging of a semantic task, respectively. Youths with autism had significantly poorer language function, and lower functional activation in left dorsal and left ventral regions of the language network, compared with TD youths. The TD group showed a significant correlation of the functional activation of the left dorsal region with microstructural integrity of the left ventral pathway, whereas the autism group showed a significant correlation of the functional activation of the left ventral region with microstructural integrity of the left dorsal pathway, and moreover verbal comprehension index was correlated with microstructural integrity of the left ventral pathway. These altered structure–function relationships in autism suggest possible involvement of the dual pathways in supporting deficient semantic processing. En ligne : http://dx.doi.org/10.1002/aur.1315 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=221
in Autism Research > 6-6 (December 2013) . - p.561-570[article] Altered Structure–Function Relations of Semantic Processing in Youths with High-Functioning Autism: A Combined Diffusion and Functional MRI Study [Texte imprimé et/ou numérique] / Yu-Chun LO, Auteur ; Tai-Li CHOU, Auteur ; Li-Ying FAN, Auteur ; Susan Shur-Fen GAU, Auteur ; Yen-Nan CHIU, Auteur ; Wen-Yih Isaac TSENG, Auteur . - 2013 . - p.561-570.
Langues : Anglais (eng)
in Autism Research > 6-6 (December 2013) . - p.561-570
Mots-clés : autism dual stream model diffusion spectrum imaging functional MRI tractography Index. décimale : PER Périodiques Résumé : Deficits in language and communication are among the core symptoms of autism, a common neurodevelopmental disorder with long-term impairment. Despite the striking nature of the autistic language impairment, knowledge about its corresponding alterations in the brain is still evolving. We hypothesized that the dual stream language network is altered in autism, and that this alteration could be revealed by changes in the relationships between microstructural integrity and functional activation. The study recruited 20 right-handed male youths with autism and 20 carefully matched individually, typically developing (TD) youths. Microstructural integrity of the left dorsal and left ventral pathways responsible for language processing and the functional activation of the connected brain regions were investigated by using diffusion spectrum imaging and functional magnetic resonance imaging of a semantic task, respectively. Youths with autism had significantly poorer language function, and lower functional activation in left dorsal and left ventral regions of the language network, compared with TD youths. The TD group showed a significant correlation of the functional activation of the left dorsal region with microstructural integrity of the left ventral pathway, whereas the autism group showed a significant correlation of the functional activation of the left ventral region with microstructural integrity of the left dorsal pathway, and moreover verbal comprehension index was correlated with microstructural integrity of the left ventral pathway. These altered structure–function relationships in autism suggest possible involvement of the dual pathways in supporting deficient semantic processing. En ligne : http://dx.doi.org/10.1002/aur.1315 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=221 Atypical Visuospatial Processing in Autism: Insights from Functional Connectivity Analysis / Jane MCGRATH in Autism Research, 5-5 (October 2012)
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Titre : Atypical Visuospatial Processing in Autism: Insights from Functional Connectivity Analysis Type de document : Texte imprimé et/ou numérique Auteurs : Jane MCGRATH, Auteur ; Katherine A. JOHNSON, Auteur ; Christine ECKER, Auteur ; Erik O'HANLON, Auteur ; Michael GILL, Auteur ; Louise GALLAGHER, Auteur ; Hugh GARAVAN, Auteur Article en page(s) : p.314-330 Langues : Anglais (eng) Mots-clés : autism functional MRI visuospatial processing mental rotation functional connectivity Index. décimale : PER Périodiques Résumé : Atypical visuospatial processing is commonly described in autism spectrum disorders (ASDs); however the specific neurobiological underpinnings of this phenomenon are poorly understood. Given the extensive evidence suggesting ASDs are characterized by abnormal neural connectivity, this study aimed to investigate network connectivity during visuospatial processing in ASD. Twenty-two males with ASD without intellectual disability and 22 individually matched controls performed a mental rotation task during functional magnetic resonance imaging (MRI) in which two rotated stimuli were judged to be same (“Same Trials”) or mirror-imaged (“Mirror Trials”). Behavioral results revealed a relative advantage of mental rotation in the ASD group—controls were slower responding to the more difficult Mirror Trials than Same Trials whereas the ASD group completed Mirror Trials and Same-trials at similar speeds. In the ASD group, brain activity was reduced in frontal, temporal, occipital, striatal, and cerebellar regions and, consistent with previous literature, functional connectivity between a number of brain regions was reduced. However, some connections appeared to be conserved and were recruited in a qualitatively different way by the two groups. As task difficulty increased (on Mirror Trials), controls tended to increase connections between certain brain regions, whereas the ASD group appeared to suppress connections between these regions. There was an interesting exception to this pattern in the visual cortex, a finding that may suggest an advantage in early visual perceptual processing in ASD. Overall, this study has identified a relative advantage in mental rotation in ASD that is associated with aberrant neural connectivity and that may stem from enhanced visual perceptual processing. Autism Res 2012, 5: 314–330. © 2012 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1245 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=183
in Autism Research > 5-5 (October 2012) . - p.314-330[article] Atypical Visuospatial Processing in Autism: Insights from Functional Connectivity Analysis [Texte imprimé et/ou numérique] / Jane MCGRATH, Auteur ; Katherine A. JOHNSON, Auteur ; Christine ECKER, Auteur ; Erik O'HANLON, Auteur ; Michael GILL, Auteur ; Louise GALLAGHER, Auteur ; Hugh GARAVAN, Auteur . - p.314-330.
Langues : Anglais (eng)
in Autism Research > 5-5 (October 2012) . - p.314-330
Mots-clés : autism functional MRI visuospatial processing mental rotation functional connectivity Index. décimale : PER Périodiques Résumé : Atypical visuospatial processing is commonly described in autism spectrum disorders (ASDs); however the specific neurobiological underpinnings of this phenomenon are poorly understood. Given the extensive evidence suggesting ASDs are characterized by abnormal neural connectivity, this study aimed to investigate network connectivity during visuospatial processing in ASD. Twenty-two males with ASD without intellectual disability and 22 individually matched controls performed a mental rotation task during functional magnetic resonance imaging (MRI) in which two rotated stimuli were judged to be same (“Same Trials”) or mirror-imaged (“Mirror Trials”). Behavioral results revealed a relative advantage of mental rotation in the ASD group—controls were slower responding to the more difficult Mirror Trials than Same Trials whereas the ASD group completed Mirror Trials and Same-trials at similar speeds. In the ASD group, brain activity was reduced in frontal, temporal, occipital, striatal, and cerebellar regions and, consistent with previous literature, functional connectivity between a number of brain regions was reduced. However, some connections appeared to be conserved and were recruited in a qualitatively different way by the two groups. As task difficulty increased (on Mirror Trials), controls tended to increase connections between certain brain regions, whereas the ASD group appeared to suppress connections between these regions. There was an interesting exception to this pattern in the visual cortex, a finding that may suggest an advantage in early visual perceptual processing in ASD. Overall, this study has identified a relative advantage in mental rotation in ASD that is associated with aberrant neural connectivity and that may stem from enhanced visual perceptual processing. Autism Res 2012, 5: 314–330. © 2012 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1245 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=183 Commentary: Cognitive and emotional empathy in transdiagnostic research – reflections on Klapwijk et al. (2016) / John D. HERRINGTON in Journal of Child Psychology and Psychiatry, 57-6 (June 2016)
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Titre : Commentary: Cognitive and emotional empathy in transdiagnostic research – reflections on Klapwijk et al. (2016) Type de document : Texte imprimé et/ou numérique Auteurs : John D. HERRINGTON, Auteur Article en page(s) : p.748-749 Langues : Anglais (eng) Mots-clés : Empathy autism spectrum disorders conduct disorder functional MRI Index. décimale : PER Périodiques Résumé : Evidence across multiple disorders indicates that empathy is a transdiagnostic dimension of psychopathology. Klapwijk et al.'s (2016) functional MRI study examines whether autism spectrum disorder (ASD) and conduct disorder (CD) can be distinguished by the constructs of ‘cognitive’ and ‘emotional’ empathy – with the former focusing on accurate emotion perception and the latter on shared affective experience. This commentary examines the implications of the cognitive/emotional empathy distinction, and how it fits with existing accounts of perceptual differences in ASD. Cognitive empathy overlaps substantially with the constructs of emotion perception and Theory of Mind – both well studied among individuals with ASD, but generally viewed as fairly distinct from empathy. CD, on the other hand, is typically not associated with frank perceptual deficits. Although the brain imaging data from this study do not provide strong support for the constructs of cognitive and emotional empathy, the general approach used in this study is precisely the kind needed to test the validity and utility of transdiagnostic mechanisms of psychopathology. En ligne : http://dx.doi.org/10.1111/jcpp.12554 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=289
in Journal of Child Psychology and Psychiatry > 57-6 (June 2016) . - p.748-749[article] Commentary: Cognitive and emotional empathy in transdiagnostic research – reflections on Klapwijk et al. (2016) [Texte imprimé et/ou numérique] / John D. HERRINGTON, Auteur . - p.748-749.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 57-6 (June 2016) . - p.748-749
Mots-clés : Empathy autism spectrum disorders conduct disorder functional MRI Index. décimale : PER Périodiques Résumé : Evidence across multiple disorders indicates that empathy is a transdiagnostic dimension of psychopathology. Klapwijk et al.'s (2016) functional MRI study examines whether autism spectrum disorder (ASD) and conduct disorder (CD) can be distinguished by the constructs of ‘cognitive’ and ‘emotional’ empathy – with the former focusing on accurate emotion perception and the latter on shared affective experience. This commentary examines the implications of the cognitive/emotional empathy distinction, and how it fits with existing accounts of perceptual differences in ASD. Cognitive empathy overlaps substantially with the constructs of emotion perception and Theory of Mind – both well studied among individuals with ASD, but generally viewed as fairly distinct from empathy. CD, on the other hand, is typically not associated with frank perceptual deficits. Although the brain imaging data from this study do not provide strong support for the constructs of cognitive and emotional empathy, the general approach used in this study is precisely the kind needed to test the validity and utility of transdiagnostic mechanisms of psychopathology. En ligne : http://dx.doi.org/10.1111/jcpp.12554 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=289 Early life stress is associated with default system integrity and emotionality during infancy / Alice M. GRAHAM in Journal of Child Psychology and Psychiatry, 56-11 (November 2015)
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Titre : Early life stress is associated with default system integrity and emotionality during infancy Type de document : Texte imprimé et/ou numérique Auteurs : Alice M. GRAHAM, Auteur ; Jennifer H. PFEIFER, Auteur ; Philip A. FISHER, Auteur ; Samuel CARPENTER, Auteur ; Damien A. FAIR, Auteur Article en page(s) : p.1212-1222 Langues : Anglais (eng) Mots-clés : Functional MRI infancy stress family functioning brain development Index. décimale : PER Périodiques Résumé : Background Extensive animal research has demonstrated the vulnerability of the brain to early life stress (ELS) with consequences for emotional development and mental health. However, the influence of moderate and common forms of stress on early human brain development is less well-understood and precisely characterized. To date, most work has focused on severe forms of stress, and/or on brain functioning years after stress exposure. Methods In this report we focused on conflict between parents (interparental conflict), a common and relatively moderate form of ELS that is highly relevant for children's mental health outcomes. We used resting state functional connectivity MRI to examine the coordinated functioning of the infant brain (N = 23; 6–12-months-of-age) in the context of interparental conflict. We focused on the default mode network (DMN) due to its well-characterized developmental trajectory and implications for mental health. We further examined DMN strength as a mediator between conflict and infants’ negative emotionality. Results Higher interparental conflict since birth was associated with infants showing stronger connectivity between two core DMN regions, the posterior cingulate cortex (PCC) and the anterior medial prefrontal cortex (aMPFC). PCC to amygdala connectivity was also increased. Stronger PCC-aMPFC connectivity mediated between higher conflict and higher negative infant emotionality. Conclusions The developing DMN may be an important marker for effects of ELS with relevance for emotional development and subsequent mental health. Increasing understanding of the associations between common forms of family stress and emerging functional brain networks has potential to inform intervention efforts to improve mental health outcomes. En ligne : http://dx.doi.org/10.1111/jcpp.12409 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=270
in Journal of Child Psychology and Psychiatry > 56-11 (November 2015) . - p.1212-1222[article] Early life stress is associated with default system integrity and emotionality during infancy [Texte imprimé et/ou numérique] / Alice M. GRAHAM, Auteur ; Jennifer H. PFEIFER, Auteur ; Philip A. FISHER, Auteur ; Samuel CARPENTER, Auteur ; Damien A. FAIR, Auteur . - p.1212-1222.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 56-11 (November 2015) . - p.1212-1222
Mots-clés : Functional MRI infancy stress family functioning brain development Index. décimale : PER Périodiques Résumé : Background Extensive animal research has demonstrated the vulnerability of the brain to early life stress (ELS) with consequences for emotional development and mental health. However, the influence of moderate and common forms of stress on early human brain development is less well-understood and precisely characterized. To date, most work has focused on severe forms of stress, and/or on brain functioning years after stress exposure. Methods In this report we focused on conflict between parents (interparental conflict), a common and relatively moderate form of ELS that is highly relevant for children's mental health outcomes. We used resting state functional connectivity MRI to examine the coordinated functioning of the infant brain (N = 23; 6–12-months-of-age) in the context of interparental conflict. We focused on the default mode network (DMN) due to its well-characterized developmental trajectory and implications for mental health. We further examined DMN strength as a mediator between conflict and infants’ negative emotionality. Results Higher interparental conflict since birth was associated with infants showing stronger connectivity between two core DMN regions, the posterior cingulate cortex (PCC) and the anterior medial prefrontal cortex (aMPFC). PCC to amygdala connectivity was also increased. Stronger PCC-aMPFC connectivity mediated between higher conflict and higher negative infant emotionality. Conclusions The developing DMN may be an important marker for effects of ELS with relevance for emotional development and subsequent mental health. Increasing understanding of the associations between common forms of family stress and emerging functional brain networks has potential to inform intervention efforts to improve mental health outcomes. En ligne : http://dx.doi.org/10.1111/jcpp.12409 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=270 Successful Face Recognition is Associated with Increased Prefrontal Cortex Activation in Autism Spectrum Disorder / John D. HERRINGTON in Journal of Autism and Developmental Disorders, 45-4 (April 2015)
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Titre : Successful Face Recognition is Associated with Increased Prefrontal Cortex Activation in Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : John D. HERRINGTON, Auteur ; Meghan E. RILEY, Auteur ; Daniel W. GRUPE, Auteur ; Robert T. SCHULTZ, Auteur Article en page(s) : p.902-910 Langues : Anglais (eng) Mots-clés : Autism Functional MRI Selective attention Facial information processing Dorsolateral prefrontal cortex Index. décimale : PER Périodiques Résumé : This study examines whether deficits in visual information processing in autism-spectrum disorder (ASD) can be offset by the recruitment of brain structures involved in selective attention. During functional MRI, 12 children with ASD and 19 control participants completed a selective attention one-back task in which images of faces and houses were superimposed. When attending to faces, the ASD group showed increased activation relative to control participants within multiple prefrontal cortex areas, including dorsolateral prefrontal cortex (DLPFC). DLPFC activation in ASD was associated with increased response times for faces. These data suggest that prefrontal cortex activation may represent a compensatory mechanism for diminished visual information processing abilities in ASD. En ligne : http://dx.doi.org/10.1007/s10803-014-2233-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=258
in Journal of Autism and Developmental Disorders > 45-4 (April 2015) . - p.902-910[article] Successful Face Recognition is Associated with Increased Prefrontal Cortex Activation in Autism Spectrum Disorder [Texte imprimé et/ou numérique] / John D. HERRINGTON, Auteur ; Meghan E. RILEY, Auteur ; Daniel W. GRUPE, Auteur ; Robert T. SCHULTZ, Auteur . - p.902-910.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 45-4 (April 2015) . - p.902-910
Mots-clés : Autism Functional MRI Selective attention Facial information processing Dorsolateral prefrontal cortex Index. décimale : PER Périodiques Résumé : This study examines whether deficits in visual information processing in autism-spectrum disorder (ASD) can be offset by the recruitment of brain structures involved in selective attention. During functional MRI, 12 children with ASD and 19 control participants completed a selective attention one-back task in which images of faces and houses were superimposed. When attending to faces, the ASD group showed increased activation relative to control participants within multiple prefrontal cortex areas, including dorsolateral prefrontal cortex (DLPFC). DLPFC activation in ASD was associated with increased response times for faces. These data suggest that prefrontal cortex activation may represent a compensatory mechanism for diminished visual information processing abilities in ASD. En ligne : http://dx.doi.org/10.1007/s10803-014-2233-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=258 The Impact of Reading Intervention on Brain Responses Underlying Language in Children With Autism / Donna L. MURDAUGH in Autism Research, 9-1 (January 2016)
PermalinkApplying a network framework to the neurobiology of reading and dyslexia / S. K. BAILEY in Journal of Neurodevelopmental Disorders, 10-1 (December 2018)
PermalinkCortical underconnectivity coupled with preserved visuospatial cognition in autism: Evidence from an fMRI study of an embedded figures task / Saudamini Roy DAMARLA in Autism Research, 3-5 (October 2010)
PermalinkFailure to deactivate the default mode network indicates a possible endophenotype of autism / Michael D. SPENCER in Molecular Autism, (December 2012)
PermalinkFronto-Temporal Connectivity is Preserved During Sung but Not Spoken Word Listening, Across the Autism Spectrum / Megha SHARDA in Autism Research, 8-2 (April 2015)
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