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Auteur Declan G. MURPHY |
Documents disponibles écrits par cet auteur (10)
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Anatomy and aging of the amygdala and hippocampus in autism spectrum disorder: an in vivo magnetic resonance imaging study of Asperger syndrome / Clodagh M. MURPHY in Autism Research, 5-1 (February 2012)
[article]
Titre : Anatomy and aging of the amygdala and hippocampus in autism spectrum disorder: an in vivo magnetic resonance imaging study of Asperger syndrome Type de document : Texte imprimé et/ou numérique Auteurs : Clodagh M. MURPHY, Auteur ; Quinton DEELEY, Auteur ; Eileen DALY, Auteur ; Christine ECKER, Auteur ; F. M. O'BRIEN, Auteur ; B. HALLAHAN, Auteur ; Eva LOTH, Auteur ; F. TOAL, Auteur ; S. REED, Auteur ; S. HALES, Auteur ; D. M. ROBERTSON, Auteur ; Michael C. CRAIG, Auteur ; D. MULLINS, Auteur ; Gareth J. BARKER, Auteur ; T. LAVENDER, Auteur ; P. JOHNSTON, Auteur ; Kieran C. MURPHY, Auteur ; Declan G. MURPHY, Auteur Année de publication : 2012 Article en page(s) : p.3-12 Langues : Anglais (eng) Mots-clés : Asperger syndrome autism amygdala hippocampus age Index. décimale : PER Périodiques Résumé : It has been proposed that people with autism spectrum disorder (ASD) have abnormal morphometry and development of the amygdala and hippocampus (AH). However, previous reports are inconsistent, perhaps because they included people of different ASD diagnoses, ages, and health. We compared, using magnetic resonance imaging, the in vivo anatomy of the AH in 32 healthy individuals with Asperger syndrome (12–47 years) and 32 healthy controls who did not differ significantly in age or IQ. We measured bulk (gray + white matter) volume of the AH using manual tracing (MEASURE). We first compared the volume of AH between individuals with Asperger syndrome and controls and then investigated age-related differences. We compared differences in anatomy before, and after, correcting for whole brain size. There was no significant between group differences in whole brain volume. However, individuals with Asperger syndrome had a significantly larger raw bulk volume of total (P<0.01), right (P<0.01), and left amygdala (P<0.05); and when corrected for overall brain size, total (P<0.05), and right amygdala (P<0.01). There was a significant group difference in aging of left amygdala; controls, but not individuals with Asperger syndrome, had a significant age-related increase in volume (r = 0.486, P<0.01, and r = 0.007, P = 0.97, z = 1.995). There were no significant group differences in volume or age-related effects in hippocampus. Individuals with Asperger syndrome have significant differences from controls in bulk volume and aging of the amygdala. En ligne : http://dx.doi.org/10.1002/aur.227 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=153
in Autism Research > 5-1 (February 2012) . - p.3-12[article] Anatomy and aging of the amygdala and hippocampus in autism spectrum disorder: an in vivo magnetic resonance imaging study of Asperger syndrome [Texte imprimé et/ou numérique] / Clodagh M. MURPHY, Auteur ; Quinton DEELEY, Auteur ; Eileen DALY, Auteur ; Christine ECKER, Auteur ; F. M. O'BRIEN, Auteur ; B. HALLAHAN, Auteur ; Eva LOTH, Auteur ; F. TOAL, Auteur ; S. REED, Auteur ; S. HALES, Auteur ; D. M. ROBERTSON, Auteur ; Michael C. CRAIG, Auteur ; D. MULLINS, Auteur ; Gareth J. BARKER, Auteur ; T. LAVENDER, Auteur ; P. JOHNSTON, Auteur ; Kieran C. MURPHY, Auteur ; Declan G. MURPHY, Auteur . - 2012 . - p.3-12.
Langues : Anglais (eng)
in Autism Research > 5-1 (February 2012) . - p.3-12
Mots-clés : Asperger syndrome autism amygdala hippocampus age Index. décimale : PER Périodiques Résumé : It has been proposed that people with autism spectrum disorder (ASD) have abnormal morphometry and development of the amygdala and hippocampus (AH). However, previous reports are inconsistent, perhaps because they included people of different ASD diagnoses, ages, and health. We compared, using magnetic resonance imaging, the in vivo anatomy of the AH in 32 healthy individuals with Asperger syndrome (12–47 years) and 32 healthy controls who did not differ significantly in age or IQ. We measured bulk (gray + white matter) volume of the AH using manual tracing (MEASURE). We first compared the volume of AH between individuals with Asperger syndrome and controls and then investigated age-related differences. We compared differences in anatomy before, and after, correcting for whole brain size. There was no significant between group differences in whole brain volume. However, individuals with Asperger syndrome had a significantly larger raw bulk volume of total (P<0.01), right (P<0.01), and left amygdala (P<0.05); and when corrected for overall brain size, total (P<0.05), and right amygdala (P<0.01). There was a significant group difference in aging of left amygdala; controls, but not individuals with Asperger syndrome, had a significant age-related increase in volume (r = 0.486, P<0.01, and r = 0.007, P = 0.97, z = 1.995). There were no significant group differences in volume or age-related effects in hippocampus. Individuals with Asperger syndrome have significant differences from controls in bulk volume and aging of the amygdala. En ligne : http://dx.doi.org/10.1002/aur.227 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=153 Cortical and subcortical glutathione levels in adults with autism spectrum disorder / Alice M. S. DURIEUX in Autism Research, 9-4 (April 2016)
[article]
Titre : Cortical and subcortical glutathione levels in adults with autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : Alice M. S. DURIEUX, Auteur ; Jamie HORDER, Auteur ; M. Andreina MENDEZ, Auteur ; Alice EGERTON, Auteur ; Steven C. R. WILLIAMS, Auteur ; C. Ellie WILSON, Auteur ; Debbie SPAIN, Auteur ; Clodagh M. MURPHY, Auteur ; Dene ROBERTSON, Auteur ; Gareth J. BARKER, Auteur ; Declan G. MURPHY, Auteur ; Gráinne M. MCALONAN, Auteur Article en page(s) : p.429-435 Langues : Anglais (eng) Mots-clés : autism magnetic resonance spectroscopy glutathione oxidative stress redox Index. décimale : PER Périodiques Résumé : Increased oxidative stress has been postulated to contribute to the pathogenesis of autism spectrum disorder (ASD). However, reports of alterations in oxidation markers including glutathione (GSH), the major endogenous antioxidant, are indirect, coming from blood plasma level measurements and postmortem studies. Therefore we used in-vivo 3 Tesla proton magnetic resonance spectroscopy ([1H]MRS) to directly measure GSH concentrations in the basal ganglia (BG) and the dorsomedial prefrontal cortex of 21 normally intelligent adult males with ASD and 29 controls who did not differ in age or IQ. There was no difference in brain GSH between patients and controls in either brain area; neither did GSH levels correlate with measures of clinical severity in patients. Thus [1H]MRS measures of cortical and subcortical GSH are not a biomarker for ASD in intellectually able adult men. Autism Res 2016, 9: 429–435. © 2015 The Authors Autism Research published by Wiley Periodicals, Inc. on behalf of International Society for Autism Research. En ligne : http://dx.doi.org/10.1002/aur.1522 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=287
in Autism Research > 9-4 (April 2016) . - p.429-435[article] Cortical and subcortical glutathione levels in adults with autism spectrum disorder [Texte imprimé et/ou numérique] / Alice M. S. DURIEUX, Auteur ; Jamie HORDER, Auteur ; M. Andreina MENDEZ, Auteur ; Alice EGERTON, Auteur ; Steven C. R. WILLIAMS, Auteur ; C. Ellie WILSON, Auteur ; Debbie SPAIN, Auteur ; Clodagh M. MURPHY, Auteur ; Dene ROBERTSON, Auteur ; Gareth J. BARKER, Auteur ; Declan G. MURPHY, Auteur ; Gráinne M. MCALONAN, Auteur . - p.429-435.
Langues : Anglais (eng)
in Autism Research > 9-4 (April 2016) . - p.429-435
Mots-clés : autism magnetic resonance spectroscopy glutathione oxidative stress redox Index. décimale : PER Périodiques Résumé : Increased oxidative stress has been postulated to contribute to the pathogenesis of autism spectrum disorder (ASD). However, reports of alterations in oxidation markers including glutathione (GSH), the major endogenous antioxidant, are indirect, coming from blood plasma level measurements and postmortem studies. Therefore we used in-vivo 3 Tesla proton magnetic resonance spectroscopy ([1H]MRS) to directly measure GSH concentrations in the basal ganglia (BG) and the dorsomedial prefrontal cortex of 21 normally intelligent adult males with ASD and 29 controls who did not differ in age or IQ. There was no difference in brain GSH between patients and controls in either brain area; neither did GSH levels correlate with measures of clinical severity in patients. Thus [1H]MRS measures of cortical and subcortical GSH are not a biomarker for ASD in intellectually able adult men. Autism Res 2016, 9: 429–435. © 2015 The Authors Autism Research published by Wiley Periodicals, Inc. on behalf of International Society for Autism Research. En ligne : http://dx.doi.org/10.1002/aur.1522 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=287 Episodic Recollection Difficulties in ASD Result from Atypical Relational Encoding: Behavioral and Neural Evidence / Sebastian B. GAIGG in Autism Research, 8-3 (June 2015)
[article]
Titre : Episodic Recollection Difficulties in ASD Result from Atypical Relational Encoding: Behavioral and Neural Evidence Type de document : Texte imprimé et/ou numérique Auteurs : Sebastian B. GAIGG, Auteur ; Dermot M. BOWLER, Auteur ; Christine ECKER, Auteur ; Beatriz CALVO-MERINO, Auteur ; Declan G. MURPHY, Auteur Article en page(s) : p.317-327 Langues : Anglais (eng) Mots-clés : autism relational memory item memory recollection familiarity Index. décimale : PER Périodiques Résumé : Memory functioning in Autism Spectrum Disorder (ASD) is characterized by impairments in the encoding of relational but not item information and difficulties in the recollection of contextually rich episodic memories but not in the retrieval of relatively context-free memories through processes of familiarity. The neural underpinnings of this profile and the extent to which encoding difficulties contribute to retrieval difficulties in ASD remain unclear. Using a paradigm developed by Addis and McAndrews [2006; Neuroimage, 33, 1194–1206] we asked adults with and without a diagnosis of ASD to study word-triplets during functional Magnetic Resonance Imaging (fMRI) scanning that varied in the number of category relations amongst component words. Performance at test confirmed attenuated recollection in the context of preserved familiarity based retrieval in ASD. The results also showed that recollection but not familiarity based retrieval increases as a function of category relations in word triads for both groups, indicating a close link between the encoding of relational information and recollection. This link was further supported by the imaging results, where blood oxygen level dependent (BOLD) signal responses in overlapping regions of the inferior prefrontal cortex were sensitive to the relational encoding manipulation as well as the contrast between recollection versus familiarity based retrieval. Interestingly, however, there was no evidence of prefrontal signal differentiation for this latter contrast in the ASD group for whom signal changes in a left hippocampal region were also marginally attenuated. Together, these observations suggest that attenuated levels of episodic recollection in ASD are, at least in part, attributable to anomalies in relational encoding processes. En ligne : http://dx.doi.org/10.1002/aur.1448 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=261
in Autism Research > 8-3 (June 2015) . - p.317-327[article] Episodic Recollection Difficulties in ASD Result from Atypical Relational Encoding: Behavioral and Neural Evidence [Texte imprimé et/ou numérique] / Sebastian B. GAIGG, Auteur ; Dermot M. BOWLER, Auteur ; Christine ECKER, Auteur ; Beatriz CALVO-MERINO, Auteur ; Declan G. MURPHY, Auteur . - p.317-327.
Langues : Anglais (eng)
in Autism Research > 8-3 (June 2015) . - p.317-327
Mots-clés : autism relational memory item memory recollection familiarity Index. décimale : PER Périodiques Résumé : Memory functioning in Autism Spectrum Disorder (ASD) is characterized by impairments in the encoding of relational but not item information and difficulties in the recollection of contextually rich episodic memories but not in the retrieval of relatively context-free memories through processes of familiarity. The neural underpinnings of this profile and the extent to which encoding difficulties contribute to retrieval difficulties in ASD remain unclear. Using a paradigm developed by Addis and McAndrews [2006; Neuroimage, 33, 1194–1206] we asked adults with and without a diagnosis of ASD to study word-triplets during functional Magnetic Resonance Imaging (fMRI) scanning that varied in the number of category relations amongst component words. Performance at test confirmed attenuated recollection in the context of preserved familiarity based retrieval in ASD. The results also showed that recollection but not familiarity based retrieval increases as a function of category relations in word triads for both groups, indicating a close link between the encoding of relational information and recollection. This link was further supported by the imaging results, where blood oxygen level dependent (BOLD) signal responses in overlapping regions of the inferior prefrontal cortex were sensitive to the relational encoding manipulation as well as the contrast between recollection versus familiarity based retrieval. Interestingly, however, there was no evidence of prefrontal signal differentiation for this latter contrast in the ASD group for whom signal changes in a left hippocampal region were also marginally attenuated. Together, these observations suggest that attenuated levels of episodic recollection in ASD are, at least in part, attributable to anomalies in relational encoding processes. En ligne : http://dx.doi.org/10.1002/aur.1448 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=261 Erratum : White matter integrity in Asperger syndrome: A preliminary diffusion tensor magnetic resonance imaging study in adults / Oswald J.N. BLOEMEN in Autism Research, 4-2 (April 2011)
[article]
Titre : Erratum : White matter integrity in Asperger syndrome: A preliminary diffusion tensor magnetic resonance imaging study in adults Type de document : Texte imprimé et/ou numérique Auteurs : Oswald J.N. BLOEMEN, Auteur ; Quinton DEELEY, Auteur ; Fred SUNDRAM, Auteur ; Eileen DALY, Auteur ; Gareth J. BARKER, Auteur ; Derek K. JONES, Auteur ; Therese A.M.J. VAN AMELSVOORT, Auteur ; Nicole SCHMITZ, Auteur ; Dene ROBERTSON, Auteur ; Kieran C. MURPHY, Auteur ; Declan G. MURPHY, Auteur Année de publication : 2011 Article en page(s) : p.160 Langues : Anglais (eng) Index. décimale : PER Périodiques En ligne : http://dx.doi.org/10.1002/aur.189 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=121
in Autism Research > 4-2 (April 2011) . - p.160[article] Erratum : White matter integrity in Asperger syndrome: A preliminary diffusion tensor magnetic resonance imaging study in adults [Texte imprimé et/ou numérique] / Oswald J.N. BLOEMEN, Auteur ; Quinton DEELEY, Auteur ; Fred SUNDRAM, Auteur ; Eileen DALY, Auteur ; Gareth J. BARKER, Auteur ; Derek K. JONES, Auteur ; Therese A.M.J. VAN AMELSVOORT, Auteur ; Nicole SCHMITZ, Auteur ; Dene ROBERTSON, Auteur ; Kieran C. MURPHY, Auteur ; Declan G. MURPHY, Auteur . - 2011 . - p.160.
Langues : Anglais (eng)
in Autism Research > 4-2 (April 2011) . - p.160
Index. décimale : PER Périodiques En ligne : http://dx.doi.org/10.1002/aur.189 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=121 Executive functioning differences between adults with attention deficit hyperactivity disorder and autistic spectrum disorder in initiation, planning and strategy formation / Jessica BRAMHAM in Autism, 13-3 (May 2009)
[article]
Titre : Executive functioning differences between adults with attention deficit hyperactivity disorder and autistic spectrum disorder in initiation, planning and strategy formation Type de document : Texte imprimé et/ou numérique Auteurs : Jessica BRAMHAM, Auteur ; Philip ASHERSON, Auteur ; Declan G. MURPHY, Auteur ; Ailsa RUSSELL, Auteur ; Fiona AMBERY, Auteur ; Robin MORRIS, Auteur ; Kiriakos XENITIDIS, Auteur ; Susan E. YOUNG, Auteur Année de publication : 2009 Article en page(s) : p.245-264 Langues : Anglais (eng) Mots-clés : ADHD adults ASD executive-functioning Index. décimale : PER Périodiques Résumé : Executive functioning deficits characterize the neuropsychological profiles of the childhood neurodevelopmental disorders of attention deficit hyperactivity disorder (ADHD) and autistic spectrum disorder (ASD). This study sought to determine whether similar impairments exist in adults with ADHD (N = 53) and ASD (N = 45) in comparison with a healthy control group (N = 31), whether the two disorders can be distinguished on the basis of their executive functioning features, and whether these impairments are related to symptom severity. Both clinical groups were found to exhibit executive functioning deficits. The ADHD group had difficulty withholding a response, with relative preservation of initiation and planning abilities. In contrast, the ASD group exhibited significant impairments in initiation, planning and strategy formation. The specific executive functioning deficits were related to severity of response inhibition impairments in ADHD and stereotyped, repetitive behaviours in ASD. These findings suggest the pattern of executive functioning deficits follows a consistent trajectory into adulthood. En ligne : http://dx.doi.org/10.1177/1362361309103790 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=728
in Autism > 13-3 (May 2009) . - p.245-264[article] Executive functioning differences between adults with attention deficit hyperactivity disorder and autistic spectrum disorder in initiation, planning and strategy formation [Texte imprimé et/ou numérique] / Jessica BRAMHAM, Auteur ; Philip ASHERSON, Auteur ; Declan G. MURPHY, Auteur ; Ailsa RUSSELL, Auteur ; Fiona AMBERY, Auteur ; Robin MORRIS, Auteur ; Kiriakos XENITIDIS, Auteur ; Susan E. YOUNG, Auteur . - 2009 . - p.245-264.
Langues : Anglais (eng)
in Autism > 13-3 (May 2009) . - p.245-264
Mots-clés : ADHD adults ASD executive-functioning Index. décimale : PER Périodiques Résumé : Executive functioning deficits characterize the neuropsychological profiles of the childhood neurodevelopmental disorders of attention deficit hyperactivity disorder (ADHD) and autistic spectrum disorder (ASD). This study sought to determine whether similar impairments exist in adults with ADHD (N = 53) and ASD (N = 45) in comparison with a healthy control group (N = 31), whether the two disorders can be distinguished on the basis of their executive functioning features, and whether these impairments are related to symptom severity. Both clinical groups were found to exhibit executive functioning deficits. The ADHD group had difficulty withholding a response, with relative preservation of initiation and planning abilities. In contrast, the ASD group exhibited significant impairments in initiation, planning and strategy formation. The specific executive functioning deficits were related to severity of response inhibition impairments in ADHD and stereotyped, repetitive behaviours in ASD. These findings suggest the pattern of executive functioning deficits follows a consistent trajectory into adulthood. En ligne : http://dx.doi.org/10.1177/1362361309103790 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=728 Facial expression recognition is linked to clinical and neurofunctional differences in autism / Hannah MEYER-LINDENBERG in Molecular Autism, 13 (2022)
PermalinkOffering to Share: How to Put Heads Together in Autism Neuroimaging / Matthew K. BELMONTE in Journal of Autism and Developmental Disorders, 38-1 (January 2008)
PermalinkPharmacological and dietary-supplement treatments for autism spectrum disorder: a systematic review and network meta-analysis / Spyridon SIAFIS in Molecular Autism, 13 (2022)
PermalinkSocial anxiety in adult males with autism spectrum disorders / Debbie SPAIN in Research in Autism Spectrum Disorders, 32 (December 2016)
PermalinkWhite matter integrity in Asperger syndrome: a preliminary diffusion tensor magnetic resonance imaging study in adults / Oswald J.N. BLOEMEN in Autism Research, 3-5 (October 2010)
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