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)  

Public ISBD [article]  inAutism Research > 5-1 (February 2012) . - p.3-12 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 [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

Dementia in Down's syndrome: an MRI comparison with Alzheimer's disease in the general population / D. MULLINS in Journal of Neurodevelopmental Disorders, 5-1 (December 2013)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 5-1 (December 2013) . - p.19 Titre : Dementia in Down's syndrome: an MRI comparison with Alzheimer's disease in the general population Type de document : Texte imprimé et/ou numérique Auteurs : D. MULLINS, Auteur ; Eileen DALY, Auteur ; A. SIMMONS, Auteur ; F. BEACHER, Auteur ; C. M. FOY, Auteur ; S. LOVESTONE, Auteur ; B. HALLAHAN, Auteur ; K. C. MURPHY, Auteur ; D. G. MURPHY, Auteur Article en page(s) : p.19 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : BACKGROUND: Down's syndrome (DS) is the most common genetic cause of intellectual disability. People with DS are at an increased risk of Alzheimer's disease (AD) compared to the general population. Neuroimaging studies of AD have focused on medial temporal structures; however, to our knowledge, no in vivo case-control study exists comparing the anatomy of dementia in DS to people with AD in the general population. We therefore compared the in vivo brain anatomy of people with DS and dementia (DS+) to those with AD in the general population. METHOD: Using MRI in 192 adults, we compared the volume of whole brain matter, lateral ventricles, temporal lobes and hippocampus in DS subjects with and without dementia (DS+, DS-), to each other and to three non-DS groups. These included one group of individuals with AD and two groups of controls (each age-matched for their respective DS and general population AD cohorts). RESULTS: AD and DS+ subjects showed significant reductions in the volume of the whole brain, hippocampus and temporal lobes and a significant elevation in the volume of the lateral ventricle, compared to their non-demented counterparts. People with DS+ had a smaller reduction in temporal lobe volume compared to individuals with AD. CONCLUSIONS: DS+ and AD subjects have a significant reduction in volume of the same brain regions. We found preliminary evidence that DS individuals may be more sensitive to tissue loss than others and have less 'cognitive reserve'. En ligne : http://dx.doi.org/10.1186/1866-1955-5-19 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=345 [article] Dementia in Down's syndrome: an MRI comparison with Alzheimer's disease in the general population [Texte imprimé et/ou numérique] / D. MULLINS, Auteur ; Eileen DALY, Auteur ; A. SIMMONS, Auteur ; F. BEACHER, Auteur ; C. M. FOY, Auteur ; S. LOVESTONE, Auteur ; B. HALLAHAN, Auteur ; K. C. MURPHY, Auteur ; D. G. MURPHY, Auteur . - p.19. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 5-1 (December 2013) . - p.19 Index. décimale : PER Périodiques Résumé : BACKGROUND: Down's syndrome (DS) is the most common genetic cause of intellectual disability. People with DS are at an increased risk of Alzheimer's disease (AD) compared to the general population. Neuroimaging studies of AD have focused on medial temporal structures; however, to our knowledge, no in vivo case-control study exists comparing the anatomy of dementia in DS to people with AD in the general population. We therefore compared the in vivo brain anatomy of people with DS and dementia (DS+) to those with AD in the general population. METHOD: Using MRI in 192 adults, we compared the volume of whole brain matter, lateral ventricles, temporal lobes and hippocampus in DS subjects with and without dementia (DS+, DS-), to each other and to three non-DS groups. These included one group of individuals with AD and two groups of controls (each age-matched for their respective DS and general population AD cohorts). RESULTS: AD and DS+ subjects showed significant reductions in the volume of the whole brain, hippocampus and temporal lobes and a significant elevation in the volume of the lateral ventricle, compared to their non-demented counterparts. People with DS+ had a smaller reduction in temporal lobe volume compared to individuals with AD. CONCLUSIONS: DS+ and AD subjects have a significant reduction in volume of the same brain regions. We found preliminary evidence that DS individuals may be more sensitive to tissue loss than others and have less 'cognitive reserve'. En ligne : http://dx.doi.org/10.1186/1866-1955-5-19 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=345

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