Disordered connectivity associated with memory deficits in children with autism spectrum disorders / Agnes S. CHAN in Research in Autism Spectrum Disorders, 5-1 (January-March 2011)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 5-1 (January-March 2011) . - p.237-245 Titre : Disordered connectivity associated with memory deficits in children with autism spectrum disorders Type de document : Texte imprimé et/ou numérique Auteurs : Agnes S. CHAN, Auteur ; Yvonne M.Y. HAN, Auteur ; Sophia L. SZE, Auteur ; Mei-chun CHEUNG, Auteur ; Winnie Wing-man LEUNG, Auteur ; Cho Yee TO, Auteur ; Raymond C. K. CHAN, Auteur Année de publication : 2011 Article en page(s) : p.237-245 Langues : Anglais (eng) Mots-clés : Autism EEG Coherence Memory Theta Children Index. décimale : PER Périodiques Résumé : The present study examined the memory performance and cortical connectivity of children with ASD, and investigated whether the memory deficits exhibited by these children were associated with the cortical connectivity. Twenty-one children with ASD and 21 children with normal development (NC), aged 5–14 years, participated in the study. Each child was administered a neuropsychological battery that included the Test of Non-verbal Intelligence (TONI-III), Digit Span test (DS), Rey-Osterrieth Complex Figure Test (Rey-O), and Hong Kong List Learning Test (HKLLT); and an EEG recording session when performing the visual encoding Object Recognition (OR) task. Six neuropsychological measures from the test battery and six EEG coherence measures in the theta band were compared between the children with ASD and normal children. Results indicated that children with ASD performed at comparable levels with normal children in the DS and Rey-O, but were significantly poorer in HKLLT and OR. They also exhibited significantly elevated long-range coherences in the fronto-posterior connections involving the left hemisphere (left anterior–left posterior; left anterior–right posterior). Pearson correlation showed significant negative associations between the anterior–posterior EEG coherences and memory performance. En ligne : http://dx.doi.org/10.1016/j.rasd.2010.04.005 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=111 [article] Disordered connectivity associated with memory deficits in children with autism spectrum disorders [Texte imprimé et/ou numérique] / Agnes S. CHAN, Auteur ; Yvonne M.Y. HAN, Auteur ; Sophia L. SZE, Auteur ; Mei-chun CHEUNG, Auteur ; Winnie Wing-man LEUNG, Auteur ; Cho Yee TO, Auteur ; Raymond C. K. CHAN, Auteur . - 2011 . - p.237-245. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 5-1 (January-March 2011) . - p.237-245 Mots-clés : Autism EEG Coherence Memory Theta Children Index. décimale : PER Périodiques Résumé : The present study examined the memory performance and cortical connectivity of children with ASD, and investigated whether the memory deficits exhibited by these children were associated with the cortical connectivity. Twenty-one children with ASD and 21 children with normal development (NC), aged 5–14 years, participated in the study. Each child was administered a neuropsychological battery that included the Test of Non-verbal Intelligence (TONI-III), Digit Span test (DS), Rey-Osterrieth Complex Figure Test (Rey-O), and Hong Kong List Learning Test (HKLLT); and an EEG recording session when performing the visual encoding Object Recognition (OR) task. Six neuropsychological measures from the test battery and six EEG coherence measures in the theta band were compared between the children with ASD and normal children. Results indicated that children with ASD performed at comparable levels with normal children in the DS and Rey-O, but were significantly poorer in HKLLT and OR. They also exhibited significantly elevated long-range coherences in the fronto-posterior connections involving the left hemisphere (left anterior–left posterior; left anterior–right posterior). Pearson correlation showed significant negative associations between the anterior–posterior EEG coherences and memory performance. En ligne : http://dx.doi.org/10.1016/j.rasd.2010.04.005 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=111

Verbal memory deficits in relation to organization strategy in high- and low-functioning autistic children / Mei-chun CHEUNG in Research in Autism Spectrum Disorders, 4-4 (October-December 2010)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 4-4 (October-December 2010) . - p.764-771 Titre : Verbal memory deficits in relation to organization strategy in high- and low-functioning autistic children Type de document : Texte imprimé et/ou numérique Auteurs : Mei-chun CHEUNG, Auteur ; Agnes S. CHAN, Auteur ; Sophia L. SZE, Auteur ; Winnie Wing-man LEUNG, Auteur ; Cho Yee TO, Auteur Année de publication : 2010 Article en page(s) : p.764-771 Langues : Anglais (eng) Mots-clés : Memory  Encoding  Retrieval  Organization  Autism  Children Index. décimale : PER Périodiques Résumé : The present study examined the verbal memory profile and its relation to organizational strategies in high-functioning (Hi-AUT) and low-functioning (Lo-AUT) children with autism. Twenty-two Hi-AUT and 16 Lo-AUT, and 22 age-, gender- and handedness-matched normal children (NC) were required to remember a list of semantically related words for immediate and delayed recall and recognition. All autistic children showed impaired free recall, a reduced discrimination score and an elevated false alarm rate at recognition. While Hi-AUT children showed encoding and retrieval deficit, Lo-AUT children demonstrated more severe encoding problem and an additional retention difficulty. Lo-AUT, but not the Hi-AUT, children showed impaired semantic clustering. The recall performance in autistic children was not as strongly correlated with semantic clustering as in NC. The dual deficits of encoding and retrieval in autistic children, regardless of functioning level, implicate a frontal-lobe problem commonly observed in autism. The additional retention difficulty shown by low-functioning autistic children may be suggestive of pathological temporal-lobe involvement. The present findings may provide insights into future exploration of memory intervention for autistic children. En ligne : http://dx.doi.org/10.1016/j.rasd.2010.02.004 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=167 [article] Verbal memory deficits in relation to organization strategy in high- and low-functioning autistic children [Texte imprimé et/ou numérique] / Mei-chun CHEUNG, Auteur ; Agnes S. CHAN, Auteur ; Sophia L. SZE, Auteur ; Winnie Wing-man LEUNG, Auteur ; Cho Yee TO, Auteur . - 2010 . - p.764-771. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 4-4 (October-December 2010) . - p.764-771 Mots-clés : Memory  Encoding  Retrieval  Organization  Autism  Children Index. décimale : PER Périodiques Résumé : The present study examined the verbal memory profile and its relation to organizational strategies in high-functioning (Hi-AUT) and low-functioning (Lo-AUT) children with autism. Twenty-two Hi-AUT and 16 Lo-AUT, and 22 age-, gender- and handedness-matched normal children (NC) were required to remember a list of semantically related words for immediate and delayed recall and recognition. All autistic children showed impaired free recall, a reduced discrimination score and an elevated false alarm rate at recognition. While Hi-AUT children showed encoding and retrieval deficit, Lo-AUT children demonstrated more severe encoding problem and an additional retention difficulty. Lo-AUT, but not the Hi-AUT, children showed impaired semantic clustering. The recall performance in autistic children was not as strongly correlated with semantic clustering as in NC. The dual deficits of encoding and retrieval in autistic children, regardless of functioning level, implicate a frontal-lobe problem commonly observed in autism. The additional retention difficulty shown by low-functioning autistic children may be suggestive of pathological temporal-lobe involvement. The present findings may provide insights into future exploration of memory intervention for autistic children. En ligne : http://dx.doi.org/10.1016/j.rasd.2010.02.004 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=167

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