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NREM sleep EEG activity and procedural memory: A comparison between young neurotypical and autistic adults without sleep complaints / A. C. ROCHETTE in Autism Research, 11-4 (April 2018)
[article]
Titre : NREM sleep EEG activity and procedural memory: A comparison between young neurotypical and autistic adults without sleep complaints Type de document : Texte imprimé et/ou numérique Auteurs : A. C. ROCHETTE, Auteur ; I. SOULIERES, Auteur ; Claude BERTHIAUME, Auteur ; R. GODBOUT, Auteur Article en page(s) : p.613-623 Langues : Anglais (eng) Mots-clés : Eeg autism autism spectrum disorder delta activity learning memory procedural memory sleep Index. décimale : PER Périodiques Résumé : Delta EEG activity (0.75-3.75 Hz) during non-Rapid eye movement (NREM) sleep reflects the thalamo-cortical system contribution to memory consolidation. The functional integrity of this system is thought to be compromised in the Autism spectrum disorder (ASD). This lead us to investigate the topography of NREM sleep Delta EEG activity in young adults with ASD and typically-developed individuals (TYP). The relationship between Delta EEG activity and sensory-motor procedural information was also examined using a rotary pursuit task. Two dependent variables were computed: a learning index (performance increase across trials) and a performance index (average performance for all trials). The ASD group showed less Delta EEG activity during NREM sleep over the parieto-occipital recording sites compared to the TYP group. Delta EEG activity dropped more abruptly from frontal to posterior regions in the ASD group. Both groups of participants learned the task at a similar rate but the ASD group performed less well in terms of contact time with the target. Delta EEG activity during NREM sleep, especially during stage 2, correlated positively with the learning index for electrodes located all over the cortex in the TYP group, but only in the frontal region in the ASD group. Delta EEG activity, especially during stage 2, correlated positively with the performance index, but in the ASD group only. These results reveal an atypical thalamo-cortical functioning over the parieto-occipital region in ASD. They also point toward an atypical relationship between the frontal area and the encoding of sensory-motor procedural memory in ASD. Autism Res 2018, 11: 613-623. (c) 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Slow EEG waves recorded from the scalp during sleep are thought to facilitate learning and memory during daytime. We compared these EEG waves in young autistic adults to typically-developing young adults. We found less slow EEG waves in the ASD group and the pattern of relationship with memory differed between groups. This suggests atypicalities in the way sleep mechanisms are associated with learning and performance in a sensory-motor procedural memory task in ASD individuals. En ligne : http://dx.doi.org/10.1002/aur.1933 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=358
in Autism Research > 11-4 (April 2018) . - p.613-623[article] NREM sleep EEG activity and procedural memory: A comparison between young neurotypical and autistic adults without sleep complaints [Texte imprimé et/ou numérique] / A. C. ROCHETTE, Auteur ; I. SOULIERES, Auteur ; Claude BERTHIAUME, Auteur ; R. GODBOUT, Auteur . - p.613-623.
Langues : Anglais (eng)
in Autism Research > 11-4 (April 2018) . - p.613-623
Mots-clés : Eeg autism autism spectrum disorder delta activity learning memory procedural memory sleep Index. décimale : PER Périodiques Résumé : Delta EEG activity (0.75-3.75 Hz) during non-Rapid eye movement (NREM) sleep reflects the thalamo-cortical system contribution to memory consolidation. The functional integrity of this system is thought to be compromised in the Autism spectrum disorder (ASD). This lead us to investigate the topography of NREM sleep Delta EEG activity in young adults with ASD and typically-developed individuals (TYP). The relationship between Delta EEG activity and sensory-motor procedural information was also examined using a rotary pursuit task. Two dependent variables were computed: a learning index (performance increase across trials) and a performance index (average performance for all trials). The ASD group showed less Delta EEG activity during NREM sleep over the parieto-occipital recording sites compared to the TYP group. Delta EEG activity dropped more abruptly from frontal to posterior regions in the ASD group. Both groups of participants learned the task at a similar rate but the ASD group performed less well in terms of contact time with the target. Delta EEG activity during NREM sleep, especially during stage 2, correlated positively with the learning index for electrodes located all over the cortex in the TYP group, but only in the frontal region in the ASD group. Delta EEG activity, especially during stage 2, correlated positively with the performance index, but in the ASD group only. These results reveal an atypical thalamo-cortical functioning over the parieto-occipital region in ASD. They also point toward an atypical relationship between the frontal area and the encoding of sensory-motor procedural memory in ASD. Autism Res 2018, 11: 613-623. (c) 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Slow EEG waves recorded from the scalp during sleep are thought to facilitate learning and memory during daytime. We compared these EEG waves in young autistic adults to typically-developing young adults. We found less slow EEG waves in the ASD group and the pattern of relationship with memory differed between groups. This suggests atypicalities in the way sleep mechanisms are associated with learning and performance in a sensory-motor procedural memory task in ASD individuals. En ligne : http://dx.doi.org/10.1002/aur.1933 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=358 Hippocampus specific iron deficiency alters competition and cooperation between developing memory systems / E. S. CARLSON in Journal of Neurodevelopmental Disorders, 2-3 (September 2010)
[article]
Titre : Hippocampus specific iron deficiency alters competition and cooperation between developing memory systems Type de document : Texte imprimé et/ou numérique Auteurs : E. S. CARLSON, Auteur ; S. J. FRETHAM, Auteur ; E. UNGER, Auteur ; M. O'CONNOR, Auteur ; A. PETRYK, Auteur ; T. SCHALLERT, Auteur ; R. RAO, Auteur ; I. TKAC, Auteur ; Michael K. GEORGIEFF, Auteur Article en page(s) : p.133-43 Langues : Anglais (eng) Mots-clés : DMT1, Slc11a2, Nuclear magnetic resonance spectroscopy Hippocampus Iron deficiency Memory systems Morris water maze Procedural memory Spatial memory Striatum Index. décimale : PER Périodiques Résumé : UNLABELLED: Iron deficiency (ID) is the most common gestational micronutrient deficiency in the world, targets the fetal hippocampus and striatum and results in long-term behavioral abnormalities. These structures primarily mediate spatial and procedural memory, respectively, in the rodent but have interconnections that result in competition or cooperation during cognitive tasks. We determined whether ID-induced impairment of one alters the function of the other by genetically inducing a 40% reduction of hippocampus iron content in late fetal life in mice and measuring dorsal striatal gene expression and metabolism and the behavioral balance between the two memory systems in adulthood. Slc11a2(hipp/hipp) mice had similar striatum iron content, but 18% lower glucose and 44% lower lactate levels, a 30% higher phosphocreatine:creatine ratio, and reduced iron transporter gene expression compared to wild type (WT) littermates, implying reduced striatal metabolic function. Slc11a2(hipp/hipp) mice had longer mean escape times on a cued task paradigm implying impaired procedural memory. Nevertheless, when hippocampal and striatal memory systems were placed in competition using a Morris Water Maze task that alternates spatial navigation and visual cued responses during training, and forces a choice between hippocampal and striatal strategies during probe trials, Slc11a2(hipp/hipp) mice used the hippocampus-dependent response less often (25%) and the visual cued response more often (75%) compared to WT littermates that used both strategies approximately equally. Hippocampal ID not only reduces spatial recognition memory performance but also affects systems that support procedural memory, suggesting an altered balance between memory systems. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11689-010-9049-0) contains supplementary material, which is available to authorized users. En ligne : http://dx.doi.org/10.1007/s11689-010-9049-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=342
in Journal of Neurodevelopmental Disorders > 2-3 (September 2010) . - p.133-43[article] Hippocampus specific iron deficiency alters competition and cooperation between developing memory systems [Texte imprimé et/ou numérique] / E. S. CARLSON, Auteur ; S. J. FRETHAM, Auteur ; E. UNGER, Auteur ; M. O'CONNOR, Auteur ; A. PETRYK, Auteur ; T. SCHALLERT, Auteur ; R. RAO, Auteur ; I. TKAC, Auteur ; Michael K. GEORGIEFF, Auteur . - p.133-43.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 2-3 (September 2010) . - p.133-43
Mots-clés : DMT1, Slc11a2, Nuclear magnetic resonance spectroscopy Hippocampus Iron deficiency Memory systems Morris water maze Procedural memory Spatial memory Striatum Index. décimale : PER Périodiques Résumé : UNLABELLED: Iron deficiency (ID) is the most common gestational micronutrient deficiency in the world, targets the fetal hippocampus and striatum and results in long-term behavioral abnormalities. These structures primarily mediate spatial and procedural memory, respectively, in the rodent but have interconnections that result in competition or cooperation during cognitive tasks. We determined whether ID-induced impairment of one alters the function of the other by genetically inducing a 40% reduction of hippocampus iron content in late fetal life in mice and measuring dorsal striatal gene expression and metabolism and the behavioral balance between the two memory systems in adulthood. Slc11a2(hipp/hipp) mice had similar striatum iron content, but 18% lower glucose and 44% lower lactate levels, a 30% higher phosphocreatine:creatine ratio, and reduced iron transporter gene expression compared to wild type (WT) littermates, implying reduced striatal metabolic function. Slc11a2(hipp/hipp) mice had longer mean escape times on a cued task paradigm implying impaired procedural memory. Nevertheless, when hippocampal and striatal memory systems were placed in competition using a Morris Water Maze task that alternates spatial navigation and visual cued responses during training, and forces a choice between hippocampal and striatal strategies during probe trials, Slc11a2(hipp/hipp) mice used the hippocampus-dependent response less often (25%) and the visual cued response more often (75%) compared to WT littermates that used both strategies approximately equally. Hippocampal ID not only reduces spatial recognition memory performance but also affects systems that support procedural memory, suggesting an altered balance between memory systems. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11689-010-9049-0) contains supplementary material, which is available to authorized users. En ligne : http://dx.doi.org/10.1007/s11689-010-9049-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=342 Inflectional morphology in high-functioning autism: Evidence for speeded grammatical processing / Matthew WALENSKI in Research in Autism Spectrum Disorders, 8-11 (November 2014)
[article]
Titre : Inflectional morphology in high-functioning autism: Evidence for speeded grammatical processing Type de document : Texte imprimé et/ou numérique Auteurs : Matthew WALENSKI, Auteur ; Stewart H. MOSTOFSKY, Auteur ; Michael T. ULLMAN, Auteur Article en page(s) : p.1607-1621 Langues : Anglais (eng) Mots-clés : Autism Language Morphology Past tense Procedural memory Basal-ganglia Index. décimale : PER Périodiques Résumé : Autism is characterized by language and communication deficits. We investigated grammatical and lexical processes in high-functioning autism by contrasting the production of regular and irregular past-tense forms. Boys with autism and typically developing control boys did not differ in accuracy or error rates. However, boys with autism were significantly faster than controls at producing rule-governed past-tenses (slip-slipped, plim-plimmed, bring-bringed), though not lexically dependent past-tenses (bring-brought, squeeze-squeezed, splim-splam). This pattern mirrors previous findings from Tourette syndrome attributed to abnormalities of frontal/basal-ganglia circuits that underlie grammar. We suggest a similar abnormality underlying language in autism. Importantly, even when children with autism show apparently normal language (e.g., in accuracy or with diagnostic instruments), processes and/or brain structures subserving language may be atypical in the disorder. En ligne : http://dx.doi.org/10.1016/j.rasd.2014.08.009 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=241
in Research in Autism Spectrum Disorders > 8-11 (November 2014) . - p.1607-1621[article] Inflectional morphology in high-functioning autism: Evidence for speeded grammatical processing [Texte imprimé et/ou numérique] / Matthew WALENSKI, Auteur ; Stewart H. MOSTOFSKY, Auteur ; Michael T. ULLMAN, Auteur . - p.1607-1621.
Langues : Anglais (eng)
in Research in Autism Spectrum Disorders > 8-11 (November 2014) . - p.1607-1621
Mots-clés : Autism Language Morphology Past tense Procedural memory Basal-ganglia Index. décimale : PER Périodiques Résumé : Autism is characterized by language and communication deficits. We investigated grammatical and lexical processes in high-functioning autism by contrasting the production of regular and irregular past-tense forms. Boys with autism and typically developing control boys did not differ in accuracy or error rates. However, boys with autism were significantly faster than controls at producing rule-governed past-tenses (slip-slipped, plim-plimmed, bring-bringed), though not lexically dependent past-tenses (bring-brought, squeeze-squeezed, splim-splam). This pattern mirrors previous findings from Tourette syndrome attributed to abnormalities of frontal/basal-ganglia circuits that underlie grammar. We suggest a similar abnormality underlying language in autism. Importantly, even when children with autism show apparently normal language (e.g., in accuracy or with diagnostic instruments), processes and/or brain structures subserving language may be atypical in the disorder. En ligne : http://dx.doi.org/10.1016/j.rasd.2014.08.009 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=241