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Aberrant structural and functional connectivity and neurodevelopmental impairment in preterm children / C. E. ROGERS in Journal of Neurodevelopmental Disorders, 10-1 (December 2018)
[article]
Titre : Aberrant structural and functional connectivity and neurodevelopmental impairment in preterm children Type de document : Texte imprimé et/ou numérique Auteurs : C. E. ROGERS, Auteur ; R. E. LEAN, Auteur ; M. D. WHEELOCK, Auteur ; C. D. SMYSER, Auteur Année de publication : 2018 Article en page(s) : 38 p. Langues : Anglais (eng) Mots-clés : Functional connectivity Magnetic resonance imaging Neurodevelopmental disorders Prematurity Structural connectivity Index. décimale : PER Périodiques Résumé : BACKGROUND: Despite advances in antenatal and neonatal care, preterm birth remains a leading cause of neurological disabilities in children. Infants born prematurely, particularly those delivered at the earliest gestational ages, commonly demonstrate increased rates of impairment across multiple neurodevelopmental domains. Indeed, the current literature establishes that preterm birth is a leading risk factor for cerebral palsy, is associated with executive function deficits, increases risk for impaired receptive and expressive language skills, and is linked with higher rates of co-occurring attention deficit hyperactivity disorder, anxiety, and autism spectrum disorders. These same infants also demonstrate elevated rates of aberrant cerebral structural and functional connectivity, with persistent changes evident across advanced magnetic resonance imaging modalities as early as the neonatal period. Emerging findings from cross-sectional and longitudinal investigations increasingly suggest that aberrant connectivity within key functional networks and white matter tracts may underlie the neurodevelopmental impairments common in this population. MAIN BODY: This review begins by highlighting the elevated rates of neurodevelopmental disorders across domains in this clinical population, describes the patterns of aberrant structural and functional connectivity common in prematurely-born infants and children, and then reviews the increasingly established body of literature delineating the relationship between these brain abnormalities and adverse neurodevelopmental outcomes. We also detail important, typically understudied, clinical, and social variables that may influence these relationships among preterm children, including heritability and psychosocial risks. CONCLUSION: Future work in this domain should continue to leverage longitudinal evaluations of preterm infants which include both neuroimaging and detailed serial neurodevelopmental assessments to further characterize relationships between imaging measures and impairment, information necessary for advancing our understanding of modifiable risk factors underlying these disorders and best practices for improving neurodevelopmental trajectories in this high-risk clinical population. En ligne : http://dx.doi.org/10.1186/s11689-018-9253-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386
in Journal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 38 p.[article] Aberrant structural and functional connectivity and neurodevelopmental impairment in preterm children [Texte imprimé et/ou numérique] / C. E. ROGERS, Auteur ; R. E. LEAN, Auteur ; M. D. WHEELOCK, Auteur ; C. D. SMYSER, Auteur . - 2018 . - 38 p.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 38 p.
Mots-clés : Functional connectivity Magnetic resonance imaging Neurodevelopmental disorders Prematurity Structural connectivity Index. décimale : PER Périodiques Résumé : BACKGROUND: Despite advances in antenatal and neonatal care, preterm birth remains a leading cause of neurological disabilities in children. Infants born prematurely, particularly those delivered at the earliest gestational ages, commonly demonstrate increased rates of impairment across multiple neurodevelopmental domains. Indeed, the current literature establishes that preterm birth is a leading risk factor for cerebral palsy, is associated with executive function deficits, increases risk for impaired receptive and expressive language skills, and is linked with higher rates of co-occurring attention deficit hyperactivity disorder, anxiety, and autism spectrum disorders. These same infants also demonstrate elevated rates of aberrant cerebral structural and functional connectivity, with persistent changes evident across advanced magnetic resonance imaging modalities as early as the neonatal period. Emerging findings from cross-sectional and longitudinal investigations increasingly suggest that aberrant connectivity within key functional networks and white matter tracts may underlie the neurodevelopmental impairments common in this population. MAIN BODY: This review begins by highlighting the elevated rates of neurodevelopmental disorders across domains in this clinical population, describes the patterns of aberrant structural and functional connectivity common in prematurely-born infants and children, and then reviews the increasingly established body of literature delineating the relationship between these brain abnormalities and adverse neurodevelopmental outcomes. We also detail important, typically understudied, clinical, and social variables that may influence these relationships among preterm children, including heritability and psychosocial risks. CONCLUSION: Future work in this domain should continue to leverage longitudinal evaluations of preterm infants which include both neuroimaging and detailed serial neurodevelopmental assessments to further characterize relationships between imaging measures and impairment, information necessary for advancing our understanding of modifiable risk factors underlying these disorders and best practices for improving neurodevelopmental trajectories in this high-risk clinical population. En ligne : http://dx.doi.org/10.1186/s11689-018-9253-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386 Structural and functional connectivity in children and adolescents with and without attention deficit/hyperactivity disorder / Dienke J. BOS in Journal of Child Psychology and Psychiatry, 58-7 (July 2017)
[article]
Titre : Structural and functional connectivity in children and adolescents with and without attention deficit/hyperactivity disorder Type de document : Texte imprimé et/ou numérique Auteurs : Dienke J. BOS, Auteur ; Bob ORANJE, Auteur ; Michelle ACHTERBERG, Auteur ; Chantal VLASKAMP, Auteur ; Sara AMBROSINO, Auteur ; Marcel A. DE REUS, Auteur ; Martijn P. VAN DEN HEUVEL, Auteur ; Serge A. R. B. ROMBOUTS, Auteur ; Sarah DURSTON, Auteur Article en page(s) : p.810-818 Langues : Anglais (eng) Mots-clés : Attention deficit/hyperactivity disorder functional connectivity structural connectivity Default Mode Network developmental delay Index. décimale : PER Périodiques Résumé : Background Attention deficit/hyperactivity disorder (ADHD) has frequently been associated with changes in resting-state functional connectivity, and decreased white matter (WM) integrity. In the current study, we investigated functional connectivity within Default Mode and frontal control resting-state networks (RSNs) in children with and without ADHD. We hypothesized the RSNs of interest would show a pattern of impaired functional integration and segregation and corresponding changes in WM structure. Methods Resting-state fMRI and diffusion-weighted imaging data were acquired from 35 participants with ADHD and 36 matched typically developing peers, aged 6 through 18 years. Functional connectivity was assessed using independent component analysis. Network topology and WM connectivity were further investigated using graph theoretical measures and tract-based spatial statistics (TBSS). Results Resting-state fMRI analyses showed increased functional connectivity in right inferior frontal gyrus (IFG), and bilateral medial prefrontal cortex (mPFC) within the Default Mode and frontal control networks. Furthermore, a more diffuse spatial pattern of functional connectivity was found in children with ADHD. We found no group differences in structural connectivity as assessed with TBSS or graph theoretical measures. Conclusions Resting-state networks show a more diffuse pattern of connectivity in children with ADHD. The increases in functional connectivity in right IFG and bilateral mPFC in children with ADHD may reflect reduced or delayed functional segregation of prefrontal brain regions. As these functional changes were not accompanied by changes in WM, they may precede the development of the frequently reported changes in WM structure. En ligne : http://dx.doi.org/10.1111/jcpp.12712 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=316
in Journal of Child Psychology and Psychiatry > 58-7 (July 2017) . - p.810-818[article] Structural and functional connectivity in children and adolescents with and without attention deficit/hyperactivity disorder [Texte imprimé et/ou numérique] / Dienke J. BOS, Auteur ; Bob ORANJE, Auteur ; Michelle ACHTERBERG, Auteur ; Chantal VLASKAMP, Auteur ; Sara AMBROSINO, Auteur ; Marcel A. DE REUS, Auteur ; Martijn P. VAN DEN HEUVEL, Auteur ; Serge A. R. B. ROMBOUTS, Auteur ; Sarah DURSTON, Auteur . - p.810-818.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 58-7 (July 2017) . - p.810-818
Mots-clés : Attention deficit/hyperactivity disorder functional connectivity structural connectivity Default Mode Network developmental delay Index. décimale : PER Périodiques Résumé : Background Attention deficit/hyperactivity disorder (ADHD) has frequently been associated with changes in resting-state functional connectivity, and decreased white matter (WM) integrity. In the current study, we investigated functional connectivity within Default Mode and frontal control resting-state networks (RSNs) in children with and without ADHD. We hypothesized the RSNs of interest would show a pattern of impaired functional integration and segregation and corresponding changes in WM structure. Methods Resting-state fMRI and diffusion-weighted imaging data were acquired from 35 participants with ADHD and 36 matched typically developing peers, aged 6 through 18 years. Functional connectivity was assessed using independent component analysis. Network topology and WM connectivity were further investigated using graph theoretical measures and tract-based spatial statistics (TBSS). Results Resting-state fMRI analyses showed increased functional connectivity in right inferior frontal gyrus (IFG), and bilateral medial prefrontal cortex (mPFC) within the Default Mode and frontal control networks. Furthermore, a more diffuse spatial pattern of functional connectivity was found in children with ADHD. We found no group differences in structural connectivity as assessed with TBSS or graph theoretical measures. Conclusions Resting-state networks show a more diffuse pattern of connectivity in children with ADHD. The increases in functional connectivity in right IFG and bilateral mPFC in children with ADHD may reflect reduced or delayed functional segregation of prefrontal brain regions. As these functional changes were not accompanied by changes in WM, they may precede the development of the frequently reported changes in WM structure. En ligne : http://dx.doi.org/10.1111/jcpp.12712 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=316 Alterations in the inferior longitudinal fasciculus in autism and associations with visual processing: a diffusion-weighted MRI study / Bart BOETS in Molecular Autism, 9 (2018)
[article]
Titre : Alterations in the inferior longitudinal fasciculus in autism and associations with visual processing: a diffusion-weighted MRI study Type de document : Texte imprimé et/ou numérique Auteurs : Bart BOETS, Auteur ; L. VAN EYLEN, Auteur ; K. SITEK, Auteur ; P. MOORS, Auteur ; I. NOENS, Auteur ; J. STEYAERT, Auteur ; S. SUNAERT, Auteur ; J. WAGEMANS, Auteur Article en page(s) : 10p. Langues : Anglais (eng) Mots-clés : Autism spectrum disorder Diffusion-weighted imaging Inferior longitudinal fasciculus Structural connectivity Visual processing Index. décimale : PER Périodiques Résumé : Background: One of the most reported neural features of autism spectrum disorder (ASD) is the alteration of multiple long-range white matter fiber tracts, as assessed by diffusion-weighted imaging and indexed by reduced fractional anisotropy (FA). Recent methodological advances, however, have shown that this same pattern of reduced FA may be an artifact resulting from excessive head motion and poorer data quality and that aberrant structural connectivity in children with ASD is confined to the right inferior longitudinal fasciculus (ILF). This study aimed at replicating the observation of reduced FA along the right ILF in ASD, while controlling for group differences in head motion and data quality. In addition, we explored associations between reduced FA in the right ILF and quantitative ASD characteristics, and the involvement of the right ILF in visual processing, which is known to be altered in ASD. Method: Global probabilistic tractography was performed on diffusion-weighted imaging data of 17 adolescent boys with ASD and 17 typically developing boys, matched for age, performance IQ, handedness, and data quality. Four tasks were administered to measure various aspects of visual information processing, together with questionnaires assessing ASD characteristics. Group differences were examined and the neural data were integrated with previously published findings using Bayesian statistics to quantify evidence for replication and to pool data and thus increase statistical power. (Partial) correlations were calculated to investigate associations between measures. Results: The ASD group showed consistently reduced FA only in the right ILF and slower performance on the visual search task. Bayesian statistics pooling data across studies confirmed that group differences in FA were confined to the right ILF only, with the evidence for altered FA in the left ILF being indecisive. Lower FA in the right ILF tended to covary with slower visual search and a more fragmented part-oriented processing style. Individual differences in FA of the right ILF were not reliably associated with the severity of ASD traits after controlling for clinical status. Conclusion: Our findings support the growing evidence for reduced FA along a specific fiber tract in ASD, the right ILF. En ligne : http://dx.doi.org/10.1186/s13229-018-0188-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=354
in Molecular Autism > 9 (2018) . - 10p.[article] Alterations in the inferior longitudinal fasciculus in autism and associations with visual processing: a diffusion-weighted MRI study [Texte imprimé et/ou numérique] / Bart BOETS, Auteur ; L. VAN EYLEN, Auteur ; K. SITEK, Auteur ; P. MOORS, Auteur ; I. NOENS, Auteur ; J. STEYAERT, Auteur ; S. SUNAERT, Auteur ; J. WAGEMANS, Auteur . - 10p.
Langues : Anglais (eng)
in Molecular Autism > 9 (2018) . - 10p.
Mots-clés : Autism spectrum disorder Diffusion-weighted imaging Inferior longitudinal fasciculus Structural connectivity Visual processing Index. décimale : PER Périodiques Résumé : Background: One of the most reported neural features of autism spectrum disorder (ASD) is the alteration of multiple long-range white matter fiber tracts, as assessed by diffusion-weighted imaging and indexed by reduced fractional anisotropy (FA). Recent methodological advances, however, have shown that this same pattern of reduced FA may be an artifact resulting from excessive head motion and poorer data quality and that aberrant structural connectivity in children with ASD is confined to the right inferior longitudinal fasciculus (ILF). This study aimed at replicating the observation of reduced FA along the right ILF in ASD, while controlling for group differences in head motion and data quality. In addition, we explored associations between reduced FA in the right ILF and quantitative ASD characteristics, and the involvement of the right ILF in visual processing, which is known to be altered in ASD. Method: Global probabilistic tractography was performed on diffusion-weighted imaging data of 17 adolescent boys with ASD and 17 typically developing boys, matched for age, performance IQ, handedness, and data quality. Four tasks were administered to measure various aspects of visual information processing, together with questionnaires assessing ASD characteristics. Group differences were examined and the neural data were integrated with previously published findings using Bayesian statistics to quantify evidence for replication and to pool data and thus increase statistical power. (Partial) correlations were calculated to investigate associations between measures. Results: The ASD group showed consistently reduced FA only in the right ILF and slower performance on the visual search task. Bayesian statistics pooling data across studies confirmed that group differences in FA were confined to the right ILF only, with the evidence for altered FA in the left ILF being indecisive. Lower FA in the right ILF tended to covary with slower visual search and a more fragmented part-oriented processing style. Individual differences in FA of the right ILF were not reliably associated with the severity of ASD traits after controlling for clinical status. Conclusion: Our findings support the growing evidence for reduced FA along a specific fiber tract in ASD, the right ILF. En ligne : http://dx.doi.org/10.1186/s13229-018-0188-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=354 Annual Research Review: Pediatric posttraumatic stress disorder from a neurodevelopmental network perspective / C. F. WEEMS in Journal of Child Psychology and Psychiatry, 60-4 (April 2019)
[article]
Titre : Annual Research Review: Pediatric posttraumatic stress disorder from a neurodevelopmental network perspective Type de document : Texte imprimé et/ou numérique Auteurs : C. F. WEEMS, Auteur ; J. D. RUSSELL, Auteur ; E. L. NEILL, Auteur ; B. H. MCCURDY, Auteur Article en page(s) : p.395-408 Langues : Anglais (eng) Mots-clés : Posttraumatic stress disorder brain development functional connectivity network analysis structural connectivity Index. décimale : PER Périodiques Résumé : BACKGROUND: Experiencing traumatic stress is common and may lead to posttraumatic stress disorder (PTSD) in a number of children and adolescents. Research using advanced imaging techniques is beginning to elucidate some of the neurobiological correlates of the traumatic stress response in youth. METHODS: This paper summarizes the emerging network perspective of PTSD symptoms and reviews brain imaging research emphasizing structural and functional connectivity studies that employ magnetic resonance imaging techniques in pediatric samples. RESULTS: Differences in structural connections and distributed functional networks such as the salience, default mode, and central executive networks are associated with traumatic and severe early life stress. The role of development has been relatively underappreciated in extant studies though there is evidence that critical brain regions as well as the structural and functional networks implicated undergo significant change in childhood and these typical developmental differences may be affected by traumatic stress. CONCLUSIONS: Future research will benefit from adopting a truly developmental approach that considers children's growth as a meaningful effect (rather than simply a covariate) interacting with traumatic stress to predict disruptions in the anatomical, functional, and connective aspects of brain systems thought to underlie the network of PTSD symptoms. Linking symptom networks with neurodevelopmental network models may be a promising avenue for future work. En ligne : https://dx.doi.org/10.1111/jcpp.12996 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=388
in Journal of Child Psychology and Psychiatry > 60-4 (April 2019) . - p.395-408[article] Annual Research Review: Pediatric posttraumatic stress disorder from a neurodevelopmental network perspective [Texte imprimé et/ou numérique] / C. F. WEEMS, Auteur ; J. D. RUSSELL, Auteur ; E. L. NEILL, Auteur ; B. H. MCCURDY, Auteur . - p.395-408.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 60-4 (April 2019) . - p.395-408
Mots-clés : Posttraumatic stress disorder brain development functional connectivity network analysis structural connectivity Index. décimale : PER Périodiques Résumé : BACKGROUND: Experiencing traumatic stress is common and may lead to posttraumatic stress disorder (PTSD) in a number of children and adolescents. Research using advanced imaging techniques is beginning to elucidate some of the neurobiological correlates of the traumatic stress response in youth. METHODS: This paper summarizes the emerging network perspective of PTSD symptoms and reviews brain imaging research emphasizing structural and functional connectivity studies that employ magnetic resonance imaging techniques in pediatric samples. RESULTS: Differences in structural connections and distributed functional networks such as the salience, default mode, and central executive networks are associated with traumatic and severe early life stress. The role of development has been relatively underappreciated in extant studies though there is evidence that critical brain regions as well as the structural and functional networks implicated undergo significant change in childhood and these typical developmental differences may be affected by traumatic stress. CONCLUSIONS: Future research will benefit from adopting a truly developmental approach that considers children's growth as a meaningful effect (rather than simply a covariate) interacting with traumatic stress to predict disruptions in the anatomical, functional, and connective aspects of brain systems thought to underlie the network of PTSD symptoms. Linking symptom networks with neurodevelopmental network models may be a promising avenue for future work. En ligne : https://dx.doi.org/10.1111/jcpp.12996 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=388 Deficient visuospatial working memory functions and neural correlates of the default-mode network in adolescents with autism spectrum disorder / Hsiang-Yun CHIEN in Autism Research, 9-10 (October 2016)
[article]
Titre : Deficient visuospatial working memory functions and neural correlates of the default-mode network in adolescents with autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : Hsiang-Yun CHIEN, Auteur ; Susan Shur-Fen GAU, Auteur ; Wen-Yih ISAAC TSENG, Auteur Article en page(s) : p.1058-1072 Langues : Anglais (eng) Mots-clés : autism spectrum disorder default-mode network visuospatial working memory structural connectivity functional connectivity Index. décimale : PER Périodiques Résumé : In addition to the essential features of autism spectrum disorder (ASD), namely social communication deficits and repetitive behaviors, individuals with ASD may suffer from working memory deficits and an altered default-mode network (DMN). We hypothesized that an altered DMN is related to working memory deficits in those with ASD. A total of 37 adolescents with ASD and 36 age- and IQ-matched typically developing (TD) controls were analyzed. Visuospatial working memory performance was assessed using pattern recognition memory (PRM), spatial recognition memory (SRM), and paired-associates learning (PAL) tasks. The intrinsic functional connectivity (iFC) of the DMN was indexed by the temporal correlations between the resting-state functional magnetic resonance imaging signals of pairs of DMN regions, including those between the posterior cingulate cortex (PCC) and medial prefrontal cortex (mPFC) and between the PCC and parahippocampi (PHG). The corresponding structural connectivity of the DMN was indexed by the generalized fractional anisotropy (GFA) of the dorsal and ventral cingulum bundles on the basis of diffusion spectrum imaging data. The results showed that ASD adolescents exhibited delayed correct responses in PRM and SRM tasks and committed more errors in the PAL task than the TD controls did. The delayed responses during the PRM and SRM tasks were negatively correlated with bilateral PCC–mPFC iFCs, and PAL performance was negatively correlated with right PCC–PHG iFC in ASD adolescents. Furthermore, ASD adolescents showed significant lower GFA in the right cingulum bundles than the TD group did; the GFA value was negatively correlated with SRM performance in ASD. Our results provide empirical evidence for deficient visuospatial working memory and corresponding neural correlates within the DMN in adolescents with ASD. En ligne : http://dx.doi.org/10.1002/aur.1607 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=294
in Autism Research > 9-10 (October 2016) . - p.1058-1072[article] Deficient visuospatial working memory functions and neural correlates of the default-mode network in adolescents with autism spectrum disorder [Texte imprimé et/ou numérique] / Hsiang-Yun CHIEN, Auteur ; Susan Shur-Fen GAU, Auteur ; Wen-Yih ISAAC TSENG, Auteur . - p.1058-1072.
Langues : Anglais (eng)
in Autism Research > 9-10 (October 2016) . - p.1058-1072
Mots-clés : autism spectrum disorder default-mode network visuospatial working memory structural connectivity functional connectivity Index. décimale : PER Périodiques Résumé : In addition to the essential features of autism spectrum disorder (ASD), namely social communication deficits and repetitive behaviors, individuals with ASD may suffer from working memory deficits and an altered default-mode network (DMN). We hypothesized that an altered DMN is related to working memory deficits in those with ASD. A total of 37 adolescents with ASD and 36 age- and IQ-matched typically developing (TD) controls were analyzed. Visuospatial working memory performance was assessed using pattern recognition memory (PRM), spatial recognition memory (SRM), and paired-associates learning (PAL) tasks. The intrinsic functional connectivity (iFC) of the DMN was indexed by the temporal correlations between the resting-state functional magnetic resonance imaging signals of pairs of DMN regions, including those between the posterior cingulate cortex (PCC) and medial prefrontal cortex (mPFC) and between the PCC and parahippocampi (PHG). The corresponding structural connectivity of the DMN was indexed by the generalized fractional anisotropy (GFA) of the dorsal and ventral cingulum bundles on the basis of diffusion spectrum imaging data. The results showed that ASD adolescents exhibited delayed correct responses in PRM and SRM tasks and committed more errors in the PAL task than the TD controls did. The delayed responses during the PRM and SRM tasks were negatively correlated with bilateral PCC–mPFC iFCs, and PAL performance was negatively correlated with right PCC–PHG iFC in ASD adolescents. Furthermore, ASD adolescents showed significant lower GFA in the right cingulum bundles than the TD group did; the GFA value was negatively correlated with SRM performance in ASD. Our results provide empirical evidence for deficient visuospatial working memory and corresponding neural correlates within the DMN in adolescents with ASD. En ligne : http://dx.doi.org/10.1002/aur.1607 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=294 Widespread Disrupted White Matter Microstructure in Autism Spectrum Disorders / J. FITZGERALD in Journal of Autism and Developmental Disorders, 49-7 (July 2019)
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