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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 Enhanced Early Visual Responses During Implicit Emotional Faces Processing in Autism Spectrum Disorder / K. KOVARSKI in Journal of Autism and Developmental Disorders, 49-3 (March 2019)
[article]
Titre : Enhanced Early Visual Responses During Implicit Emotional Faces Processing in Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : K. KOVARSKI, Auteur ; R. MENNELLA, Auteur ; S. M. WONG, Auteur ; B. T. DUNKLEY, Auteur ; M. J. TAYLOR, Auteur ; Magali BATTY, Auteur Article en page(s) : p.871-886 Langues : Anglais (eng) Mots-clés : Autism Emotion Face processing Meg Visual processing Index. décimale : PER Périodiques Résumé : Research on Autism Spectrum Disorder (ASD) has focused on processing of socially-relevant stimuli, such as faces. Nonetheless, before being 'social', faces are visual stimuli. The present magnetoencephalography study investigated the time course of brain activity during an implicit emotional task in visual emotion-related regions in 19 adults with ASD (mean age 26.3 +/- 4.4) and 19 typically developed controls (26.4 +/- 4). The results confirmed previously-reported differences between groups in brain responses to emotion and a hypo-activation in the ASD group in the right fusiform gyrus around 150 ms. However, the ASD group also presented early enhanced activity in the occipital region. These results support that impaired face processing in ASD might be sustained by atypical responses in primary visual areas. En ligne : http://dx.doi.org/10.1007/s10803-018-3787-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386
in Journal of Autism and Developmental Disorders > 49-3 (March 2019) . - p.871-886[article] Enhanced Early Visual Responses During Implicit Emotional Faces Processing in Autism Spectrum Disorder [Texte imprimé et/ou numérique] / K. KOVARSKI, Auteur ; R. MENNELLA, Auteur ; S. M. WONG, Auteur ; B. T. DUNKLEY, Auteur ; M. J. TAYLOR, Auteur ; Magali BATTY, Auteur . - p.871-886.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 49-3 (March 2019) . - p.871-886
Mots-clés : Autism Emotion Face processing Meg Visual processing Index. décimale : PER Périodiques Résumé : Research on Autism Spectrum Disorder (ASD) has focused on processing of socially-relevant stimuli, such as faces. Nonetheless, before being 'social', faces are visual stimuli. The present magnetoencephalography study investigated the time course of brain activity during an implicit emotional task in visual emotion-related regions in 19 adults with ASD (mean age 26.3 +/- 4.4) and 19 typically developed controls (26.4 +/- 4). The results confirmed previously-reported differences between groups in brain responses to emotion and a hypo-activation in the ASD group in the right fusiform gyrus around 150 ms. However, the ASD group also presented early enhanced activity in the occipital region. These results support that impaired face processing in ASD might be sustained by atypical responses in primary visual areas. En ligne : http://dx.doi.org/10.1007/s10803-018-3787-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386 Local and Global Visual Processing in Autism Spectrum Disorders: Influence of Task and Sample Characteristics and Relation to Symptom Severity / L. VAN EYLEN in Journal of Autism and Developmental Disorders, 48-4 (April 2018)
[article]
Titre : Local and Global Visual Processing in Autism Spectrum Disorders: Influence of Task and Sample Characteristics and Relation to Symptom Severity Type de document : Texte imprimé et/ou numérique Auteurs : L. VAN EYLEN, Auteur ; Bart BOETS, Auteur ; J. STEYAERT, Auteur ; J. WAGEMANS, Auteur ; I. NOENS, Auteur Article en page(s) : p.1359-1381 Langues : Anglais (eng) Mots-clés : Autism spectrum disorders Global processing Local processing Sample characteristics Symptom severity Visual processing Index. décimale : PER Périodiques Résumé : Local and global visual processing abilities and processing style were investigated in individuals with autism spectrum disorder (ASD) versus typically developing individuals, children versus adolescents and boys versus girls. Individuals with ASD displayed more attention to detail in daily life, while laboratory tasks showed slightly reduced global processing abilities, intact local processing abilities, and a more locally oriented processing style. However, the presence of these group differences depended on particular task and sample (i.e., age and gender) characteristics. Most measures of local and global processing did not correlate with each other and were not associated with processing style. Significant associations between local-global processing and ASD symptom severity were observed, but the causality of these associations remains unclear. En ligne : http://dx.doi.org/10.1007/s10803-015-2526-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=352
in Journal of Autism and Developmental Disorders > 48-4 (April 2018) . - p.1359-1381[article] Local and Global Visual Processing in Autism Spectrum Disorders: Influence of Task and Sample Characteristics and Relation to Symptom Severity [Texte imprimé et/ou numérique] / L. VAN EYLEN, Auteur ; Bart BOETS, Auteur ; J. STEYAERT, Auteur ; J. WAGEMANS, Auteur ; I. NOENS, Auteur . - p.1359-1381.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 48-4 (April 2018) . - p.1359-1381
Mots-clés : Autism spectrum disorders Global processing Local processing Sample characteristics Symptom severity Visual processing Index. décimale : PER Périodiques Résumé : Local and global visual processing abilities and processing style were investigated in individuals with autism spectrum disorder (ASD) versus typically developing individuals, children versus adolescents and boys versus girls. Individuals with ASD displayed more attention to detail in daily life, while laboratory tasks showed slightly reduced global processing abilities, intact local processing abilities, and a more locally oriented processing style. However, the presence of these group differences depended on particular task and sample (i.e., age and gender) characteristics. Most measures of local and global processing did not correlate with each other and were not associated with processing style. Significant associations between local-global processing and ASD symptom severity were observed, but the causality of these associations remains unclear. En ligne : http://dx.doi.org/10.1007/s10803-015-2526-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=352 Spatial localisation in autism: evidence for differences in early cortical visual processing / Keziah LATHAM in Molecular Autism, (February 2013)
[article]
Titre : Spatial localisation in autism: evidence for differences in early cortical visual processing Type de document : Texte imprimé et/ou numérique Auteurs : Keziah LATHAM, Auteur ; Susana T.L. CHUNG, Auteur ; Peter M. ALLEN, Auteur ; Teresa TAVASSOLI, Auteur ; Simon BARON-COHEN, Auteur Année de publication : 2013 Article en page(s) : 4 p. Langues : Anglais (eng) Mots-clés : Autism spectrum conditions Spatial vision Vernier acuity Hyperacuity Psychophysics Visual processing Index. décimale : PER Périodiques Résumé : Background
Vision in people with autism spectrum conditions (ASC) is reported to be different from people without ASC, but the neural level at which the differences begin to occur is not yet known. Here we examine two variants of a vernier acuity task to determine if differences are evident in early visual processing.
Findings
Abutting and separated vernier acuity was assessed in 16 people with ASC and 14 matched controls. In controls, abutting and separated thresholds were unrelated (r = 0.13, p = 0.65), suggesting thresholds are determined by two separate mechanisms. In contrast, the abutting and separated thresholds of ASC observers were strongly correlated (r = 0.88, p < 0.0001), with separated thresholds tending towards being superior to those of controls [t(28) = ?2.46, p = 0.02].
Conclusions
The findings suggest the mechanisms employed by ASC observers in separated vernier tasks are different to those of controls. This psychophysical evidence suggests that visual differences in ASC may begin at an early cortical stage of visual processing.En ligne : http://dx.doi.org/10.1186/2040-2392-4-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202
in Molecular Autism > (February 2013) . - 4 p.[article] Spatial localisation in autism: evidence for differences in early cortical visual processing [Texte imprimé et/ou numérique] / Keziah LATHAM, Auteur ; Susana T.L. CHUNG, Auteur ; Peter M. ALLEN, Auteur ; Teresa TAVASSOLI, Auteur ; Simon BARON-COHEN, Auteur . - 2013 . - 4 p.
Langues : Anglais (eng)
in Molecular Autism > (February 2013) . - 4 p.
Mots-clés : Autism spectrum conditions Spatial vision Vernier acuity Hyperacuity Psychophysics Visual processing Index. décimale : PER Périodiques Résumé : Background
Vision in people with autism spectrum conditions (ASC) is reported to be different from people without ASC, but the neural level at which the differences begin to occur is not yet known. Here we examine two variants of a vernier acuity task to determine if differences are evident in early visual processing.
Findings
Abutting and separated vernier acuity was assessed in 16 people with ASC and 14 matched controls. In controls, abutting and separated thresholds were unrelated (r = 0.13, p = 0.65), suggesting thresholds are determined by two separate mechanisms. In contrast, the abutting and separated thresholds of ASC observers were strongly correlated (r = 0.88, p < 0.0001), with separated thresholds tending towards being superior to those of controls [t(28) = ?2.46, p = 0.02].
Conclusions
The findings suggest the mechanisms employed by ASC observers in separated vernier tasks are different to those of controls. This psychophysical evidence suggests that visual differences in ASC may begin at an early cortical stage of visual processing.En ligne : http://dx.doi.org/10.1186/2040-2392-4-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202 Effect of Visual Information on Postural Control in Adults with Autism Spectrum Disorder / Y. H. LIM in Journal of Autism and Developmental Disorders, 49-12 (December 2019)
[article]
Titre : Effect of Visual Information on Postural Control in Adults with Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Y. H. LIM, Auteur ; H. C. LEE, Auteur ; T. FALKMER, Auteur ; Garry T. ALLISON, Auteur ; T. TAN, Auteur ; W. L. LEE, Auteur ; S. L. MORRIS, Auteur Article en page(s) : p.4731-4739 Langues : Anglais (eng) Mots-clés : Attention Autistic disorder Postural balance Sensorimotor Sensory information Visual processing Index. décimale : PER Périodiques Résumé : Sensory processing difficulties affect the development of sensorimotor skills in individuals with autism spectrum disorder (ASD). However, the effect of sensory information on postural control is unclear in the ASD adult population. The present study examined the effect of visual information on postural control as well as the attentional demands associated with postural control in fourteen adults with ASD and seventeen typically developed adults. The results showed that postural sway and attention demands of postural control were larger in adults with ASD than in typically developed adults. These findings indicate that visual processing used for postural control may be different in adults with ASD. Further research in visual field processing and visual motion processing may elucidate these sensorimotor differences. En ligne : http://dx.doi.org/10.1007/s10803-018-3634-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=411
in Journal of Autism and Developmental Disorders > 49-12 (December 2019) . - p.4731-4739[article] Effect of Visual Information on Postural Control in Adults with Autism Spectrum Disorder [Texte imprimé et/ou numérique] / Y. H. LIM, Auteur ; H. C. LEE, Auteur ; T. FALKMER, Auteur ; Garry T. ALLISON, Auteur ; T. TAN, Auteur ; W. L. LEE, Auteur ; S. L. MORRIS, Auteur . - p.4731-4739.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 49-12 (December 2019) . - p.4731-4739
Mots-clés : Attention Autistic disorder Postural balance Sensorimotor Sensory information Visual processing Index. décimale : PER Périodiques Résumé : Sensory processing difficulties affect the development of sensorimotor skills in individuals with autism spectrum disorder (ASD). However, the effect of sensory information on postural control is unclear in the ASD adult population. The present study examined the effect of visual information on postural control as well as the attentional demands associated with postural control in fourteen adults with ASD and seventeen typically developed adults. The results showed that postural sway and attention demands of postural control were larger in adults with ASD than in typically developed adults. These findings indicate that visual processing used for postural control may be different in adults with ASD. Further research in visual field processing and visual motion processing may elucidate these sensorimotor differences. En ligne : http://dx.doi.org/10.1007/s10803-018-3634-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=411 Effect of Visual Information on Postural Control in Children with Autism Spectrum Disorder / Yi Huey LIM in Journal of Autism and Developmental Disorders, 50-9 (September 2020)
PermalinkVisual Search Targeting Either Local or Global Perceptual Processes Differs as a Function of Autistic-Like Traits in the Typically Developing Population / Renita A. ALMEIDA in Journal of Autism and Developmental Disorders, 43-6 (June 2013)
PermalinkVisual working memory performance is intact across development in autism spectrum disorder / Andrew LYNN in Autism Research, 15-5 (May 2022)
PermalinkEffortful and Automatic Information Processing in Boys with ADHD and Specific Learning Disorders / Philip L. HAZELL in Journal of Child Psychology and Psychiatry, 40-2 (February 1999)
PermalinkGaze and social functioning associations in autism spectrum disorder: A systematic review and meta-analysis / Jacqueline A. RIDDIFORD in Autism Research, 15-8 (August 2022)
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