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Détail de l'auteur
Auteur M. H. CABARAL |
Documents disponibles écrits par cet auteur (2)
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A cross-sectional study of the development of volitional control of spatial attention in children with chromosome 22q11.2 deletion syndrome / H. M. SHAPIRO in Journal of Neurodevelopmental Disorders, 4-1 (December 2012)
[article]
Titre : A cross-sectional study of the development of volitional control of spatial attention in children with chromosome 22q11.2 deletion syndrome Type de document : Texte imprimé et/ou numérique Auteurs : H. M. SHAPIRO, Auteur ; Y. TAKARAE, Auteur ; D. J. HARVEY, Auteur ; M. H. CABARAL, Auteur ; T. J. SIMON, Auteur Article en page(s) : p.5 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : BACKGROUND: Chromosome 22q11.2 deletion syndrome (22q11.2DS) results from a 1.5- to 3-megabase deletion on the long arm of chromosome 22 and occurs in approximately 1 in 4000 live births. Previous studies indicate that children with 22q11.2DS are impaired on tasks involving spatial attention. However, the degree to which these impairments are due to volitionally generated (endogenous) or reflexive (exogenous) orienting of attention is unclear. Additionally, the efficacy of these component attention processes throughout child development in 22q11.2DS has yet to be examined. METHODS: Here we compared the performance of a wide age range (7 to 14 years) of children with 22q11.2DS to typically developing (TD) children on a comprehensive visual cueing paradigm to dissociate the contributions of endogenous and exogenous attentional impairments. Paired and two-sample t-tests were used to compare outcome measures within a group or between groups. Additionally, repeated measures regression models were fit to the data in order to examine effects of age on performance. RESULTS: We found that children with 22q11.2DS were impaired on a cueing task with an endogenous cue, but not on the same task with an exogenous cue. Additionally, it was younger children exclusively who were impaired on endogenous cueing when compared to age-matched TD children. Older children with 22q11.2DS performed comparably to age-matched TD peers on the endogenous cueing task. CONCLUSIONS: These results suggest that endogenous but not exogenous orienting of attention is selectively impaired in children with 22q11.2DS. Additionally, the age effect on cueing in children with 22q11.2DS suggests a possible altered developmental trajectory of endogenous cueing. En ligne : http://dx.doi.org/10.1186/1866-1955-4-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=344
in Journal of Neurodevelopmental Disorders > 4-1 (December 2012) . - p.5[article] A cross-sectional study of the development of volitional control of spatial attention in children with chromosome 22q11.2 deletion syndrome [Texte imprimé et/ou numérique] / H. M. SHAPIRO, Auteur ; Y. TAKARAE, Auteur ; D. J. HARVEY, Auteur ; M. H. CABARAL, Auteur ; T. J. SIMON, Auteur . - p.5.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 4-1 (December 2012) . - p.5
Index. décimale : PER Périodiques Résumé : BACKGROUND: Chromosome 22q11.2 deletion syndrome (22q11.2DS) results from a 1.5- to 3-megabase deletion on the long arm of chromosome 22 and occurs in approximately 1 in 4000 live births. Previous studies indicate that children with 22q11.2DS are impaired on tasks involving spatial attention. However, the degree to which these impairments are due to volitionally generated (endogenous) or reflexive (exogenous) orienting of attention is unclear. Additionally, the efficacy of these component attention processes throughout child development in 22q11.2DS has yet to be examined. METHODS: Here we compared the performance of a wide age range (7 to 14 years) of children with 22q11.2DS to typically developing (TD) children on a comprehensive visual cueing paradigm to dissociate the contributions of endogenous and exogenous attentional impairments. Paired and two-sample t-tests were used to compare outcome measures within a group or between groups. Additionally, repeated measures regression models were fit to the data in order to examine effects of age on performance. RESULTS: We found that children with 22q11.2DS were impaired on a cueing task with an endogenous cue, but not on the same task with an exogenous cue. Additionally, it was younger children exclusively who were impaired on endogenous cueing when compared to age-matched TD children. Older children with 22q11.2DS performed comparably to age-matched TD peers on the endogenous cueing task. CONCLUSIONS: These results suggest that endogenous but not exogenous orienting of attention is selectively impaired in children with 22q11.2DS. Additionally, the age effect on cueing in children with 22q11.2DS suggests a possible altered developmental trajectory of endogenous cueing. En ligne : http://dx.doi.org/10.1186/1866-1955-4-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=344 Impaired multiple object tracking in children with chromosome 22q11.2 deletion syndrome / M. H. CABARAL in Journal of Neurodevelopmental Disorders, 4-1 (December 2012)
[article]
Titre : Impaired multiple object tracking in children with chromosome 22q11.2 deletion syndrome Type de document : Texte imprimé et/ou numérique Auteurs : M. H. CABARAL, Auteur ; Elliott A. BEATON, Auteur ; J. STODDARD, Auteur ; T. J. SIMON, Auteur Article en page(s) : p.6 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : BACKGROUND: Chromosome 22q11.2 Deletion Syndrome (22q11.2DS) occurs in approximately 1:4,000 live births with a complex and variable presentation that includes medical, socioemotional and psychological symptoms with intellectual impairment. Cognitive impairments in spatiotemporal and visuospatial attention have also been reported. However, maintenance of selective attention to dynamic and interacting objects has not been systematically investigated in children with 22q11.2DS. METHODS: We used a multiple object tracking task to assay capacity and resolution performance of children with 22q11.2DS aged 7 to 14 years versus age-matched typically developing (TD) peers. RESULTS: Children with 22q11.2DS but not TD children demonstrated impaired performance when task demands increased due to an increase in the number of targets presented, but not from an increase in object speed. Task performance in children with 22q11.2DS was also unrelated to intelligence or measures of attention deficit hyperactivity disorder. CONCLUSIONS: These findings suggest that children with 22q11.2DS may be particularly susceptible to dynamic crowding of objects with increasing cognitive demands related to monitoring multiple targets reflecting a reduced acuity in spatiotemporal cognitive representation. En ligne : http://dx.doi.org/10.1186/1866-1955-4-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=344
in Journal of Neurodevelopmental Disorders > 4-1 (December 2012) . - p.6[article] Impaired multiple object tracking in children with chromosome 22q11.2 deletion syndrome [Texte imprimé et/ou numérique] / M. H. CABARAL, Auteur ; Elliott A. BEATON, Auteur ; J. STODDARD, Auteur ; T. J. SIMON, Auteur . - p.6.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 4-1 (December 2012) . - p.6
Index. décimale : PER Périodiques Résumé : BACKGROUND: Chromosome 22q11.2 Deletion Syndrome (22q11.2DS) occurs in approximately 1:4,000 live births with a complex and variable presentation that includes medical, socioemotional and psychological symptoms with intellectual impairment. Cognitive impairments in spatiotemporal and visuospatial attention have also been reported. However, maintenance of selective attention to dynamic and interacting objects has not been systematically investigated in children with 22q11.2DS. METHODS: We used a multiple object tracking task to assay capacity and resolution performance of children with 22q11.2DS aged 7 to 14 years versus age-matched typically developing (TD) peers. RESULTS: Children with 22q11.2DS but not TD children demonstrated impaired performance when task demands increased due to an increase in the number of targets presented, but not from an increase in object speed. Task performance in children with 22q11.2DS was also unrelated to intelligence or measures of attention deficit hyperactivity disorder. CONCLUSIONS: These findings suggest that children with 22q11.2DS may be particularly susceptible to dynamic crowding of objects with increasing cognitive demands related to monitoring multiple targets reflecting a reduced acuity in spatiotemporal cognitive representation. En ligne : http://dx.doi.org/10.1186/1866-1955-4-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=344