scholarly journals Early visual deprivation does not prevent the emergence of basic numerical abilities in blind children

Cognition ◽  
2021 ◽  
Vol 210 ◽  
pp. 104586
Author(s):  
Virginie Crollen ◽  
Hélène Warusfel ◽  
Marie-Pascale Noël ◽  
Olivier Collignon
Keyword(s):  
Visual Deprivation ◽  
Numerical Abilities ◽  
Blind Children

scholarly journals Superior numerical abilities following early visual deprivation

Cortex ◽  
2013 ◽  
Vol 49 (5) ◽  
pp. 1435-1440 ◽  
Author(s):  
Julie Castronovo ◽  
Jean-François Delvenne
Keyword(s):  
Visual Deprivation ◽  
Numerical Abilities

scholarly journals Multisystemic Increment of Cortical Thickness in Congenital Blind Children

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Alberto Inuggi ◽  
Anna Pichiecchio ◽  
Benedetta Ciacchini ◽  
Sabrina Signorini ◽  
Federica Morelli ◽  
...  
Keyword(s):  
Cortical Thickness ◽  
Visual Experience ◽  
Low Vision ◽  
Physiological Mechanism ◽  
Visual Deprivation ◽  
Cortical Surface ◽  
Blind Children ◽  
Neural Growth ◽  
The Brain ◽  
Ct Studies

Abstract It has been shown that the total or partial lack of visual experience is associated with a plastic reorganization at the brain level, more prominent in congenital blind. Cortical thickness (CT) studies, to date involving only adult subjects, showed that only congenital blind have a thicker cortex than age-matched sighted population while late blind do not. This was explained as a deviation from the physiological mechanism of initial neural growth followed by a pruning mechanism that, in congenital blind children, might be reduced by their visual deprivation, thus determining a thicker cortex. Since those studies involved only adults, it is unknown when these changes may appear and whether they are related to impairment degree. To address this question, we compared the CT among 28 children, from 2 to 12 years, with congenital visual impairments of different degree and an age-matched sighted population. Vertex-wise analysis showed that blind children, but not low vision one, had a thicker cortical surface in few clusters located in occipital, superior parietal, anterior-cingular, orbito-frontal, and mesial precentral regions. Our data suggest that the effect of visual impairment on determining thicker cortex is an early phenomenon, is multisystemic, and occurs only when blindness is almost complete.

scholarly journals Early visual deprivation does not prevent the emergence of basic numerical abilities in blind children.

2021 ◽  
Author(s):  
Virginie Crollen ◽  
Hélène Warusfel ◽  
Marie-Pascale Noël ◽  
Olivier Collignon
Keyword(s):  
Working Memory ◽  
Visual Experience ◽  
Spatial Working Memory ◽  
Mental Arithmetic ◽  
Verbal Working Memory ◽  
Phonological Loop ◽  
Spatial Span ◽  
Numerical Abilities ◽  
Blind Children ◽  
Congenitally Blind

Studies involving congenitally blind adults demonstrated that visual experience is not a mandatory prerequisite for the emergence of efficient numerical abilities. It remains however unknown whether blind adults developed lifelong strategies to compensate for the absence of foundations vision would provide in infancy. We therefore assessed basic numerical abilities in blind and sighted children of 6 to 13 years old. We also assessed verbal and spatial working memory abilities and their relationship with mental arithmetic in both groups. Blind children showed similar or better numerical abilities as compared to the sighted. Blind children also outperformed their sighted peers in every task assessing verbal working memory and demonstrated a similar spatial span. The correlation between arithmetic and the spatial sketchpad was affected by the group while the correlations between arithmetic and the other two components (the central executive and the phonological loop) were not affected by early visual experience. Our data suggest that early blindness does not impair the development of basic numerical competencies in children but influences the associations between arithmetic and some working memory components.

Metaphor Comprehension By The Congenitally Blind Children

2017 ◽  
pp. 1
Author(s):  
عالية بدر عبدالله ◽  
ضيف الله زامل حربي
Keyword(s):  
Metaphor Comprehension ◽  
Blind Children ◽  
Congenitally Blind
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