Basic number processing deficits in developmental dyscalculia: Evidence from eye tracking

2009 ◽  
Vol 24 (4) ◽  
pp. 371-386 ◽  
Author(s):  
K. Moeller ◽  
S. Neuburger ◽  
L. Kaufmann ◽  
K. Landerl ◽  
H.-C. Nuerk
Keyword(s):  
Eye Tracking ◽  
Basic Number ◽  
Number Processing ◽  
Developmental Dyscalculia ◽  
Processing Deficits

Basic number processing and difficulties in single-digit arithmetic: Evidence from Velo-Cardio-Facial Syndrome

Cortex ◽  
2009 ◽  
Vol 45 (2) ◽  
pp. 177-188 ◽  
Author(s):  
Bert De Smedt ◽  
Bert Reynvoet ◽  
Ann Swillen ◽  
Lieven Verschaffel ◽  
Bart Boets ◽  
...  
Keyword(s):  
Basic Number ◽  
Number Processing ◽  
Single Digit ◽  
Velo Cardio Facial Syndrome

Core information processing deficits in developmental dyscalculia and low numeracy

2008 ◽  
Vol 11 (5) ◽  
pp. 669-680 ◽  
Author(s):  
Teresa Iuculano ◽  
Joey Tang ◽  
Charles W.B. Hall ◽  
Brian Butterworth
Keyword(s):  
Information Processing ◽  
Developmental Dyscalculia ◽  
Processing Deficits ◽  
Information Processing Deficits

Number Processing and Arithmetic in Children and Adults with Reading Difficulties

2014 ◽  
Author(s):  
Silke M. Göbel
Keyword(s):  
Reading Difficulties ◽  
Basic Number ◽  
Number Processing ◽  
Angular Gyrus ◽  
Long Term Memory ◽  
Co Morbidity ◽  
And Mathematics ◽  
A Site ◽  
Left Angular Gyrus ◽  
Fact Retrieval

Basic number processing skills in individuals with reading difficulties (RD) are intact. However, children and adults with RD show clear difficulties in arithmetic, in particular in retrieving known answers from long-term memory (fact retrieval). Fact retrieval deficits are associated with weaknesses in phonological awareness, the ability to segment and manipulate speech sounds. The left angular gyrus has been suggested as a site of neurological overlap between RD and fact retrieval deficits. While there is evidence for an involvement of the angular gyrus in fact retrieval in adults, the evidence for children is less clear. The same genetic risk factors may underlie difficulties in reading and mathematics and cause the high co-morbidity between RD and mathematical difficulties. Implications for interventions are discussed.

Neural Correlates of Symbolic Number Comparison in Developmental Dyscalculia

2010 ◽  
Vol 22 (5) ◽  
pp. 860-874 ◽  
Author(s):  
Christophe Mussolin ◽  
Anne De Volder ◽  
Cécile Grandin ◽  
Xavier Schlögel ◽  
Marie-Cécile Nassogne ◽  
...  
Keyword(s):  
Number Processing ◽  
Numerical Distance ◽  
Comparison Task ◽  
Developmental Dyscalculia ◽  
Disability History ◽  
Magnitude Processing ◽  
Number Magnitude ◽  
Number Comparison ◽  
The Right ◽  
Symbolic Number

Developmental dyscalculia (DD) is a deficit in number processing and arithmetic that affects 3–6% of schoolchildren. The goal of the present study was to analyze cerebral bases of DD related to symbolic number processing. Children with DD aged 9–11 years and matched children with no learning disability history were investigated using fMRI. The two groups of children were controlled for general cognitive factors, such as working memory, reading abilities, or IQ. Brain activations were measured during a number comparison task on pairs of Arabic numerals and a color comparison task on pairs of nonnumerical symbols. In each task, pairs of stimuli that were close or far on the relevant dimension were constituted. Brain activation in bilateral intraparietal sulcus (IPS) was modulated by numerical distance in controls but not in children with DD. Moreover, although the right IPS responded to numerical distance only, the left IPS was influenced by both numerical and color distances in control children. Our findings suggest that dyscalculia is associated with impairment in areas involved in number magnitude processing and, to a lesser extent, in areas dedicated to domain-general magnitude processing.

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