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Schwizer Ashkenazi S, Roell M, McCaskey U, Cachia A, Borst G, O'Gorman Tuura R, Kucian K. Are numerical abilities determined at early age? A brain morphology study in children and adolescents with and without developmental dyscalculia. Dev Cogn Neurosci 2024; 67:101369. [PMID: 38642426 PMCID: PMC11046253 DOI: 10.1016/j.dcn.2024.101369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 02/17/2024] [Accepted: 03/17/2024] [Indexed: 04/22/2024] Open
Abstract
The intraparietal sulcus (IPS) has been associated with numerical processing. A recent study reported that the IPS sulcal pattern was associated with arithmetic and symbolic number abilities in children and adults. In the present study, we evaluated the link between numerical abilities and the IPS sulcal pattern in children with Developmental Dyscalculia (DD) and typically developing children (TD), extending previous analyses considering other sulcal features and the postcentral sulcus (PoCS). First, we confirm the longitudinal sulcal pattern stability of the IPS and the PoCS. Second, we found a lower proportion of left sectioned IPS and a higher proportion of a double-horizontal IPS shape bilaterally in DD compared to TD. Third, our analyses revealed that arithmetic is the only aspect of numerical processing that is significantly related to the IPS sulcal pattern (sectioned vs not sectioned), and that this relationship is specific to the left hemisphere. And last, correlation analyses of age and arithmetic in children without a sectioned left IPS indicate that although they may have an inherent disadvantage in numerical abilities, these may improve with age. Thus, our results indicate that only the left IPS sulcal pattern is related to numerical abilities and that other factors co-determine numerical abilities.
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Affiliation(s)
- Simone Schwizer Ashkenazi
- Neuropsychology, Dept. of Psychology, University of Zurich, Zurich, Switzerland; Center for MR-Research, University Children's Hospital Zurich, Zurich, Switzerland.
| | - Margot Roell
- Université de Paris, LaPsyDÉ, CNRS, Paris F-75005, France
| | - Ursina McCaskey
- Center for MR-Research, University Children's Hospital Zurich, Zurich, Switzerland; Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Arnaud Cachia
- Université de Paris, LaPsyDÉ, CNRS, Paris F-75005, France; Université de Paris, Imaging biomarkers for brain development and disorders, UMR INSERM 1266, GHU Paris Psychiatrie & Neurosciences, Paris F-75005, France
| | - Gregoire Borst
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Ruth O'Gorman Tuura
- Center for MR-Research, University Children's Hospital Zurich, Zurich, Switzerland; Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland; Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Karin Kucian
- Center for MR-Research, University Children's Hospital Zurich, Zurich, Switzerland; Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland; Neuroscience Center Zurich, University of Zurich and Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
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Salillas E, Benavides-Varela S, Semenza C. The brain lateralization and development of math functions: progress since Sperry, 1974. Front Hum Neurosci 2023; 17:1288154. [PMID: 37964804 PMCID: PMC10641455 DOI: 10.3389/fnhum.2023.1288154] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 10/10/2023] [Indexed: 11/16/2023] Open
Abstract
In 1974, Roger Sperry, based on his seminal studies on the split-brain condition, concluded that math was almost exclusively sustained by the language dominant left hemisphere. The right hemisphere could perform additions up to sums less than 20, the only exception to a complete left hemisphere dominance. Studies on lateralized focal lesions came to a similar conclusion, except for written complex calculation, where spatial abilities are needed to display digits in the right location according to the specific requirements of calculation procedures. Fifty years later, the contribution of new theoretical and instrumental tools lead to a much more complex picture, whereby, while left hemisphere dominance for math in the right-handed is confirmed for most functions, several math related tasks seem to be carried out in the right hemisphere. The developmental trajectory in the lateralization of math functions has also been clarified. This corpus of knowledge is reviewed here. The right hemisphere does not simply offer its support when calculation requires generic space processing, but its role can be very specific. For example, the right parietal lobe seems to store the operation-specific spatial layout required for complex arithmetical procedures and areas like the right insula are necessary in parsing complex numbers containing zero. Evidence is found for a complex orchestration between the two hemispheres even for simple tasks: each hemisphere has its specific role, concurring to the correct result. As for development, data point to right dominance for basic numerical processes. The picture that emerges at school age is a bilateral pattern with a significantly greater involvement of the right-hemisphere, particularly in non-symbolic tasks. The intraparietal sulcus shows a left hemisphere preponderance in response to symbolic stimuli at this age.
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Affiliation(s)
- Elena Salillas
- Department of Psychology and Sociology, University of Zaragoza, Zaragoza, Spain
| | - Silvia Benavides-Varela
- Department of Developmental Psychology and Socialisation, University of Padova, Padua, Italy
| | - Carlo Semenza
- Padova Neuroscience Center, University of Padova, Padua, Italy
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Wilkey ED, Gupta I, Peiris A, Ansari D. The mathematical brain at rest. Curr Opin Behav Sci 2023. [DOI: 10.1016/j.cobeha.2022.101246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Suárez-Pellicioni M, Prado J, Booth JR. Neurocognitive mechanisms underlying multiplication and subtraction performance in adults and skill development in children: a scoping review. Curr Opin Behav Sci 2022. [DOI: 10.1016/j.cobeha.2022.101228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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