Near-Infrared Spectroscopy Shows Right Parietal Specialization for Number in Pre-Verbal Infants

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Near-Infrared Spectroscopy Shows Right Parietal Specialization for Number in Pre-Verbal Infants

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Title: Near-Infrared Spectroscopy Shows Right Parietal Specialization for Number in Pre-Verbal Infants
Author: Hyde, Daniel Charles; Boas, David A.; Blair, Clancy; Carey, Susan E.

Note: Order does not necessarily reflect citation order of authors.

Citation: Hyde, Daniel C., David A. Boas, Clancy Blair, and Susan Carey. Forthcoming. Near-infrared spectroscopy shows right parietal specialization for number in pre-verbal infants. NeuroImage 52.
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Abstract: Bilateral regions of the intraparietal sulcus (IPS) appear to be functionally selective for both rudimentary non-symbolic number tasks and higher-level symbolic number tasks in adults and older children. Furthermore, the ability to mentally represent and manipulate approximate non-symbolic numerical quantities is present from birth. These factors leave open whether the specialization of the IPS develops through the experience of learning a symbolic number system or if it is already specialized before symbolic number acquisition. Using the newly emerging technique of functional Near-Infrared Spectroscopy (fNIRS) over left and right parietal and lateral occipital regions, we show right parietal specialization for number in 6-month-old infants. These results extend the current literature in three ways: by successfully implementing an event-related NIRS design in infants, by showing parietal specialization for number occurs before the acquisition of language, and by suggesting number representation may be initially right lateralized and become bilateral through experience.
Published Version: doi:10.1016/j.neuroimage.2010.06.030
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4314512

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  • FAS Scholarly Articles [7220]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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