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The abstraction of numerical relations: A role for the right hemisphere in arithmetic?

Published online by Cambridge University Press:  01 May 1997

DAWN W. LANGDON  and
ELIZABETH K. WARRINGTON
DAWN W. LANGDON
Affiliation:
The National Hospital for Neurology & Neurosurgery and the Institute of Neurology, Queen Square, London WC1N 3BG, England
ELIZABETH K. WARRINGTON
Affiliation:
The National Hospital for Neurology & Neurosurgery and the Institute of Neurology, Queen Square, London WC1N 3BG, England
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Abstract

Arithmetical reasoning ability has been investigated in a group study of patients with unilateral cerebral lesions. Two series of 38 and 39 patients, who had suffered unilateral cerebral lesions of the right and left cerebral hemisphere, respectively, were investigated. They completed a neuropsychological battery that included a test of computation (Graded Difficulty Arithmetic, GDA; Jackson & Warrington, 1986), and a new test of numerical series completion (Arithmetical Reasoning Test, ART). Whereas the left-hemisphere lesion group were markedly more impaired on the GDA compared to both the right-hemisphere lesion group and a standardization sample, both lesion groups were equally severely impaired on the ART. It is suggested that the abstraction of numerical relations, which is essential to numerical series completion, relies on the integrity of the right hemisphere. A global model of arithmetic processing that incorporates these findings is proposed. (JINS, 1997, 3, 260–268.)

Keywords

DyscalculiaRight hemisphereArithmetic
Type
Research Article
Information
Journal of the International Neuropsychological Society , Volume 3 , Issue 3 , May 1997 , pp. 260 - 268
Copyright
© 1997 The International Neuropsychological Society

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