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Behavioural Neurology
Volume 9 (1996), Issue 3-4, Pages 163-170
Case Report

Crossed Aphasia. II: Why Are Deep Lesions Overrepresented with Respect to Standard Aphasia?

M. Laiacona,1,2 E. Capitani,2 C. Stangalino,1 and L. Lorenzi1

1Neuropsychology Unit, Neurology Department, Salvatore Maugeri Clinica del Lavoro Foundation, Medical Centre of Rehabilitation, Veruno (NO), Italy
2Milan University, Clinic for Nervous Diseases, S. Paolo Hospital, Milan, Italy
3Servizio di Neuropsicologia della Fondazione S. Maugeri Clinica del Lavoro, Istituto di Ricovero e Cura a Carattere Scientifico, Centro Medico di Riabilitazione di Veruno (NO), Italy

Copyright © 1996 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this paper we have reviewed the cases of vascular crossed aphasia reported in the literature, in order to check whether deep lesions are really overrepresented in crossed aphasia with respect to standard aphasia. The comparison with a large sample of standard left-hemisphere-damaged aphasics revealed a significantly higher incidence of purely deep lesions in crossed aphasics than in standard aphasics. The overrepresentation of deep lesions in crossed aphasia appears to be contingent on the co-occurrence of aphasia and Unilateral Neglect after right-hemisphere lesion. This suggests an interaction between language and attentional mechanisms in the case of reversed language lateralisation: the overcrowding of these functions in the right hemisphere could make language more vulnerable after right deep lesions.