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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.49 no.4 São Paulo Dec. 1991 



Hemispheric specialization in partial epilepsy role of dichotic listening cv task and central audiological evaluation in the neuropsychological assessment


Especializarão hemisférica na epilepsia parcial: papel da prova de estimulação dicótica CV e da avaliação audiológica central na apreciação do desempenho neuropsicológico



Mauro Muszkat; Neyde Santacchi de Vincenzo; Denilce Oliveira Reami; Clemente I. Ribeiro de Almeida; Maria I. Campos; Carlos J. Reis de Campos

Setor de Investigação e Tratamento das Epilepsias, Disciplina de Neurologia, Escola Paulista de Medicina (EGM). This research was supported in part by grant from CNPq




We studied 49 patients with partial epilepsy divided into lesional cases (i.e. with lesions on CT scan) and non-lesional cases (i.e. without CT scan lesions), in relation to the Wechsler Intelligence Scale subtests (Coding, Digit span), dichotic listening CV task and Central Auditory Test (SSI, PSI). The aim of this paper was to study the hemispheric prevalence in dichotic listening task with regard to cognitive perforamance, as well as the presence or absence of central auditory dysfunction. Lesional cases presented a hemisphere prevalence in dichotic listening task with regard to cognitive performance, as well as the non-lesional cases tend to report the stimuli in the same side of EEC focus. Significant differences were found among the lesional and non lesional cases in relation to the digit span score and Coding subtest in right lesional cases versus right non-lesional cases. Both lesional and non-lesional group showed signs of central auditory dysfunction. We suggest that the dichotic listening and SSI and PSI test can be useful for a best comprehension of asymmetric neuropsychological performance in partial epilepsy.


Foram avaliados 49 pacientes com epilepsia parcial, divididos em dois grupos que incluiam casos lesionais (com lesão estrutural à TCC e casos não lesionais (sem lesão à TCC). Os pacientes foram submetidos à prova de estimulação dicótica consoante-vogal (c-v), a teste autidivo central (Jerger - SSI e PSI) e à escala de Inteligência Wechsler. O objetivo do estudo foi analisar a preferência hemisférica em provas de estimulação dicótica em relação ao desempenho cognitivo bem como a presença ou ausência de disfunção auditiva central. Os casos com epilepsia parcial lesionai apresentaram preferência hemisférica à prova de estimulação no lado oposto à lesão cerebral, enquanto os casos não lesionais apresentaram preferência hemisférica no mesmo lado do foco elentrencefalográfico. Com relação ao desempenho nos sub-testes do Wechsler, observamos que os casos lesionais com foco no hemisfério direito apresentaram menor desempenho nos subtestes relacionados a atenção/concentração e memória imediata (subtestes: Código e Dígitos). Tanto os casos lesionais como os não lesionais apresentaram sinais de disfunção auditiva central. Os autores sugerem que os testes de estimulação dicótica aliados à bateria cognitiva e à avaliação auditiva central podem ser considerados instrumentos úteis no estudo da assimetria funcional hemisférica em pacientes com epilepsia parcial.



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Dr. Carlos José Reis de Campos - Disciplina de Neurologia Escola Paulista de Medicina - Rua Botucatu 740 - 04023 São Paulo SP - Brasil.

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