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Arquivos de Neuro-Psiquiatria

versão impressa ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.53 no.2 São Paulo jun. 1995

http://dx.doi.org/10.1590/S0004-282X1995000200015 

Dipole reversal: an ictal feature in a patient with benign partial epilepsy of childhood with centrotemporal spike

 

Reversão de dipolo: um achado crítico em um paciente com epilepsia parcial benigna da infância com ponta centrotemporal

 

 

Délrio F. SilvaI; Márcia Marques LimaII; Renato AnghinahII; Edma R ZanoteliIII; José Geraldo C. LimaIV

IHead of the EEG Sector, Escola Paulista de Medicina (EPM)
IIJunior Doctor of the EEG Sector
IIIResident in Neurology
IVFull Professor and Head of the Discipline of Neurology, EPM

 

 


SUMMARY

We describe the case of a 15-year-old boy who had the diagnosis of benign partial epilepsy of childhood with centrotemporal spike. During the EEG a subclinical electrographic seizure was recorded. The discharges were clearly electropositive in T4 with positive phase reversal between derivations F8-T4 and T4-T6. The whole episode lasted less than one minute (45 sec). The interictal right medio-temporal spikes reemerged after 60 sec and were electronegative in the same location after the end of the electrographic seizures. The mechanisms underlying this uncommon pattern on EEG is not well stablished.

Key words:EEG, dipole reversal, benign partial epilepsy of childhood with centrotemporal spike.


RESUMO

Relatamos o caso de um menino de 15 anos com o diagnóstico de epilepsia parcial benigna da infância com ponta centrotemporal. Durante o EEG uma crise eletrográfica subclínica foi gravada. As descargas estavam eletropositivas em T4 com reversão de fase positiva entre as derivações F8-T4 e T4-T6. O episódio durou menos que um minuto (45 seg). As espículas inter-ictais, na região temporal média direita, reapareceram 60 seg após e estavam eletronegativas na mesma região depois do término da crise eletrográfica. O mecanismo subjacente a este padrão incomum no EEG não está bem estabelecido.

Palavras-chave: EEG, reversão de dipolo, epilepsia parcial benigna da infância com ponta centrotemporal.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

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Aceite: 2-janeiro-1995.

 

 

Dr. Délrio Façanha da Silva - Disciplina de Neurologia, Setor de Eletrencefalografia, Escola Paulista de Medicina - Rua Botucatu 740 - 04023-900 São Paulo SP - Brasil.