RESUMO
PURPOSE: To assess the effectiveness of slow repetitive transcranial magnetic stimulation (rTMS) as an adjunctive treatment for drug-resistant epilepsy. METHODS: Forty-three patients with drug-resistant epilepsy from eight Italian Centers underwent a randomized, double-blind, sham-controlled, crossover study on the clinical and EEG effects of slow rTMS. The stimulus frequency was 0.3 Hz. One thousand stimuli per day were given at the resting motor threshold intensity for 5 consecutive days, with a round coil at the vertex. RESULTS: "Active" rTMS was no better than placebo for seizure reduction. However, it decreased interictal EEG epileptiform abnormalities significantly (p < 0.05) in one-third of the patients, which supports a detectable biologic effect. No correlation linked the rTMS effects on seizure frequency to syndrome or anatomic classification, seizure type, EEG changes, or resting motor threshold (an index of motor cortex excitability). CONCLUSIONS: Although the antiepileptic action was not significant (p > 0.05), the individual EEG reactivity to "active" rTMS may be encouraging for the development of more-powerful, noninvasive neuromodulatory strategies.
Assuntos
Eletroencefalografia/estatística & dados numéricos , Epilepsia/terapia , Estimulação Magnética Transcraniana/métodos , Adulto , Estudos de Coortes , Estudos Cross-Over , Método Duplo-Cego , Resistência a Medicamentos , Epilepsia/diagnóstico , Epilepsia/fisiopatologia , Epilepsia do Lobo Temporal/diagnóstico , Epilepsia do Lobo Temporal/fisiopatologia , Epilepsia do Lobo Temporal/terapia , Feminino , Humanos , Masculino , Neocórtex/fisiopatologia , Placebos , Tamanho da Amostra , Resultado do TratamentoRESUMO
Movement disorders have been reported with use of different antiepileptic drugs (AEDs). We report a 32-year-old woman, affected by a symptomatic focal drug-resistant epilepsy and a mild hemiparesis, with acute athetoid movements, transiently linked to increasing tiagabine (TGB) therapy. To our knowledge, no other cases of acute athetosis related to TGB have been reported to date. However, we cannot rule out the possibility that involuntary movements were induced by an interaction between TGB and concomitant AEDs, in particular phenobarbital (PB), possibly by increasing GABAergic transmission. We hypothesize that the presence of a static encephalopathy may have influenced the kind of extrapyramidal side effect induced by TGB in our patient, leading to athetosis.