The origin of the focal spike in musicogenic epilepsy.

To clarify the pathogenesis of a typical case of musicogenic epilepsy, we examined interictal spikes using the dipole tracing method (DTM). The patient was a 49-year-old, right-handed Japanese man. He first experienced seizures at the age of 32 years; listening to his favorite piece of music frequently triggered them.

Electroencephalogram-triggered functional magnetic resonance imaging in focal epilepsy.

The high spatial resolution and cost performance of functional magnetic resonance imaging (fMRI) is useful for estimating focus localization in epilepsy, but this is difficult in the case of ictal fMRI because this is susceptible to motion artifacts. Electroencephalogram (EEG)-triggered fMRI, which is interictal, can be performed without marked movement and is thought to be useful, but requires further investigation in order to establish a methodology. The authors studied EEG-triggered fMRI in partial epileptic patients.

Spikes immediately after electroconvulsive therapy in psychotic patients.

The goal of this study was to assess the spikes systematically and to clarify an epileptc abnormality induced by electroconvulsive therapy (ECT). Our subjects were 20 psychotic patients with no spikes on prior EEGs. ECT was performed by applying electrical current to both sides of the patient's temple every 2 or 3 days for a period of between 1-4 weeks.