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To clarify the exact anatomic relationship of electrically identified hand areas to the central sulcus, we constructed cortical surface renderings of magnetic resonance images (MRI) to locate the central sulcus accurately and measured the distances of stimulated points from the central sulcus and the Sylvian fissure. We obtained hand responses in 33(More)
Corpus callosotomy is a well established procedure for the treatment of intractable epilepsy. However, this is the first clinical report of surgical division of the corpus callosum in Japan. Four patients with refractory seizures suffering from Lennox-Gastaut syndrome underwent anterior partial corpus callosotomy. Their seizures consisted of absences,(More)
A 57-year-old male with primary intracranial malignant melanoma who survived 9 years and 6 months is reported. He underwent surgical removal of the tumour three times during the decade 1978 to 1988, and received chemo-immuno-radiotherapy during that time. Acute tumour growth, suggesting tumour dissemination, was seen in the CT scans after the third removal(More)
1 Introduction Selecting the surgical candidate for medically intractable epilepsy, detection and localization of seizure focus and cerebral functions are essential for diagnosis, for localization of surgical treatment and for prevention of surgical complications. Due to the limitations of noninvasive evaluations, invasive examinations, such as chronic ECoG(More)
Recently, we can acquire immence amount of information thanks to the spread of a computer and inter-net. Therefore, technology for finding the information that a user desires becomes more and more important. A question answering (QA) system answers a question written by natural language in contrast to conventional information retrieval systems where a user(More)
The concentrations of purine catabolites in the cerebral interstitial fluid during progression of and recovery from ischemia were studied using brain microdialysis and high-performance liquid chromatography. Sealed 0.5-mm hollow dialysis fibers were stereotactically implanted into either the cerebral cortex or hippocampus of ketamine anesthetized gerbils(More)
The efficacy and possible side effects of thromboxane A2 (TXA2) synthetase inhibitor in the treatment of cerebral vasospasm after subarachnoid hemorrhage (SAH) were assessed for 24 patients who presented with grades I to IV of the Hunt and Hess classification. All patients underwent aneurysmal clipping within 48 hours after SAH. Postoperatively, TXA2(More)
We have developed a translucence stereoscopy method for displaying the distribution of multiple interictal epileptiform discharges within the intracranial space. The epileptiform discharges, measured using a whole-head magnetoencephalography system, were modeled by a least-squares method to obtain the equivalent current dipoles. The dipoles were located in(More)
Although osteoma of the paranasal sinus is comparatively common, involvement of the sphenoidal sinus region is extremely rare. Lame reported that a total of twelve cases had been described in the European literature since 1800. Mikaelin, Kulczynski and Dolan, since then, described three cases. This paper deals with two surgical cases of sphenoidal sinus(More)
1 Introduction Equivalent current dipole (ECD) analysis for mag-netoencephalogram (MEG) has been useful in screening the localization of the epileptogenic zone, even though MEG was recorded in the interictal period [1] [2]. However, it requires several mathematical restrictions and often fails to estimate confidential current sources. Therefore the(More)