Hiroshi Otsubo24
Ayako Ochi21
Katsuhiro Kobayashi19
O Carter Snead16
Harumi Yoshinaga15
24Hiroshi Otsubo
21Ayako Ochi
19Katsuhiro Kobayashi
16O Carter Snead
15Harumi Yoshinaga
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OBJECTIVE During seizures, intracranial EEG electrodes can record ictal muscle movements. Our purpose was to differentiate the high-frequency oscillations (HFOs) of extracranial muscle contractions from those of intracranial epileptogenic discharges. METHODS Using intracranial video-EEG (IVEEG), we recorded seizures in a 17-year-old boy with left(More)
BACKGROUND Evidence regarding the association between alcohol consumption and the gastro-esophageal reflux disease (GERD) spectrum has been conflicting. We examined the association between alcohol consumption and erosive esophagitis and Barrett's epithelium in Japanese men. METHODS The study population comprised 463 men subjects who had undergone an upper(More)
OBJECT Magnetoencephalography (MEG) has been typically used to localize epileptic activity by modeling interictal activity as equivalent current dipoles (ECDs). Synthetic aperture magnetometry (SAM) is a recently developed adaptive spatial filtering algorithm for MEG that provides some advantages over the ECD approach. The SAM-kurtosis algorithm (also known(More)
  • Ayako Ochi, Hiroshi Otsubo, Elizabeth J Donner, Irene Elliott, Ryoichi Iwata, Takanori Funaki +5 others
  • 2007
PURPOSE To characterize the spatial and temporal course of ictal high-frequency oscillations (HFOs) recorded by subdural EEG in children with intractable neocortical epilepsy. METHODS We retrospectively studied nine children (four girls, five boys; 4-17 yr) who presented with intractable extrahippocampal localization-related epilepsy and who underwent(More)
OBJECTIVES We propose a combination of independent component analysis (ICA) and recursively applied and projected multiple signal classification (RAP-MUSIC) as a new approach to dipole source estimation of epileptiform discharges. The method is minimally dependent on subjective decisions. METHODS Ten electroencephalographic (EEG) data matrices were(More)
OBJECTIVES We tried to estimate epileptic sources by a combination of independent component analysis (ICA) and recursively applied and projected multiple signal classification (RAP-MUSIC) in real epileptiform EEG discharges. METHODS EEG data including an array of spikes from 3 patients were decomposed by ICA, and source estimation was performed by(More)
It still remains controversial whether simple obesity, as measured by the body mass index (BMI), is an independent risk factor for Barrett's esophagus (BE). Recent studies have shown abdominal obesity, as defined by the waist circumference (WC) and the waist-to-hip ratio (WHR), to be a risk factor for BE, independent of the BMI, with the association between(More)
PURPOSE High-frequency oscillations (HFOs), termed ripples at 80-200 Hz and fast ripples (FRs) at >200/250 Hz, recorded by intracranial electroencephalography (EEG), may be a valuable surrogate marker for the localization of the epileptogenic zone. We evaluated the relationship of the resection of focal brain regions containing high-rate interictal HFOs and(More)
OBJECTIVE To localize high-frequency oscillations (HFOs) on the cortex during epileptic spasms using video subdural EEG and Multiple Band Frequency Analysis (MBFA). METHODS Using video subdural EEG sampled at 1 kHz, we studied a 14-year-old boy with asymmetric epileptic spasms of possible left frontal origin. We identified HFOs, then analyzed and(More)
PURPOSE Very fast activity was investigated on the ictal EEGs of epileptic spasms to elucidate the pathophysiology of West syndrome (WS) and related disorders from a novel point of view. METHODS The traces of scalp ictal EEG of spasms temporally were expanded in 11 patients whose clinical diagnosis was symptomatic WS in six, cryptogenic WS in two, Aicardi(More)