Ryosuke Ogihara

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There are few epidemiological studies on sleep loss and daytime sleepiness in the general adult population of Japan. A total of 4000 adult people, aged 20 and over, were randomly drawn from five areas of Japan, and 3030 individuals were interviewed and completed a questionnaire including information about sleep duration and sleep problems. Overall, 29%(More)
Computed tomography (CT) was used to study cerebral atrophy in 18 patients with clinically diagnosed Alzheimer's disease of presenile type and in 14 healthy age-matched subjects as controls. Using the computerized planimetric method, Subarachnoid Space Volume Index and Ventricle Volume Index were calculated as the measure of cortical atrophy and ventricular(More)
OBJECTIVE This cross-sectional study was conducted to estimate the prevalence of somatic and psychological complaints (SPCs) and to investigate the association of SPCs with insomnia in a sample of the general adult population of Japan. METHODS We randomly selected 4000 adult residents (-20 years old) from five areas of Japan using stratified sampling and(More)
A case of giant intracranial aneurysm which almost completely occluded the internal carotid artery and was diagnosed angiographically by prolonged injection technique was reported. A 62-year-old house-wife was admitted to the Department of Neurosurgery of The Asahi General Hospital, complaining of headache, nausea, and left ptosis. Neurological examination(More)
Intravenous hyperosmotic NaCl infusion is an effective treatment for circulatory shock. However, a fast infusion rate (2 mL/kg at the rate of 1 mL/s) induces transient hypotension. This response has been reported to be due to decreased total peripheral resistance and/or decreased cardiac performance. Although the hypotension is transient and recovers within(More)
To clarify the effects of daily stress, habitual exercise, drinking and smoking on the prevalence of sleep disorders, we selected 4000 residents (> or =20 years) in Japan by stratified random sampling and carried out structured interviews (response rate 75.8%). Frequencies of sleep disorders (difficulty initiating sleep: DIS; difficulty maintaining sleep:(More)
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