著者

一條 宏明 朴沢 二郎 藤原 文明 西村 哲也

出版者

Japan Society for Equilibrium Research

雑誌

Equilibrium Research (ISSN:03855716)

巻号頁・発行日

vol.47, no.4, pp.414-419, 1988

被引用文献数

1

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This study was performed to determine the influence of repeated rotatostimulation on the vestibulo-ocular reflex. Three figure skaters and three ballet dancers with careers of more than 10 years were examined by two rotation tests with Contraves' computerized rotary chair on the same day. The two tests were Trapezoid Rotation (TR) test (±2, 4, 6, 8, 10°/sec<SUP>2</SUP>, 10″) and Sinusoidal Harmonic Acceleration (SHA) test (0.01, 0.02, 0.04, 0.08, 0.16 Hz).<BR>1) The TR test showed that skaters and ballet dancers had equivalent values of VOR-Gains as the average of healthy untrained subjects.<BR>2) VOR-Gains measured by the SHA test were lower than the average of healthy untrained subjects.The difference was most clearly noticed with rotations of 0.16Hz.<BR>3) No subjects showed vestibular asymmetry, except for one subject who showed directional preponderance to the left.<BR>4) Nystagmus duration measured by the TR test was within the normal range.

著者

藤原 文明 朴沢 二郎 新川 秀一 一條 宏明 西村 哲也

出版者

Japan Society for Equilibrium Research

雑誌

Equilibrium Research (ISSN:03855716)

巻号頁・発行日

vol.49, no.2, pp.263-270, 1990

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Delayed endolymphatic hydrops (DEH) was proposed by Nadol (1975) and Schuknecht (1976) as a pathological diagnosis. Because of severe hearing loss, the presence of endolymphatic hydrops (EH) cannot be demonstrated by the glycerol test or electro-cochleography. This paper discusses a clinical method of examining EH in this disease. The authors' earlier study, reported in Acta Otolaryngol (Stockh) suppl. 435 (1987), showed that EH in Meniere's disease could be detected not only by audiometry but also by the trapezoid rotation test. The demonstration of ipsilateral labyrinthine preponderance (LPi) by this rotation test is a useful indicator of the development of EH. The authors performed this rotation test in seven patients who satisfied Schuknecht's criteria of DEH by careful history taking and audiometry, and LPi was detected in five of them, especially before the onset of vertigo. It was concluded that the detection of LPi by the trapezoid rotation test should be added to the tests used for the exact diagnosis of DEH.