Clinical Usefullness of Square Wave Jcrkes induced bu Smoth Eye Movement
Project/Area Number |
04671041
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Otorhinolaryngology
|
Research Institution | TOTTORI UNIVERSITY |
Principal Investigator |
IKOMA Hisaaki INSTITUTION, et al : Tottori University, Department of Otolaryngology, Professor, 医学部, 教授 (20032138)
|
Co-Investigator(Kenkyū-buntansha) |
NAKASHIMA Mikio Tottori University, Department of Otolaryngology, Assistant, 医学部, 助手 (10207772)
|
Project Period (FY) |
1992 – 1993
|
Project Status |
Completed (Fiscal Year 1993)
|
Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥1,600,000 (Direct Cost: ¥1,600,000)
|
Keywords | Eye Test / Smooth Eye Movement / Square Wave Jerkes / 視標の大きさ / 視標の周波数 / めまい・平衡障害 / 年令変化 |
Research Abstract |
Tje eye tracking test is currently used to assess smooth persuit eye movements quantitatively. The clinical usefulness of the test in establishing diagnosis was evaluated in 382 paticnts with vertigo and dizziness treated in Tottori University Hospital, and in 30 healthy controls. Smooth persuit eye movements were induced by subject's traking a visual target, and recorded by directcurrent electronystagmograph. The target was moved in the horizontal direction at an ampulitude of 30゚ and at frequency between 0.1 and 0.5 Hz. Parameters to determine the smooth eye movements in differentially diagnosing vertigious symptoms were the waveform of eye movements and the incidence of the square wave jerks. The incidence was affected by age. The incidence of square wave jerks in normal controls was decreased as arget velocity was increased. The incidence was higher in patients with central nervous disorders than controls and vestibular disorders. The incidence at 0.5 Hz stimulation was increased in patients with acoustic tumors and spinocerellar degeneration. The eye traking test was quite useful in differetiating vestidular disorders from acoustic tumor and spinocerebellar degeneration
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Report
(3 results)
Research Products
(7 results)