머리의 회전 속도와 시선 고정 거리, 머리 회전 방향에 따른 비디오두부충동검사에서의 전정안반사 이득의 변화

송찬일; 김영은; 차은혜; 유명훈; 이제연; 박홍주

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자료유형: 학술저널

저자정보: 송찬일 김영은 차은혜 유명훈 이제연 박홍주

저널정보: 대한이비인후과학회 대한이비인후-두경부외과학회지 대한이비인후과학회지 두경부외과학 제58권 제8호

발행연도: 2015.1

수록면: 547 - 551 (5page)

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Background and Objectives The conventional instrument for video head impulse test (vHIT) records the movement of the right eye only. The aim of this study was to evaluate the changes in the gain of vHIT results qdue to different directions of head rotation directons at different target distances and rotation speeds. Subjects and Method Horizontal head impulse was recorded by vHIT in 20 normal subjects. vestibulo-ocular reflex (VOR) gains to the right and left directions were compared at different test conditions. Two different impulses with low (50-150 deg/sec) and high (200-300 deg/sec) peak-head-velocities were tested and the subjects were also instructed to fixate a laser dot on a screen at different distances of 60, 100, and 200 cm. Eye movements were recorded on the right eye. Results Regardless of the target distances and peak-head-velocities, the VOR gains to the rightward head rotation were significantly greater than those to the leftward head rotation. In more than 85% of normal subjects, vHIT gain to the rightward head rotation was greater than that to the leftward head rotation. Mean gain asymmetries were 2.16-3.33% and the mean interaural vHIT gain differences were 0.04-0.07. Conclusion Regardless of the target distances and peak-head-velocities, the VOR gains to the rightward head rotation were significantly greater than those to the leftward head rotation. Directional asymmetry of VOR gain should be considered when interpreting vHIT results in patients with vestibular disorders.

#Interaural difference #Vestibule-ocular reflex #Video head impulse test

참고문헌 (16)

참고문헌 신청

Barin K / / ICS Impulse vHIT: Interpretation of test results

Bartl K / 2009 / Head impulse testing using video-oculography / Ann N Y Acad Sci 1164 : 331 ~ 333

Blodow A / 2013 / Detection of isolated covert saccades with the video head impulse test in peripheral vestibular disorders / Auris Nasus Larynx 40 (4) : 348 ~ 351

Collins CC / 1981 / Extraocular muscle forces in normal human subjects / Invest Ophthalmol Vis Sci 20 (5) : 652 ~ 664

Halmagyi GM / 2012 / Video head impulse test diagnoses vestibulotoxicity / Otolaryngol Head Neck Surg 147 (2 Suppl) : 95 ~

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