Takahashi M, Akiyama I, Tsujita N
Department of Otolaryngology, Keio University School of Medicine, Tokyo, Japan.
Acta Otolaryngol. 1989 Mar-Apr;107(3-4):166-70. doi: 10.3109/00016488909127495.
Gaze functions under high-frequency head oscillations with large amplitudes were investigated in 12 normal subjects. Oscillation amplitude decreased as the frequency increased (31 degrees at 2 Hz to 11 degrees at 5 Hz on average). Maximum head velocity and acceleration were 170-200 degrees/s and 2,500-5,000 degrees/s2, respectively. At frequencies higher than 2 Hz, the mean ratio of eye amplitude to head amplitude reached high large values (1.2 at 2 Hz to 1.8 at 5 Hz, on average), whereas it dropped to extremely low values (0.5-0.6 at 3-5 Hz) in the 2 referred patients with bilateral labyrinthine loss. High ratio values, different from the previous reports, may result from a failure of compensation due to abnormally high-frequency and large head oscillations. The present study indicated that the frequency range of VOR influenced by gaze should correspond to that of daily-experienced oscillations, and that once head oscillations exceed the limit, compensation quickly deteriorates.
对12名正常受试者在高频大幅度头部振荡下的注视功能进行了研究。振荡幅度随频率增加而减小（平均从2赫兹时的31度降至5赫兹时的11度）。最大头部速度和加速度分别为170 - 200度/秒和2500 - 5000度/秒²。在高于2赫兹的频率下，眼动幅度与头部幅度的平均比值达到较高值（平均从2赫兹时的1.2到5赫兹时的1.8），而在2名双侧迷路丧失的患者中，该比值降至极低值（3 - 5赫兹时为0.5 - 0.6）。与先前报告不同的高比值可能是由于异常高频和大幅度头部振荡导致补偿失败所致。本研究表明，受注视影响的前庭眼反射频率范围应与日常经历的振荡频率范围相对应，并且一旦头部振荡超过该限度，补偿功能会迅速恶化。
