頭振後眼振と頭部角加速度および温度眼振との比較
1988 年 47 巻 3 号 p. 280-283
詳細
1988 年 47 巻 3 号 p. 280-283
A head-shaking test in generally used to provoke vestibular nystagmus. We tried two types of head-shaking tests. One is head-shaking by the examiner and the other is head-shaking by the patient. The elicited head-shaking nystagmus (HSN) was recorded on an electronystagmograph. At the same time acceleration of the patient's head was recorded by an accelerometer attached to the forehead with a headband and converted into acceleration. We studied 36 patients who had complained of vertigo.
We found the angular acceleration of the patient's head ranged from 3000°/s2 to 11500°/s2, but there was no correlation between the appearance of HSN and the angular acceleration of the patient's head. There was no correlation between the slow phase velocity of HSN and the angular acceleration, either.
Next, we investigated the correlation between canal paresis and the slow phase velocity of HSN. The coefficient of correlation was only 0.53, but there was a tendency that the severer the canal paresis was, the larger was the slow phase velocity of the elicited nystagmus.
