[Compensatory vestibular performance and rotation perception].

The pendular test was used to study turning sensations in 31 patients and 24 test persons. A steering wheel was attached to the pendular chair, and persons were asked to turn against chair rotation. Chair movement, steering wheel and horizontal vestibular nystagmus were computer-analysed. The correlation between the cumulogram of slow nystagmus phases and steering wheel rotations was evaluated. The values of the steering wheel and eye movements were calculated. It could be shown that the compensation of the pendular chair by the aid of the steering wheel was symmetric in healthy persons, in spite of the presence of spontaneous nystagmus. In patients with dizziness, no symmetric reaction was recorded.