Conraux C, Gentine A, Kopp C, Kalfane K, Eichhorn J L
Hospices Civils de Strasbourg, Centre Hospitalier Régional, France.
Acta Otorhinolaryngol Belg. 1988;42(1):12-22.
The labyrinth is a sensor of vibration. Therefore, multifrequency vestibular stimulation proves indispensable in obtaining a more accurate study of the VOR. We chose to use a pseudo-random binary sequence, generated on a mini computer. The angular velocity instructions are made up of eight repetitive sequences, the spectrum of energy in which is adapted to the frequency range of VOR. A process eliminating the quick phases, the blinking and other artefacts is applied to the nystagmic response, in order to observe only the slow phase velocity. The velocity of eye and chair are compared and the transfer function of VOR is performed. Gain, phase, coherence function and predominance of the mean slow phase velocity between left and right responses are the four indices which define VOR function. The multifrequency rotatory test is interesting for topographic diagnosis, and makes out three diagnostic ranges: a mechanical peripheral, a neurosensory peripheral and a central one. Two practical measures could help the propagation of this method: a simpler vestibular stimulation in order to suppress the rotatory chair, a simplified method of data processing using a personal computer.
内耳迷路是一种振动感受器。因此，多频前庭刺激对于更准确地研究前庭眼反射（VOR）而言必不可少。我们选择使用在小型计算机上生成的伪随机二进制序列。角速度指令由八个重复序列组成，其能量谱与VOR的频率范围相匹配。对眼震反应应用一个消除快相、眨眼及其他伪迹的过程，以便仅观察慢相速度。比较眼睛和座椅的速度，并执行VOR的传递函数。增益、相位、相干函数以及左右反应之间平均慢相速度的优势是定义VOR功能的四个指标。多频旋转试验对于定位诊断很有意义，可区分出三个诊断范围：机械性外周、神经感觉性外周和中枢性。两项实际措施有助于推广该方法：采用更简单的前庭刺激以取代转椅，使用个人计算机简化数据处理方法。
