Hamid M A
Section of Vestibular and Balance Disorders, Cleveland Clinic Foundation, OH 44106-4712.
Otolaryngol Head Neck Surg. 1991 Jul;105(1):40-3. doi: 10.1177/019459989110500106.
Determining side of vestibular lesion remains a challenging task during neurotologic investigations, particularly if auditory lateralizing signs are absent. Traditionally, absent or decreased caloric response has been regarded as evidence of unilateral vestibular deficit. But, the inability of the chair test to detect side of lesion has been generally accepted because rotation stimulates both end organs. A retrospective study postulated and tested a hypothesis that low-frequency asymmetry of sinusoidal harmonic acceleration (SHA) testing can determine side of lesion when phase is abnormal. The present prospective, double-blind study was designed to further test the retrospective study hypothesis. Results showed that SHA asymmetry detects side of unilateral vestibular deficit when phase is abnormal in 97% of cases.
在神经耳科学检查过程中，确定前庭病变的侧别仍然是一项具有挑战性的任务，尤其是在没有听觉定位体征的情况下。传统上，冷热试验反应缺失或减弱被视为单侧前庭功能减退的证据。但是，由于旋转会刺激双侧终器，因此转椅试验无法检测出病变侧别这一点已被普遍接受。一项回顾性研究提出并检验了一个假设，即当相位异常时，正弦谐波加速度（SHA）测试的低频不对称性可以确定病变侧别。本前瞻性、双盲研究旨在进一步检验该回顾性研究的假设。结果表明，当相位异常时，SHA不对称性在97%的病例中可检测出单侧前庭功能缺损的侧别。
