Halmagyi G M, Curthoys I S
Department of Neurology, Royal Prince Alfred Hospital, Camperdown, Sydney, New South Wales, Australia.
Arch Neurol. 1988 Jul;45(7):737-9. doi: 10.1001/archneur.1988.00520310043015.
Unilateral loss of horizontal semicircular canal function, termed canal paresis, is an important finding in dizzy patients. To our knowledge, apart from head-shaking nystagmus, no clinical sign of canal paresis has yet been described and the term derives from the characteristic finding on caloric tests: little or no nystagmus evoked by either hot or cold irrigation of the affected ear. We describe a simple and reliable clinical sign of total unilateral loss of horizontal semicircular canal function: one large or several small oppositely directed, compensatory, refixation saccades elicited by rapid horizontal head rotation toward the lesioned side. Using magnetic search coils to measure head and eye movement, we have validated this sign in 12 patients who had undergone unilateral vestibular neurectomy.
单侧水平半规管功能丧失，即半规管轻瘫，是眩晕患者的一项重要体征。据我们所知，除摇头性眼球震颤外，尚未有半规管轻瘫的临床体征被描述，该术语源于冷热试验的特征性表现：患耳经冷或热灌注后诱发的眼球震颤微弱或无眼球震颤。我们描述了一种简单可靠的单侧水平半规管功能完全丧失的临床体征：快速向患侧水平转头时引发一个大的或几个小的方向相反的、代偿性的、重新注视性扫视。我们使用磁搜索线圈测量头部和眼睛运动，在12例接受单侧前庭神经切除术的患者中验证了这一体征。
