Baloh R W, Yue Q, Jacobson K M, Honrubia V
Department of Neurology, UCLA School of Medicine 90024-1769, USA.
Neurology. 1995 Jul;45(7):1297-301. doi: 10.1212/wnl.45.7.1297.
Positional nystagmus that does not fatigue, persists as long as the position is held, and changes direction in different head positions has typically been attributed to central vestibular lesions. We recently studied three patients who presented with positional nystagmus having these features but almost certainly of benign peripheral origin. All three had an initial history typical of benign positional vertigo and, in two, the persistent direction-changing positional nystagmus occurred after the patient underwent a maneuver to remove debris from the posterior semicircular canal. The positional nystagmus profile and clinical course are consistent with the debris leaving the posterior semicircular canal and becoming attached to the cupula of the horizontal semicircular canal.
不疲劳的位置性眼球震颤，只要保持该位置就会持续存在，并且在不同头位时改变方向，通常归因于中枢性前庭病变。我们最近研究了三名患者，他们表现出具有这些特征的位置性眼球震颤，但几乎可以肯定是良性外周起源。所有三名患者最初都有典型的良性位置性眩晕病史，其中两名患者在接受从后半规管清除碎片的手法操作后出现了持续的方向改变性位置性眼球震颤。位置性眼球震颤特征和临床过程与碎片离开后半规管并附着于水平半规管的壶腹嵴一致。
