Rambold H, Helmchen C, Straube A, Büttner U
Department of Neurology, Klinikum Grosshadern, University of Munich, Germany.
Neurology. 1998 Sep;51(3):831-7. doi: 10.1212/wnl.51.3.831.
To assess the diagnostic value of eye-head coupling in seesaw nystagmus (SSN).
SSN is a rare binocular disorder characterized by alternating skew deviation and conjugate ocular torsion.
We examined a patient with a congenital nystagmus that switched to a pendular SSN on near viewing and was associated with involuntary torsional head oscillations.
The binocular torsional eye movements were in phase with the clinically visible head oscillations (i.e., head movements were not compensatory for the torsional eye movements).
This finding suggests that torsional eye-head coupling in pendular SSN has a common pathologic origin. We suggest that alternating vertical disparity of both eyes in pendular SSN is compatible with an oscillating signal acting on an intact vestibular system. The absence of brainstem lesions on high-resolution MRI supports this assumption.
评估眼头耦合在跷跷板眼球震颤（SSN）中的诊断价值。
SSN是一种罕见的双眼疾病，其特征为交替性斜视和共轭性眼球扭转。
我们检查了一名先天性眼球震颤患者，该患者在近视力时转变为钟摆型SSN，并伴有不自主的扭转性头部摆动。
双眼扭转性眼球运动与临床上可见的头部摆动同步（即头部运动并非对扭转性眼球运动的代偿）。
这一发现表明钟摆型SSN中的扭转性眼头耦合具有共同的病理起源。我们认为，钟摆型SSN中双眼交替性垂直视差与作用于完整前庭系统的振荡信号相符。高分辨率MRI未发现脑干病变支持这一假设。
