先天性眼振の眼球運動検査所見の検討
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概要
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Thirty five patients with congenital horizontal nystagmus (except nystagmus alternans and latent nystagmus) were examined electronystagmographically.<BR>All patients underwent the following tests of eye movements:gaze test, optokinetic pattern test (OKP), eye tracking test (ETT) and pendular rotation test (PRT) while gazing at a stationary target point.<BR>If the nystagmus had the element of saccade at least in the uni-directional gaze test, we defined it as "jerky type", and when the nystagmus had no saccade in the bilateral gaze test, we defined it as "pendular type".<BR>1. Five patients had pendular type and 30 patients had jerky type nystagmus.<BR>2. One patient who showed no response in the OKP test had pendular type nystagmus and another with inversion of OKP clearly had jerky type.<BR>3. We considered that lateral gaze nystagmus and inversion or no response in the OKP test are related to the direction of eye movement.<BR>4. Disorders of smooth pursuit in ETT were much better compensated in PR T while gazing at a stationary target point in patients with jerky type than in those with pendular type congenital nystagmus.<BR>5. Rehabilitation is considered to be of value for patients with congenital nys-tagmus, especialy of the jerky type.
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