Congenital Pendular Seesaw Nystagmus

J Korean Neurol Assoc > Volume 23(4); 2005 > Article

Journal of the Korean Neurological Association 2005;23(4): 547-550.

선천성 시계추 시소안진

조현지, 최경규 최광동a 김민정a 박성호a 김지수a

이화여자대학교 의과대학 신경과학교실, 서울대학교 의과대학 신경과학교실a

Congenital Pendular Seesaw Nystagmus

Hyun Ji Cho

Department of Neurology, Ewha womans University College of Medicine, Seoul; Department of Neurology, Seoul National University College of Medicinea, Seoul, Korea

Abstract

Seesaw nystagmus refers to torsional nystagmus with dissociated vertical components. In this disorder, one eye goes up and intorts while the other one descends and extorts. We describe a 40-year-old man who presented with decreased vision due to pendular seesaw nystagmus. Brain MRI showed the empty sella and enlarged pituitary fossa. The delayed and decreased responses of the visual evoked potentials in the ipsilateral occipital lobe with monocular stimulation suggested unequal crossing of the optic pathways as an underlying mechanism. KeyWords:Seesaw nystagmus, Visual evoked potential

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