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NEUROLOGY 2004;62:784-787
© 2004 American Academy of Neurology
Brief Communications

Vertical oscillopsia in bilateral superior canal dehiscence syndrome

A. Deutschländer, MD, M. Strupp, MD, K. Jahn, MD, L. Jäger, MD, F. Quiring and T. Brandt, MD, FRCP

From the Department of Neurology (Drs. Deutschländer, Strupp, Jahn, and Brandt, F. Quiring) and Institute of Clinical Radiology (Dr. Jäger), Klinikum Grosshadern, Ludwig-Maximilians University, Munich, Germany.

Address correspondence and reprint requests to Dr. Angela Deutschländer, Department of Neurology, Klinikum Grosshadern, Marchioninistr. 15, 81377 Munich, Germany; e-mail: angela.deutschlaender{at}nro.med.uni-muenchen.de

A patient sought treatment for vertical oscillopsia and impaired vision during locomotion, and unsteadiness of gait. Positive fistula tests and CT of the temporal bones confirmed a diagnosis of bilateral superior canal dehiscence. An impairment of the superior canal vestibulo-ocular reflex, documented by three-dimensional search coil eye movement recordings for oblique (single) and downward pitch head motion (bilateral canal testing), is proposed to induce vertical rather than torsional-vertical oscillopsia during locomotion.

Received June 5, 2003. Accepted in final form December 23, 2003.

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