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Results of Quantitative Vestibulo-ocular Testing

Robert W. Baloh, MD; Horst R. Konrad, MD; Donald Dirks, MD; Vicente Honrubia, MD

Arch Neurol. 1976;33(7):507-512.

Abstract
• A new quantitative vestibulo-ocular test battery was evaluated in 12 patients with surgically confirmed cerebellarpontine angle tumors. The battery consisted of precise vestibular and visual stimuli and digital computer analyses of responses. Eleven of 12 patients, including all patients with acoustic neurolemmomas, had significant vestibular deficits on the tumor side (P <.01). Contrary to previous reports, rotatory tests (impulse and sinusoidal acceleration) reliably identified the side and magnitude of vestibular deficit. Eight of nine patients with surgically confirmed brain stem compression had significantly impaired smooth pursuit (P <.05). Optokinetic nystagmus was impaired in five of nine patients with brain stem compression (P <.05). By combining the results of the entire test battery with standard clinical evaluation, a good prediction of tumor size, location, and type was possible.

Author Affiliations
From the departments of neurology (Dr Baloh) and surgery (Drs Konrad, Dirks, and Honrubia), Human Vestibular Project, University of California, Los Angeles.

Footnotes
Accepted for publication Dec 17, 1975.

Reprint requests to Department of Neurology, Reed Neurological Research Center, Center for the Health Sciences, Westwood Plaza, UCLA, Los Angeles, CA 90024 (Dr Baloh).

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ABSTRACT