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John B. Selhorst, MD; William F. Hoyt, MD; Moshe Feinsod, MD; Yoshio Hosobuchi, MD

Arch Neurol. 1976;33(3):193-195.

Abstract
• Intermittent corectopia was recently observed in a patient with bilateral, rostral midbrain infarction. Results from neuropathologic examination disclosed isolated but intact Edinger-Westphal nuclei.

An explanation of midbrain corectopia centered on segmental innervation of the pupil by the Edinger-Westphal nucleus. In the presence of a paralyzed dilator muscle, select, central inhibition of sphincter tone resulted in an oval and eccentric pupil.

Author Affiliations
From the Neuro-Ophthalmology Unit, departments of neurological surgery, neurology, and ophthalmology, University of California, San Francisco.

Footnotes
Accepted for publication June 17, 1975.

Reprint requests to Neuro-Ophthalmology Unit, 728 M, University of California, San Francisco, CA 94143 (Dr Hoyt).

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