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The purpose of this study was to define the location and behavior of cerebral structures within the normal human brain that participate in the generation of voluntary saccadic eye movements. Changes in regional cerebral blood flow (rCBF) during task performance were assumed to reflect like changes in regional neuronal activity induced by the task. The(More)
Clinically evident retinal vascular disease in patients with diabetes mellitus may be preceded by an increase in visual evoked potential latency in electrophysiologic testing. This increase may indicate either retinal or optic nerve dysfunction. To determine the origin of the latency increase we initiated a cross-sectional study of simultaneous(More)
Visual acuity, color vision, pupillary reaction, induced Pulfrich phenomenon, kinetic fields, static fields, afterimage testing, and ophthalmoscopic evaluation were studied in nine patients with a history of retrobulbar neuritis. The most consistently reliable test for determining the presence of an old optic nerve defect in these patients was meridional 0(More)
Fourteen patients, 12 of whom were women, with an age range from 26 to 56 years, presented with progressive or recurrent optic neuropathy, despite conventional doses of corticosteroid, and laboratory evidence of collagen vascular disease. The visual loss was severe and most had an acuity less than 20/200. Megadose corticosteroid therapy improved the vision(More)
The charts of 84 patients admitted to the Neurosurgery Service of the Washington University Medical Center between January, 1960, and July, 1981, with aneurysms at or near the junction of the internal carotid and posterior communicating arteries (ICA-PoCA) were reviewed. Special emphasis was placed on the pupillary size and reactivity of 51 patients with(More)
We describe three sisters with Joubert syndrome, two of whom are monozygotic twins with highly discordant phenotypes. The twins were born at 34 weeks' gestation with discordant birthweights. Their anatomic, neurologic, and developmental status differs greatly: Twin B is able to walk, run, and is verbal, unlike Twin A who is wheelchair-bound, severely(More)
A 25-year-old white man presented with gradual right-sided visual loss over a 3-week period resulting in a visual acuity of "no light perception" in the affected eye for 5 days prior to presentation. Visual-evoked potential testing showed no response to light with the right eye and normal response with the left eye. Evaluation revealed an anterior(More)
We treated two patients with partial oculomotor paresis who had pupillary mydriasis, marked inferior rectus muscle weakness, and medial rectus muscle paresis, which were attributed to an ipsilateral fascicular lesion, demonstrated on neuroimaging studies. These cases support the fascicular proximity of inferior rectus muscle and pupillary fibers and suggest(More)
Thirty normal subjects were tested with the Titmus stereotest varying the binocular Snellen's visual acuity from 20/20 to 20/200. From the 36 possible combinations, a nomogram describing the relationship of binocular variations of Snellen's visual acuity and stereoacuity was constructed. The nomogram provides a useful reference for comparing expected and(More)