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II. Quantitative Analysis of Smooth Pursuit in a Hemispherectomy Patient

B. Todd Troost, MD; Robert B. Daroff, MD; Ronald B. Weber, MD; Louis F. Dell'Osso, PhD

Arch Neurol. 1972;27(5):449-452.

Abstract
The quantitative analysis of the smooth pursuit eye movements in a patient who had a left hemispherectomy 11 years previously showed that although the remaining right hemisphere could generate normal pursuit to the right, leftward pursuit was always slower than the target velocity and required corrective saccades. The number of saccades was greatest at lower target speeds and decreased at higher target speeds but the average amplitude of saccades increased monotonically with target velocity. The proportion of the pursuit attempt accomplished by saccades was always about 80%, and the velocity gain of the pursuit system was 0.24 to 0.34.

Author Affiliations
Miami, Fla

From the Ocular Motor Neurophysiology Laboratory, Neurology Service, Miami Veterans Administration Hospital, and the departments of neurology and biomedical engineering, University of Miami (Fla) School of Medicine. Dr. Weber is now with the George Washington School of Medicine.

Footnotes
Accepted for publication June 16, 1972.

Reprint requests to Neurology Service, VA Hospital, 1201 NW 16th St, Miami, Fla 33125 (Dr. Daroff).

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