PMID: 2487639Jan 1, 1989Paper

Human horizontal optokinetic nystagmus elicited by the upper versus the lower visual fields

Visual Neuroscience
C M Murasugi, I P Howard

Abstract

A 30-deg-high horizontally rotating random-dot display was presented to the central field, and with its more central edge at vertical eccentricities of 0, 2.5, 5, and 10 deg above or below the horizon. Stimulus velocities of 25-100 deg/s and two directions of motion were presented. The mean gain of the slow phases of optokinetic nystagmus (OKN) for five subjects was significantly higher when the stimulus was presented to the lower visual field than when the stimulus was presented to the upper field. This difference was most pronounced when the display was displaced 5 deg from the fovea and moving below 100 deg/s. Our results are consistent with existing psychophysical and physiological evidence for the superiority of the upper retina. In addition, four of the five observors showed significant directional asymmetries.

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Citations

Feb 1, 1989·Perception & Psychophysics·C M MurasugiM Ohmi
Nov 28, 2001·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·S Pitzalis, F Di Russo
Mar 13, 2013·Strabismus·Christopher M KnappIrene Gottlob
Mar 24, 2006·Experimental Brain Research·Tatjana Seizova-CajicIan S Curthoys

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