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Comparative Study
Spectral sensitivity differences between rhesus monkeys and humans: implications for neurophysiology.
- Zachary Lindbloom-Brown, Leah J Tait, and Gregory D Horwitz.
- Department of Physiology and Biophysics and Washington National Primate Research Center, University of Washington, Seattle, Washington.
- J. Neurophysiol. 2014 Dec 15;112(12):3164-72.
AbstractSpectral sensitivity of humans and rhesus monkeys was compared using identical displays and similar procedures. Detection thresholds were measured for the following: 1) 15-Hz modulation of a blue and a green cathode-ray tube phosphor; 2) 15-Hz modulation of all three phosphors together; and 3) slow (<1 Hz) modulations of a blue and a green phosphor under scotopic conditions. Monkeys had lower blue-to-green threshold ratios than humans at all eccentricities tested (0.5 to 7°), consistent with a lower lens optical density in monkeys. In addition to apparently having a lower lens density than humans, monkeys were more sensitive to 15-Hz red-green isoluminant modulations than humans, an effect that cannot be explained by optical factors.Copyright © 2014 the American Physiological Society.
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