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Spectral sensitivity differences between rhesus monkeys and humans: implications for neurophysiology.

ABSTRACT: Spectral 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.

SUBMITTER: Lindbloom-Brown Z 

PROVIDER: S-EPMC4269716 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature

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Spectral sensitivity differences between rhesus monkeys and humans: implications for neurophysiology.

Lindbloom-Brown Zachary Z   Tait Leah J LJ   Horwitz Gregory D GD  

Journal of neurophysiology 20140924 12

Spectral 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 l  ...[more]