Premium
Visual sensitivity in the squirrel monkey
Author(s) -
Jacobs Gerald H.
Publication year - 1973
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330380235
Subject(s) - saimiri sciureus , squirrel monkey , spectral sensitivity , photopic vision , sensitivity (control systems) , ground squirrel , flicker fusion threshold , flicker , biology , psychology , communication , optics , physics , neuroscience , computer science , retina , computer graphics (images) , wavelength , electronic engineering , engineering
Abstract Several indices of visual sensitivity have been obtained from behavioral experiments conducted on the squirrel monkey ( Saimiri sciureus ). In this species, the photopic spectral sensitivity functions determined by increment‐threshold and flicker discrimination procedures are substantially different; the involvement of two different neural processes in the two tasks is suggested. When tested similarly, the thresholds for rod and cone‐based vision are not substantially different for squirrel monkeys and humans; however, above cone threshold, for a 500 nm test light, increment threshold is some 0.3 to 0.4 log 10 units higher for the squirrel monkey. Rod saturation has also been demonstrated to occur in the squirrel monkey.