Mesopic increment threshold spectral sensitivity of single optic tract fibres in the cat: cone-rod interaction
نویسندگان
چکیده
منابع مشابه
Rod and cone pathway signaling and interaction under mesopic illumination.
This study investigates the time-course and post-receptoral pathway signaling of photoreceptor interactions when the rod (R) and three cone (L, M, S) photoreceptor classes contribute to mesopic vision. A four-primary photostimulator independently controls photoreceptor activity in human observers. The first experiment defines the temporal adaptation response of receptoral (L-, S-cone, rod) and ...
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Mesopic light levels span approximately 3-4 log units in the natural viewing environment, including many indoor lighting settings, and most twilight or nighttime outdoor and traffic lighting environments. Traditional studies of the contribution of the different photoreceptor types to mesopic vision have been hampered by an inability to modulate the rod or cone systems independently. Our approac...
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PURPOSE To obtain and analyze scotopic increment threshold functions to test the hypothesis that rod photoreceptor immaturity accounts for the elevation of infants' over controls' dark-adapted thresholds and elevation of parafoveal over peripheral thresholds in infants. METHODS Using a preferential looking method, thresholds for detection of 2(o), 50 msec, blue stimuli presented 10(o) (parafo...
متن کاملIncrement threshold and detection latency in the rod and cone systems.
It was reported previously that increment-threshold functions obtained in the dark-adapted rod and cone systems have two distinct branches, and that these functions are predicted by a simple model similar to those developed to describe vertebrate reaptor responses. The model also makes several unusual predictions concerning the latency for detection of the increment field at threshold. These pr...
متن کاملLateral suppression of mesopic rod and cone flicker detection.
This study investigated the mechanisms of flicker detection suppression by measuring mesopic rod and cone critical flicker frequencies (CFFs) at different center and surround illuminance levels. Stimuli were generated with a four-primary photostimulator that provided independent control of rod and cone excitations. The results showed that dim surrounds ≤0.2 Td suppressed cone-mediated CFFs at ≥...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1970
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1970.sp009156