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The Oblique Effects of Pattern and Flicker Sensitivity: Implications for Mixed Physiological Input

The inferior contrast sensitivity for oblique gratings has been previously demonstrated at high spatial frequencies with an absolute criterion. In this study contrast sensitivity at oblique and main axis orientations was obtained under separate pattern and flicker threshold criteria across a range o...

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Published in:Perception (London) 1982-01, Vol.11 (4), p.441-455
Main Authors: Essock, Edward A, Lehmkuhle, Stephen
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Language:English
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cited_by cdi_FETCH-LOGICAL-c333t-e1bd61a0dc302e4b61b472c08850f4220e06a9582308902faba10b2485b7d1993
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description The inferior contrast sensitivity for oblique gratings has been previously demonstrated at high spatial frequencies with an absolute criterion. In this study contrast sensitivity at oblique and main axis orientations was obtained under separate pattern and flicker threshold criteria across a range of both spatial and temporal frequencies. The anisotropy of contrast sensitivity was not observed at low spatial frequencies under any stimulus or criterion conditions. At high spatial frequencies the anisotropy was observed for both pattern and flicker thresholds, although the flicker anisotropy was less pronounced. If, as previously suggested, this anisotropy is mediated by X cells, then these psychophysical findings suggest a mixed model in which both pattern and flicker systems receive input from both X and Y-cell pathways.
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subjects Adult
Humans
Models, Biological
Pattern Recognition, Visual - physiology
Retina - physiology
Sensory Thresholds
Space life sciences
Visual Cortex - physiology
Visual Pathways - physiology
Visual Perception - physiology
title The Oblique Effects of Pattern and Flicker Sensitivity: Implications for Mixed Physiological Input
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