Journal
VISION RESEARCH
Volume 62, Issue -, Pages 192-200Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2012.03.008
Keywords
Texture; Second-order; Surround suppression; Spatial vision
Categories
Funding
- NIH [EY16165]
Ask authors/readers for more resources
First-order (contrast) surround suppression has been well characterized both psychophysically and physiologically, but relatively little is known as to whether the perception of second-order visual stimuli exhibits analogous center-surround interactions. Second-order surround suppression was characterized by requiring subjects to detect second-order modulation in stimuli presented alone or embedded in a surround. Both contrast- (CM) and orientation-modulated (OM) stimuli were used. For most subjects and both OM and CM stimuli, second-order surrounds caused thresholds to be higher, indicative of second-order suppression. For CM stimuli, suppression was orientation-specific, i.e., higher thresholds for parallel than for orthogonal surrounds. However, the evidence for orientation specificity of suppression for OM stimuli was weaker. These results suggest that normalization, leading to surround suppression, operates at multiple stages in cortical processing. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available