Spatial interactions in apparent contrast: inhibitory effects among grating patterns of different spatial frequencies, spatial positions and orientations.
Suppression of the apparent contrast of a small 4 cycle wide suprathreshold sine wave grating patch by a high contrast sine wave grating surround pattern was studied as a function of the spatial frequency, orientation and spatial extent of the surround. The data are consistent with the existence of a complex network of inhibitory interconnections among mechanisms that mediate contrast perception. These connections must extend over spatial distances equivalent to more than 12 cycles of the central grating patch.
Cannon
M W
MW
H.G. Armstrong Aerospace Medical Research Laboratory, Wright-Patterson Air Force Base, OH 45433.
Fullenkamp
S C
SC
D000222:Adaptation, Physiological / Q000502:physiology; D015350:Contrast Sensitivity / Q000502:physiology*; D006801:Humans; D007266:Inhibition, Psychological