title: Spatial summation in color-receptive pathways.
mesh_terms: D000328:Adult; D003118:Color Perception; D003124:Colorimetry; D004192:Discrimination, Psychological; D006801:Humans; D008029:Lighting; D008297:Male; D009434:Neural Pathways / Q000502:physiology; D012160:Retina / Q000502:physiology*