Perceptual Correlates of Inhibitory and Facilitatory Spatial Interactions in the Visual System.

摘要

The interaction between two scotopic light stimuli has been investigated in the human peripheral retina. The test stimulus, a 20 min arc disc, was surrounded by a ring of variable diameter and steady luminance. The luminance of the disc could be kept constant or sinusoidally modulated in time. Rings of small diameter facilitate the perception of the steady disc, but inhibit the detection of the time varying component of the modulated signal. The opposite occurs with rings of larger diameter. These results are very similar to those obtained from a similar experiment on the ganglion cells of the cat. (Author)