Responses of Tectal Neurons to Contrasting Stimuli: An Electrophysiological Study in the Barn Owl
Figure 1
The process of positioning the center stimulus and background elements in the visual display.
A) The neural response of a single recording site in the OT to a vertical bar as a function of the horizontal position of the bar. The red curve is the Gaussian fit to the data points. B) The neural response of the same recording site to the vertical position of the bar. Format as in A. C) Graph showing a typical display on the screen. The x-axis is the horizontal position (in degrees) and the y-axis is the vertical position (in degrees) relative to the visual axis. The red ellipse designates the visual receptive field of the site shown in A and B. The center bar (inside the RF) is shown together with the background bars.