Classical Receptive Field was Determined Through Spike Triggered Averaging of Flashed Stimuli
Figure 3. Two examples of classical receptive fields determined by spike triggered (combined for ON and OFF responses) averages of the spatial location of flashed bars. A circle was then fit to the 50% response rate of the Gaussian curve that fit the CRF. The region inside this circle (solid line) represents approximately 75% of the action potentials generated in response to flashed bars. The dashed line represents 3X the CRF. Moves were presented either as 1X, 3X or as an annulus (3X minus 1X).