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. Author manuscript; available in PMC: 2009 Jan 10.
Published in final edited form as: Neuron. 2008 Jan 10;57(1):135–146. doi: 10.1016/j.neuron.2007.11.019

Figure 2.

Figure 2

Estimating the contribution of linear suppression to area summation tuning curves. A1, B1, C1, D1. Spatial frequency tuning curves from 4 representative neurons fitted to a frequency-domain difference of Gaussians (DOGf) equation (lines). A2, B2, C2, D2. DOG receptive field profiles of the 4 representative neurons (dark lines) along with the luminance profiles of the sine-wave gratings used in the area summation experiments (dashed gray lines). A3, B3, C3, D3. Estimated area summation tuning curves based on the classical receptive fields of the 4 representative neurons (dark lines) along with their measured tuning curves (gray lines).