Fig. 5.

Size tuning functions of a divisive normalization model (DNM) complex cell with standard parameters (A), 3 V1 complex cells (B) (replotted from Schwabe et al. 2010, Fig. 2, anesthetized macaque; error bars =  ±SE), and the stimulus and suppressive drive terms of the DNM equation (C). The measured RF diameter of the DNM neuron is 0.81° (indicated by arrowhead in A). All stimuli were gratings with maximal contrast (c = 1) and orientation and frequency that matched the preferences of the respective neuron. (See phenomenon 1 in Table 1.)