Figure 8.

a, An RF with an inhibitory linear component and an excitatory multiplicative component, in which spectrotemporal extents of the two components are the same. b, At low stimulus powers, the linear component dominates, and the peak is inhibitory. c, d, As the stimulus power is increased, the influence of the multiplicative term begins to dominate; the peak diminishes (c) and becomes strongly excitatory (d). For this example, background firing was simulated by adding a constant to r⃗ (see Materials and Methods); orange represents this baseline response, with black being drops below this rate and white denoting increases in rate.