Widely different combinations of parameter values give rise to feature invariant responses in our model.

<p>Five example model neurons and their responses to the different chirp stimuli. The FI values for models 1 to 5 were 0.90, 0.79, 0.91, 0.77, and 0.89, respectively. Parameter values for models 1 to 5 where <i>σ</i>_<i>B</i> = 0.42, 0.41, 0.35, 0.40, 0.42; <i>I</i>_<i>bias</i> = -9.4, -6.6, -18.1, -5.2, -6.5 nA; <i>g</i>_<i>syn</i> = 0.10, 0.13, 0.16, 0.10, 0.09 μS; <i>g</i>_<i>h</i> = 0.24, 0, 0.48, 0.02, 0 μS; <i>g</i>_<i>T</i> = 2.10, 0, 3.99, 0, 5.6 μS. Other parameter values were the same as that indicated in the methods.