Non-trivial transforms in C will be expected to modify this result, but will not be considered here. We will appeal to this same argument here. The inhibitory interneurons have been included so as to be able to implement Dale's Law properly. The effect of NRT activity on the IN cells will therefore be that of disinhibition, which is a mode of action used in numerous parts of the brain. Its net effect, for suitable parameter ranges of cell thresholds is similar to that of excitation of NRT activity directly on the thalamic relay cells, as observed experimentally for example by Steriade et al.
Instability arises for values of for which .
This is the interval in Figure 4 . The dependence of the winning activity on the maximum of the wave-length number being singled out by the competition on NRT will be discussed further in the Simulations section. There is finally the non-trivial dependence on the inputs of the inhomogeneous mode winning the competition on the NRT sheet. We will turn to answer this question by simulation in the Simulations section.