Figure 7. Effects of subthreshold adaptation on the neuronal transfer function.

A, gain curves with (black, a= 0.3 nA) and without (grey, a= 0 nA) the subthreshold adaptation current for a high activation time constant (τ_w= 500 ms). B, tuning index as a function of the bias current I_bias and the subthreshold adaptation gain a for high activation time constant. C, firing rate as a function of the bias current I_bias and the subthreshold adaptation gain a for high activation time constant. D, gain curves with (black, a= 0.3 nA) and without (grey, a= 0 nA) the subthreshold adaptation current for a low activation time constant (τ_w= 10 ms). E, tuning index as a function of the bias current I_bias and the subthreshold adaptation gain a for low activation time constant. F, firing rate as a function of the bias current I_bias and the subthreshold adaptation gain a for low activation time constant. Other parameters values were the same as those used for Fig. 4D.