Figure 10. Thalamocortical impulse response for experiment 1.

Impulse response for thalamocortical recurrent model (Eq. 2), i.e., additional response due to sharp ‘-function’-like impulse, ‘-pulse’, of extra thalamic firing superimposed on the steady-state thalamic background activity. The parameter values from fitting to experiment 1 are used (cf. Table 1). The steady-state thalamic firing is set to corresponds to a steady-state layer-4 input ‘current’ , i.e., on the linear flank of the layer-4 activation function (cf. Fig. 4). Solid line corresponds to a linear impulse response, i.e., response to a sufficiently weak -pulse so that only the linear part of the activation is encountered. Dashed line corresponds to a strong -pulse of extra thalamic firing resulting in a maximum value of , i.e., far into the non-linear region of the activation function.