For 4 Sustained (blue), and 2 Transient (red), the post-synaptic currents generated within layer 6 were calculated from thalamic spikes with preceding intervals of 5-20ms, 20-250ms, 250-500ms or 500-3000ms. Amplitude values were normalized against the values generated by spikes with the longest (500-3000). As is seen in layer 4, following short preceding intervals the postsynaptic responses in layer 6 are more strongly reduced in Sustained neurons than in Transient neurons.