Fig. 4.

The effect of ${\sigma }_{\mathit{AMPA}}$ on Fano factors of excitatory and inhibitory neurons in the three layers. The parameters were set as the same as those in Fig. 3. a–c The impact of ${\sigma }_{\mathit{AMPA}}$ on the Fano factor of excitatory neurons in layer 1 (a), layer 2 (b) and layer 3 (c). d–f The impact of ${\sigma }_{\mathit{AMPA}}$ on the Fano factor of inhibitory neurons in layer 1 (d), layer 2 (e) and layer 3 (f). The red curves indicate the excitatory neurons and the blue curves represent the inhibitory neurons. Error bars indicate s.e.m