Figure 5. A model of multi-whisker supra-linear integration in barrel cortex layer 2/3.
(a) Radial distribution of mean dF/F response to the PW (green) and to the sum of the two closest adjacent whiskers (black). ***Mann-Whitney P=8.1 × 10−4 for PW and *P=0.024 for adjacent whiskers. (b) A simple model of the projections to the barrel and septal compartments. A supra-linear integration of VPm-head and VPm-core inputs during correlated stimulation may occur in neurons above the barrel-septa border that receive both inputs, while neurons above barrel centre and septum centre mainly receive a single source of input and are therefore not subjected to the same mechanism. Bar., barrel.