Simulated MBON-α3 plasticity after extinction training (three bouts of unpaired CS + and CS − presentations). Plots show CS + versus CS − spiking biases over 3 h after three associative conditioning bouts. The top six rows show results for extinction sessions (black squares) occurring at different times after the last conditioning bout, and the bottom row shows results for no extinction. Conditioning used innately attractive odours (left; valences matched to ACV and 1% ethyl acetate) or repulsive ones (right; valences matched to 1% OCT and 0.3% BEN). With attractive odours, extinction training has the greatest effect when it occurs a long time after conditioning. With aversive odours, extinction training is less dependent on timing.
