Various response types following Δ7 stimulations. A: Δ7 to P-F3N2v, inhibitory. B: Δ7 to P-EN1, excitatory. C: Δ7 to E-PG, mixed responses. (i) to (iv) correspond to 5, 10, 20 and 30 pulses stimulation protocol. Each line is the average response for one fly (four runs per fly).