Fig. 6

Autoreceptor variable dynamics after stimulation. The green curve in Panel a is the dashed green eHA curve from Fig. 5. After eHA goes up dramatically, the number of bound autoreceptors (the red curve) goes up. Following that, the activated G-protein, G ^∗ rises (the blue curve in Panel b), followed by a slow rise in the RGS protein (the magenta curve), T ^∗, that causes G ^∗ to decrease. Note that the autoreceptor variables stay above baseline even after eHA has returned to baseline at approximately 20 s