Figure 9.

CeA ChR2 laser fails to support self-stimulation. A, In an active spout-touch self-stimulation test, rats failed to touch the spout delivering CeA ChR2 stimulation (25 Hz, 8–10 mW, 1 and 8 s durations, n = 6 and n = 3, respectively) any more than the other control spout that delivered nothing. B, In a passive location-based self-stimulation test, rats neither preferred nor avoided the corner location where CeA ChR2 stimulation was delivered compared with other three corners that lacked laser. In other words, rats simply ignored the laser location (blue laser, 25 Hz, 8–10 mW, 1 and 8 s durations) (n = 4 and n = 3, respectively). Data are shown as mean ± SEM.