Figure 6.

The effects of ilPFC inactivation on a CS test and a shock-free probe session. A, Mean ± SEM avoidance responses during three sessions of AA training; animals were exposed to the CS in an alternate environment after the first and third sessions. B, Mean ± SEM CS-evoked freezing during two CS tests; the light gray bar and black arrow indicate that muscimol (n = 8) or vehicle (n = 8) was injected into ilPFC before the second test. C, Mean ± SEM defecation (number of boluses) from the same subjects during two CS tests. D, Mean ± SEM avoidance responses during two sessions of AA training; this was followed by a shock-free probe session before which muscimol (n = 7) or vehicle (n = 7) was injected into ilPFC. E, Mean ± SEM CS-evoked freezing. F, Mean ± SEM avoidance responses during the shock-free probe session. *p < 0.05.