Skip to main content
. 2021 Aug 30;15:740992. doi: 10.3389/fnbeh.2021.740992

Figure 4.

Figure 4

Sensory preconditioning under conditions of dopamine receptor antagonism when trained in an appetitive context. Panel (A) shows the average per cent time spent freezing in response to S2 (stimulus—baseline) on the test of sensory preconditioning. Freezing was significantly higher in vehicle-treated rats (VEH; n = 11) compared to either SCH39166- (SCH; n = 12) or eticlopride-treated rats (ETI; n = 12). Panel (B) shows the average per cent time spent freezing to S1 (stimulus—baseline) on the test of first-order conditioning. Black bars indicate treatment with saline vehicle, white bars indicate treatment with (mid-dose) D1R antagonist SCH39166, and grey hashed bars indicate treatment with (mid-dose) D2R antagonist eticlopride. Error bars represent ±SEM. Significant comparisons are indicated by: * where p < 0.05.