Figure 3.
Spontaneous object recognition performance from Experiment 2 on trials in which rats received either saline or scopolamine infusions bilaterally into PRh 15 min before the proactive interference phase. The retention delay was 3 h. Recognition memory was significantly impaired on trials in which rats received saline infusions before pre-sample object exposure (object condition). Conversely, scopolamine infusions prevented this memory impairment, maintaining performance at the level observed in the no-object proactive interference phase condition. Data are presented as average discrimination ratio ± SEM. (*) P < 0.05, saline versus scopolamine.