(a) Mixed trials
(b) Difficult trials
(c) Antagonism by XLi-093
(d) Reversal of scopolamine deficit
Figure 11: Cognitive-enhancing effects of PWZ-029 in the rhesus monkey Object Retrieval with Detours (ORD) task ( monkeys). (a) Effects of PWZ-029 on ORD tests consist of both easy and difficult trials: (b) PWZ-029 enhanced performance on the ORD task when tested with difficult trials only; (c) enhancement of ORD performance by 0.018 mg/kg of PWZ-029 was attenuated by the α5 -preferring antagonist XLi-093 and this antagonism was surmountable by increasing the PWZ-029 dose; (d) PWZ-029 reversed performance impaired by 0.01 mg/kg of scopolamine [26]. versus vehicle, versus Scopolamine.