they then received one of the following treatments prior to testing on the next 5 days : saline , nonreinforcement , the da receptor blocker pimozide ( 0.5 or 1.0 mg/kg ) , the d1 receptor blocker sch 23390 ( 0.01 , 0.05 , 0.1 mg/kg ) , and the d2 receptor blocker metoclopramide ( 1.0 , 5.0 , 10.0 mg/kg ) .
C0034798
da
C0058698
d2 receptor