TABLE 1

Average raw Newtons (N) response to pulse (120 dB) and no stimulus trials (mean ± S.E.M.) on challenge day (day 0 or 35)

Drug Treatment Repeated-Challenge	120-dB Pulse Day 0	No Stimulus Day 0	120-dB Pulse  Day 35	No Stimulus  Day 35
Saline-saline	0.466 ± 0.090	0.087 ± 0.049	0.549 ± 0.080	0.047 ± 0.005
Ropinirole-saline	0.688 ± 0.148	0.081 ± 0.038	1.018 ± 0.214	0.049 ± 0.003
Saline-PCP	0.854 ± 0.136	0.047 ± 0.005	1.509 ± 0.346^*	0.051 ± 0.005
Ropinirole-PCP	0.672 ± 0.152	0.041 ± 0.004	1.326 ± 0.238^*	0.048 ± 0.006