Fig. 8. Comparison of normalized performance between control and cocaine-exposed snails. Performance of control animals and animals treated with 0.1 µmol l^-1 cocaine. Data are reported as mean ± s.e.m. of pneumostome openings measured on the Test for Savings (TS) as a percent of openings on Training session 1 (A) and the last extinction day (B). Animals treated with 0.1 µmol l^-1 cocaine showed a significant reduction in extinction memory during reinstatement compared with control snails. 2, Training session 2; MT, Memory Test. ^*P<0.05, compared with controls on the same day.