Fig. 5. Learning and memory in control and cocaine-exposed snails. (A) Control (N=31; from Fig. 4C) and (B) 0.1 µmol l^-1 cocaine-treated (N=15). Values are mean ± s.e.m. for number of pneumostome openings. Both groups demonstrated learning and memory. 1, Training session 1; 2, Training session 2; MT, Memory Test; ^*P<0.05 compared with performance during Training session 1 within each treatment group.