Figure 4.

IPA impairs learning up to 24 h after exposure. Learning performances, as indicated by percentages of conditioned PER to the conditioned odor on the third trial (PER conditioning), after a delay between exposure (either to IPA at the 24% concentration or to mineral oil) and olfactory conditioning that varied for each group. Compared with controls (Oil), learning was impaired for delays up to 24 h. By contrast, for delays longer than 24 h, no significant impairment of learning was found. *p < 0.05 (as compared with respective Oil control groups).