Fig. 6

Spatial object recognition test. A Illustration of the spatial object recognition test. B The total time spent sniffing objects did not significantly differ among groups. C The time spent sniffing each object during recall did not significantly differ among groups. D The recognition index did not significantly differ among groups (NS: not significant). The recognition index was significantly different from the hypothetical value of 50% in the control group, after mecamylamine injection (MEC), and after early spontaneous withdrawal (SW) from nicotine (crosses). Data represent the mean ± S.E.M. from 6–10 mice/group