Figure 5.
Ambulatory (top panel), non-ambulatory (middle panel) and vertical (bottom panel) activity measured over the two-hour test period during the sensitization phase after a systemic injection of amphetamine from the groups pre-exposed to the vehicle (VEH, n=14), D-Tyr[11]Neurotensin (NT, n=16), CPP (40 or 120 pmol) with NT (CPP40+NT, n=5; CPP120+NT, n=8) and CPP alone (CPP40, n=8; CPP120, n=7). Each bar represents the group mean ± s.e.m. Symbols indicate a statistically significant difference with VEH (**p < 0.01) or with NT (+p < 0.05; ++p < 0.01).