Figure 6. Socially induced increases in the locomotor activity of adolescent mice.

Saline-treated BALB and B6 test mice exhibited similar increases in locomotor activity after the introduction of a stimulus mouse. Increases in locomotor activity upon social reunion were found for all experimental groups except BALB test mice that received the 5mg/kg morphine sulfate dose. * P<0.005 for comparisons between the minute prior to and after social reunion. All data are presented as the mean ± SEM.