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. Author manuscript; available in PMC: 2015 Apr 10.
Published in final edited form as: Behav Pharmacol. 2011 Apr;22(2):147–159. doi: 10.1097/FBP.0b013e328343d7dd

Figure 4. Strain-dependent influence of morphine administration on the locomotor activity of adolescent mice.

Figure 4

No differences in locomotor activity were observed between saline-treated mice from the BALB and B6 strains, and B6 locomotor activity did not change as a function of morphine administration. BALB mice expressed lower levels of locomotor activity after receiving the 1mg/kg dose and elevated levels of locomotor activity after receiving the 5mg/kg dose. * P<0.005 for between-strain comparisons at a specific dose. All data are expressed as the mean ± SEM.