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. Author manuscript; available in PMC: 2009 Sep 1.
Published in final edited form as: Neurotoxicol Teratol. 2008 Mar 21;30(5):448–454. doi: 10.1016/j.ntt.2008.03.063

Fig. 1.

Fig. 1

Total activity of in utero drug exposed neonatal guinea pigs. Activity is the total count of photo-beam breaks recorded in a 15 minute period. Methadone (striped bars) or morphine (gray bars) exposed pups showed signs of withdrawal related hyperactivity on day 3; by day 7 and 14 counts were not different from control (black bars). Values are average of 6 pups per treatment. Vertical bars represent standard error (S.E). ** p<0.01, *** p<0.001 vs. vehicle; ^ p<0.05 vs. morphine; a p<0.05 vs. 7-day same treatment; b p<0.05 vs. 14-day same treatment.