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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2013 May 7;132(3):562–570. doi: 10.1016/j.drugalcdep.2013.04.003

Figure 2.

Figure 2

Mean (±SEM) total orexin-positive appositions on VTA DA neurons for the PS and PN groups. Numbers represent the average summed total (appositions/neuron) for each animal based on total appositions counted on twenty randomly-selected TH-positive neurons. The PN group exhibited an increased number of orexin and TH appositions in the VTA relative to the PS group. * indicates a significant difference between PS and PN animals, p<0.05.