Table 3.

Specific cell types of Fos-expressing neuronal ensembles in the NAc-Core that were activated in the nicotine-induced acceleration of the escalation of alcohol self-administration

Group	GAD67
Air-Naive	77.7 ± 10.9
Air-Saline	46.29 ± 9.1
Air-Nicotine	49.3 ± 6.8
Vapor-Naive	50.1 ± 20.5
Vapor-Saline	36.1 ± 15
Vapor-Nicotine	71.1 ± 6.9

These data are represented as the mean ± SEM of double-labeled neurons as a percentage of all Fos-labeled neurons. The total percentage does not necessarily add up to 100%, possibly due to incomplete labeling with cell-type markers.