Table 1. Catecholamine Tissue Content Analysis (μ g/g) in the Nucleus Accumbens and Ventral Bed Nucleus of the Stria Terminalis of Control (Saline/Naloxone) and Morphine-Dependent (Morphine/Naloxone) Rats by HPLC.

	DA NAc (μg/g)	NE vBNST (μg/g)	DA vBNST (μg/g)
Sprague-Dawley
Saline/naloxone (n=8)	4.85±0.75	3.23±0.72	0.71±0.17
Morphine/naloxone (n=9)	5.21±0.91	1.97±0.49	1.32±0.22
Lewis
Saline/naloxone (n=5)	2.37±0.46*	3.12±0.65	1.23±0.37
Morphine/naloxone (n=5)	7.25±1.31*	4.36±0.70	2.69±1.02

*P<0.05.