Table 1.

Plasma levels of corticosterone at time of killing (2 hr before lights off) in animals subjected to bilateral ADX or SHAM surgery

Group	Corticosterone (μg/dl)	n
Naive	5.53  ± 0.98	4
UNOP	5.94  ± 0.13	3
SHAM, 1 d	4.40  ± 0.95	3
SHAM, 3 d	4.35  ± 0.43	3
SHAM, 7 d	5.86  ± 1.79	3
SHAM, 14 d	5.95  ± 0.78	3
ADX, all groups	ND	4/group

Animals were killed 1, 3, 7, or 14 d after surgery. In addition, naive animals that had not experienced any experimental manipulation and UNOP animals, which did not undergo surgery, but were given saline–dextrose solution to drink, were included. Data are expressed as mean ± SEM. Levels of plasma corticosterone were not detectable (ND) in any of the ADX animals.