Table 1.

Summary of groups injected (i.p.) with either saline or 3 mg/kg AMPH a total of 10 times (once every other day) during the ages noted. For Experiment 1, rats were sacrificed for slice electrophysiology 3–5 weeks following their last injection. In Experiment 2, rats were sacrificed at about the same age in adulthood such that withdrawal periods were 3–5 weeks and 11–14 weeks for adult and adolescent groups, respectively

	Adolescent		Adult
	P27–P45	P85–P103	P27–P45	P85–P103
Exp. 1
Control	Saline × 10	–	Saline × 10	Saline × 10
Treated	AMPH × 10	–	Saline × 10	AMPH × 10
Exp. 2
Control	Saline × 10	Saline × 10	Saline × 10	Saline × 10
Treated	AMPH × 10	Saline × 10	Saline × 10	AMPH × 10