Table 1.

The number and baseline firing rates of neurons recorded during spontaneous activity (experiment 1)

Treatment	Session	mPFC		OFC
		n	Baseline (Hz)	n	Baseline (Hz)
Amphetamine, 2 mg/kg	Day 1	188	3.35 ± 0.32	344	2.86 ± 0.26
Amphetamine, 2 mg/kg	Day 2	179	3.42 ± 0.34	310	3.13 ± 0.33
Amphetamine, 2 mg/kg	Day 3	184	3.73 ± 0.27	306	3.35 ± 0.25
Amphetamine, 2 mg/kg	Day 4	174	3.82 ± 0.29	291	3.16 ± 0.27
Amphetamine, 2 mg/kg	Day 5	182	3.61 ± 0.28	280	3.43 ± 0.25
Amphetamine, 2 mg/kg	Challenge 1	149	4.08 ± 0.37	173	3.22 ± 0.28
Amphetamine, 2 mg/kg	Challenge 3	69	3.95 ± 0.34	144	3.29 ± 0.31
Amphetamine, 0.5 mg/kg	Acute	176	3.07 ± 0.19	97	2.83 ± 0.24
Amphetamine, 0.5 mg/kg	Challenge 2	139	3.58 ± 0.22	103	3.36 ± 0.26
Vehicle	Day 1	90	2.91 ± 0.21	79	2.68 ± 0.23
Vehicle	Day 5	80	2.74 ± 0.22	67	3.44 ± 0.41
Vehicle	Challenge 1	67	3.27 ± 0.31	70	3.27 ± 0.42

Baseline (30 min) firing rates during different sessions were not significantly different in mPFC or OFC (one-way ANOVA, p > 0.05).