Table 1.

Mean ± SEM of Acb peak (PR and RFe) and trough (RFi) firing rates across four time epochs relative to the water- or food-reinforced response

Epoch (sec)	Type PR (n = 12)		Type RFe (n = 18)		Type RFi (n = 22)
	Water	Food	Water	Food	Water	Food
Baseline
−10 to −7.5	4.27  ± 1.55	5.14  ± 1.41	2.79  ± 0.53	2.90  ± 0.61	5.41  ± 1.18	5.82  ± 1.19
Response
−2.5 to 0	9.28  ± 2.49	9.33  ± 2.47	2.81  ± 0.49	2.74  ± 0.51	3.73  ± 0.78	4.85  ± 1.13
Reinforcement
0 to 2.5	4.28  ± 1.43	4.39  ± 1.46	4.41  ± 0.65	4.75  ± 0.68	1.88  ± 0.39	2.36  ± 0.76
Recovery
7.5 to 10	3.90  ± 1.54	4.65  ± 1.71	3.96  ± 0.81	4.11  ± 0.89	5.91  ± 1.29	6.38  ± 1.28

Boldface type denotes significant difference (p < 0.05) compared to baseline within the same cell type.