Table 2.

Mean ± SEM of Acb neurons exhibiting phasic cell firing relative to the water- but not cocaine-reinforced response

Epoch (sec)	Type PR (n= 14)		Type RFe (n = 9)		Type RFi (n = 6)
	Water	Cocaine	Water	Cocaine	Water	Cocaine
Baseline
−10 to −7.5	2.54  ± 0.68	1.99  ± 0.69	3.02  ± 0.39	1.42  ± 0.35	2.59  ± 0.83	0.88  ± 0.67
Response
−2.5 to 0	6.30  ± 1.49	2.44  ± 0.84	2.53  ± 0.50	1.38  ± 0.29	1.75  ± 0.49	1.17  ± 0.69
Reinforcement
0 to 2.5	2.98  ± 0.77	2.29  ± 0.85	5.77  ± 1.43	1.03  ± 0.51	0.96  ± 0.32	1.03  ± 0.51
Recovery
7.5 to 10	2.37  ± 0.69	1.86  ± 0.74	4.64  ± 0.80	1.58  ± 0.33	3.31  ± 1.33	0.95  ± 0.62

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