Table 2.

[Ca²⁺]_i dynamics in D1R-EGFP and D2R-EGFP neurons in chronic mice

	D₁R EGFP mice					D₂R EGFP mice
	Chronic				Acute^am	Chronic					Acute^{^a}m
	S1	S2	S3	m	Acute^am	S1	S2	S3	S4	m	Acute^{^a}m
Cells (n)	10	13	6	3	4	6	13	12	15	4	7
t₀ (min)	6.10 ± 0.68	3.83 ± 0.85	1.90 ± 0.49	3.94 ± 2.1		0.59 ± 0.98	0.00 ± 0.56	0.28 ± 0.36	0.75 ± 0.7	0.40 ± 0.33
k₂ (%/min)	0.29 ± 0.01	0.32 ± 0.01	0.68 ± 0.03	0.43 ± 0.01	0.05 ± 0.05	−0.071 ± 0.003	−0.029 ± 0.004	−0.12 ± 0.01	−0.26 ± 0.01	−0.12 ± 0.10	−0.39 ± 0.15
k₁ (%/min)	0.27 ± 0.03	0.33 ± 0.03	0.72 ± 0.02	0.44 ± 0.02	0.77 ± 0.20	−0.07 ± 0.01	−0.03 ± 0.01	−0.12 ± 0.02	−0.25 ± 0.02	−0.12 ± 0.09	−0.40 ± 0.13
r = k₂/k₁	1.08 ± 0.14	0.967 ± 0.09	0.944 ± 0.06	0.999 ± 0.07	0.06 ± 0.23	1.08 ± 0.013	1.07 ± 0.047	1.00 ± 0.025	1.04 ± 0.012	1.04 ± 0.03	0.97 ± 0.26

t₀, Delay of [Ca²⁺]_i change to acute cocaine; m, animal number; n, number of selected neurons per mouse; k₁, k₂, slope K_p = Δ[Ca²⁺]_i/Δt for phase 1 (p = 1, t₀ ≤ t ≤ t_p) and phase 2 (p = 2, t ≥ t_p).
↵^aLuo, et al. (2011); m = animal numbers.