Table 1.

Properties of spontaneous activity in WT and SAC-β2-cKO mice during the first postnatal week^a

	Contralateral P2 (n = 3)	cKO P2 (n = 3)	Contralateral P4 (n = 6)	cKO P4 (n = 9)
Firing rate (Hz)	0.19 ± 0.12	0.19 ± 0.03	0.39 ± 0.09	0.35 ± 0.16
Firing rate in wave (Hz)	2.99 ± 0.07	2.32 ± 0.36	3.32 ± 0.43	2.99 ± 0.48
Wave frequency (per min)	0.86 ± 0.06	0.80 ± 0.05	0.78 ± 0.06	0.91 ± 0.36
Wave duration (s)	9.66 ± 0.92	11.07 ± 0.69	12.09 ± 2.05	8.71 ± 0.72**
Wave size (%)	34.97 ± 6.62	24.75 ± 1.04	47.82 ± 4.44	21.89 ± 6.12***
% spikes in burst	72.37 ± 33.83	77.77 ± 29.97	81.32 ± 27.79	76.82 ± 29.80*
Burst frequency (per min)	0.67 ± 0.39	0.68 ± 0.34	0.81 ± 0.92	0.93 ± 0.53*
Burst duration (s)	1.27 ± 0.83	1.47 ± 0.69*	2.16 ± 1.03	2.12 ± 3.85
Interburst interval (s)	90.68 ± 131.6	92.84 ± 85.33	83.99 ± 83.15	73.33 ± 92.87
Interspike interval during burst (s)	0.14 ± 0.11	0.17 ± 0.12*	0.61 ± 5.16	0.64 ± 3.64
Firing rate in burst (Hz)	8.55 ± 4.89	7.08 ± 3.81	8.59 ± 5.66	7.13 ± 4.50***

^aData are mean ± SD. Cholinergic retinal waves are smaller, with shorter wave duration and a lower firing rate per burst in SAC-β2-cKO mice at P4 than in WT, but waves are more normal at P2 when Cre is expressed in a much smaller proportion of SACs.

*p < 0.05;

**p < 0.01;

***p < 0.001.