Table 3.

Average discharge rate and instantaneous firing frequency during prestimulation and stimulation conditions of cholinergic, GABAergic, and noncholinergic/non-GABAergic cell groups

	Nb+/VAChT + cells^a		Nb+/GAD + cells^b		Nb+/VAChT−/GAD− cells^c
	Prestimulation	Stimulation	Prestimulation	Stimulation	Prestimulation	Stimulation
Average discharge rate^d
On subgroup^†	0.48 ± 0.29 (11)^b	3.99 ± 1.09 (11)**	3.56 ± 1.17 (14)^a	7.31 ± 1.43 (14)***	1.88 ± 0.79 (15)	6.42 ± 1.88 (15)***
Off subgroup			4.42 ± 1.76 (11)	2.14 ± 1.18 (11)**	4.96 ± 1.77 (12)	1.98 ± 0.86 (12)**
Instantaneous firing frequency^e
On subgroup	1.07 ± 0.51 (9)	3.19 ± 0.68 (11)*	2.80 ± 1.06 (14)	6.39 ± 1.34 (14)**	1.47 ± 0.47 (14)	5.24 ± 1.78 (15)**
Off subgroup			3.91 ± 1.59 (11)	2.99 ± 1.22 (10)	3.69 ± 1.36 (12)	1.44 ± 0.72 (6)

Mean ± SEM values (with number of cells) of average discharge rate and instantaneous firing frequency are presented and compared between the prestimulation and stimulation conditions by nonparametric Wilcoxon tests for each cell subgroup (*p < 0.05; **p < 0.01; ***p < 0.001). Rates and frequencies were compared among cell groups for the prestimulation and stimulation conditions by nonparametric Kruskal–Wallis tests. A main effect of cell group was significant only for the average discharge rate during prestimulation among the On subgroups (^†p < 0.05).
↵^a–cAccording to post-hoc Mann-Whitney (p < 0.017, allowing 3 comparisons), pairwise differences in means are indicated between groups by corresponding letters.
↵^dAverage discharge rate (Hz) calculated for ∼40 s periods of each condition.
↵^eInstantaneous firing frequency (Hz) calculated from the interspike interval modal value for ∼40 s periods having >2 spikes.