Table 1. Paired pulse ratios for GABA/gly component.

	Ca++ (0.1 mM)				Ca++(2.0 mM)				Ca++ (4.0 mM)
	10 Hz	20 Hz	50 Hz	100 Hz	10 Hz	20 Hz	50 Hz	100 Hz	10 Hz	20 Hz	50 Hz	100 Hz
P1–2 (6)	1.1±0.1	1.2±0.3	0.9±0.1*	1.1±0.1	1.0±0.1	0.9±0.1	0.4±0.1*?	0.3±0.1∼	0.7±0.1	0.4±0.1?	0.1±0.1*	0.02±0.1?
P3–5 (7)	1.1±0.1	1.1±0.1	1.3±0.2	1.5±0.2	0.9±0.1	0.8±0.1	0.8±0.1	0.6±0.2	0.8±0.1	0.7±0.1	0.5±0.1	0.1±0.1*
P7–8 (6)	1.3±0.2	1.7±0.2	3.2±0.1*	1.4±0.1	0.8±0.1	0.8±0.1	1.0±0.1*	0.3±0.1	0.8±0.1	0.8±0.1	0.9±0.1*	0.3±0.1
P11–12 (5)	1.0±0.1	1.0±0.4	1.7±0.4	2.6±1.0	0.8±0.1	0.9±0.1	0.9±0.1?	1.0±0.1∼	0.7±0.1	0.9±0.1?	0.6±0.1	0.8±0.1?*

Paired-pulse ratios for the GABA/gly component for different external Ca⁺⁺ concentrations, stimulation frequencies, and postnatal age. Non-parametric 1-way ANOVA (Kruskal-Wallis test) across age revealed significant differences between young and older ages in 2 and 4 mM Ca⁺⁺ (Bonferroni's post hoc *<0.05, ?<0.005, ∼0.0005). The N for each age group is shown in parentheses.