Table 3.

Average values of PN burst frequency (freq) and amplitude (amp), times of inspiration (Ti) and expirtion (Te), cVN post-I mean activity and duration, and mean activity of AbN during E1 and E2 phases of in situ preparations of control rats during baseline (normocapnia), hypercapnia (8% CO₂), before and after bilateral microinjections of strychnine in the BötC (n=7).

	Baseline	Hypercapnia	Baseline after strychnine	Hypercapnia after strychnine
PN freq (bpm)	23±11	21±10	22±9	21±8
PN amp (μV)	30.6±10.2	31.6±14.8	22.8±10.3*	23.6±10.1
Ti (s)	0.87±0.32	0.81±0.28*	1.01±0.32	0.97±0.32#
Te (s)	2.76±1.58	3.15±1.57*	1.61±0.73*	1.78±0.83
cVN activity (μV)	21.4±1.6	21.9±1.2	17.8±2.6*	18.4±2.5
cVN duration (% Te)	75±10	71±8	60±17*	57±14
AbN during E1 (μV)	3.2±1.5	3.0±1.6	2.6±1.6	2.4±1.0
AbN during E2 (μV)	6.4±1.5	9.4±1.3*	4.7±2.1*	6.0±2.6#†

^*- different from baseline,

^#- different from baseline after strychnine,

^†- different from hypercapnia;

P<0.05 (RM one-way ANOVA followed by Bonferroni’s post-hoc test).