Effects of nuclei ambiguus and dorsal motor nuclei of vagus on gastric H+ and HCO3- secretion in rats

Table 1 Effects of stimulation of NA on gastric H⁺ and HCO₃^- secretion after pylorus ligation (mean ± SD)

	n = 8	Gastric juice(mL/3 h)	Titratable H+quantum(μmol/3 h)	H+ concentration(mol/L)	HCO3- quantum(μmol/3 h)
Right	Control group	0.35 ± 0.18	47.6 ± 14.1	0.17 ± 0.08	11.0 ± 1.85
Right	Stimulus group	0.45 ± 0.24	43.1 ± 13.0	0.12 ± 0.09	15.8 ± 1.46b
Left	Control group	0.48 ± 0.23	46.6 ± 20.1	0.11 ± 0.05	10.8 ± 3.2
Left	Stimulus group	0.70 ± 0.30	58.0 ± 17.0	0.09 ± 0.03	17.2 ± 1.7b

^bP < 0.01.

Table 2 Effects of stimulation of DMV on gastric H+ and HCO3- secretion after pylorus ligation (mean ± SD)

	n = 8	Gastric juice	Titratable H+	H+concentration	HCO3- quantum
		(mL/3 h)	(μmol/3 h)	(mol/L)	(μmol/3 h)
Right	Control group	0.62 ± 0.17	49.0 ± 12.5	0.08 ± 0.02	11.0 ± 3.4
Right	Stimulus group	1.00 ± 0.23a	109.0 ± 21.7b	0.11 ± 0.01a	10.2 ± 2.6
Left	Control group	0.67 ± 0.14	60.8 ± 14.3	0.09 ± 0.02	9.0 ± 3.6
Left	Stimulus group	0.97 ± 0.21a	115.8 ± 16.5b	0.13 ± 0.03a	11.5 ± 3.1

^aP < 0.05,

^bP < 0.01.

Table 3 Effects of stimulation of NA and DMV on respiratory frequency and heart rate (mean ± SD)

	n = 8	Respiratory frequency(times/min)	Inhibitory rate ofrespiratoryfrequency(%)	Heart rate(beats/min)	Inhibitory rate ofheart rate(%)
Right NA	Control	91.2 ± 19.4		394.3 ± 70.1
	Stimulation	34.9 ± 23.0b	51.5 ± 17.3	261.7 ± 77.1b	29.1 ± 8.9
Left NA	Control	101.8 ± 23.2		385.1 ± 37.6
	Stimulation	45.6 ± 19.8b	64.7 ± 19.7	244.5 ± 44.3b	29.4 ± 12.3
Right DMV	Control	100.3 ± 7.6		402.8 ± 47.9
	Stimulation	48 ± 11.5b	51.6 ± 12.3	268.5 ± 62.4b	34.2 ± 9.7
Left DMV	Control	102.8 ± 13.0		412.5 ± 33.3
	Stimulation	60 ± 11.4b	41.3 ± 11.4	295.5 ± 52.2b	28.4 ± 10.7

^bP < 0.01.