Effects of intragastric infusion of inosine monophosphate and l-glutamate on vagal gastric afferent activity and subsequent autonomic reflexes

Table 2 Effects of intragastric infusion of umami substances on vagal celiac and sympathetic adrenal efferent activity

	Nerve discharge rate (impulses/5 s ± SEM)
	30 mM IMP	150 mM MSG
Vagal celiac efferent
Normal gastric afferent
Before	64.2 ± 4.6	60.5 ± 1.7
After 30 min	78.8 ± 7.5*	75.5 ± 3.8**
ΔDischarge rate	14.6 ± 3.4	15.1 ± 4.8
Vagotomized
Before	59.6 ± 2.1	73.1 ± 2.2
After 30 min	60.4 ± 1.8	73.9 ± 1.3
ΔDischarge rate	0.8 ± 0.8	0.2 ± 1.9
Sympathetic adrenal efferent
Normal gastric afferent
Before	53.0 ± 1.7	50.4 ± 5.5
After 30 min	68.1 ± 3.4*	95.2 ± 5.7**
ΔDischarge rate	15.0 ± 3.0	44.9 ± 7.1
Vagotomized
Before	68.1 ± 1.4	66.9 ± 4.3
After 30 min	68.3 ± 3.3	70.5 ± 4.1
ΔDischarge rate	0.8 ± 1.8	3.6 ± 1.7

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