Table 1.

Effects of intragastric infusion of taste substances on gastric vagal afferent activity

Taste substances	Gastric afferent discharge rate (impulses/5 s ± SEM)
	Before	After 30 min	ΔDischarge rate
Umami
30 mM IMP	64.5 ± 1.3	86.5 ± 3.9**	22.0 ± 3.8
150 mM MSG	65.6 ± 4.7	89.7 ± 7.4**	24.1 ± 4.0
Sweet
277.5 mM Glucose	57.2 ± 4.5	55.4 ± 3.6	−1.8 ± 1.7
292.1 mM Sucrose	57.7 ± 3.2	55.6 ± 2.1	−2.1 ± 2.9
Salty
154 mM NaCl	61.3 ± 2.9	60.0 ± 1.8	−1.3 ± 1.9
Hypotonic solution
30 mM Mannose	55.8 ± 3.2	54.5 ± 2.9	−1.4 ± 2.6

** p < 0.01, paired t test