Numerous studies showed that, gastric motility hyperfunction and gastric acid over-secretionwere two key factors of gastric mucosal injury induced by the restraint water-immersion stressin peripheral in rats. The two factors were incited by the parasympathetic hyperactivity in stress.The parasympathetic nerves innervating the gastrointestinal tract are mainly originated from thedorsal motor nucleus of the vagus (DMV) and the nucleus ambiguous (NA) in the medullaoblongata, and the gastrointestinal sensory ne...