Insufficient trituration of food may increase the functional burden on the stomach and delay gastric emptying. However, previous studies have suggested that gastric emptying is not affected by the particle-size distribution of the swallowed food if masticatory activity is retained. This finding may be related to the prokinetic effect of mastication on gastric motility via the cephalic-vagal reflex, and increased gastric motility in turn may hasten gastric emptying. Using cutaneous electrogastrography (EGG), we investigated whether nonfeeding gum chewing, termed additional gum chewing (AGC) here, before a meal that is deliberately chewed inadequately increases postprandial gastric motility. Our EGG results showed that the acceleration effect of AGC was rapid and significant, although it lasted less than 30min. The cumulative gastric motility after AGC was nearly comparable with that after eating with sufficient mastication. Thus, AGC and similar techniques may help improve gastric motility in subjects with reduced masticatory activity.
- Gum chewing
- Postprandial gastric motility
ASJC Scopus subject areas
- Food Science
- Pharmaceutical Science