The purpose of this research is to establish the normal range of diameter and distensibility of pylorus and the fasting and postprandial antro-pyloric motility in healthy adults.

An Endoflip catheter will be placed through the mouth into the stomach in order to measure distal antral contractile activity and pyloric diameter and distensibility during fasting and after the ingestion of a standard meal

Inclusion Criteria:

• Females and males.
• Between the ages of 18 and 65 years.
• Body mass index between 18 and 35 kg/m^2.

Exclusion Criteria:

• Heartburn, regurgitation, or symptoms suggestive of gastroparesis such as nausea, early satiety, postprandial bloating, and upper abdominal pain.
• Pregnant

equal number of males and females will be recruited for this study in up to 45 adults

healthy adults between the ages of 18 and 65 with body mass indices between 18 and 35 kilograms/meter squared will be recruited for this study