Human interdigestive motility: variations in patterns from esophagus to colon

Area of Science:

• Gastroenterology
• Physiology

Background:

• Mammalian fasting mammals exhibit regular gastrointestinal motility cycles.
• Human studies on these patterns are limited, yet disorders are clinically significant.

Purpose of the Study:

• To characterize human interdigestive and postprandial gastrointestinal motility patterns.
• To identify variations in migrating motor complexes (MMC) and their clinical implications.

Main Methods:

• Intraluminal pressure sensors recorded motility in 16 healthy humans during fasting and after meals.
• Recordings spanned the stomach to the proximal colon, including the lower esophagus in some.

Main Results:

• Interdigestive cycles originated in the esophagus, gastroduodenal region, or more distally.
• MMCs were often unrecognizable beyond the small bowel midpoint and slower at night.
• Small meals disrupted motility for 90-240 min, independent of fat content.
• Significant inter- and intra-individual variations in motility were observed, especially between jejunum and ileum.

Conclusions:

• Accurate definition of recording levels is crucial for interpreting potential motility abnormalities.
• Relating local motor patterns to maximal contraction rates may aid in identifying the small bowel level.