Normal physiologic changes in the upper GI tract during sleep [10]

LocationPhysiologic changes
Oropharynx

Decreased:

  • Salivary secretion and flow

  • Swallowing rate

Esophagus

Decreased:

  • Esophageal peristalsis

  • Esophageal acid clearance

  • Upper esophageal sphincter pressure

  • Perception of intraesophageal stimuli

Stomach

Increased:

  • Gastric acidity

Decreased:

  • Gastric emptying

Note. Adapted with permission from “Sleep and gastrointestinal health,” by D’Souza SM, Fass R, Shibli F, Johnson DA. In: Kryger MH, Roth T, Goldstein CA, editors. Principles and practice of sleep medicine. 7th ed. Amsterdam: Elsevier; 2022. pp. 1557–64 (https://www.us.elsevierhealth.com/principles-and-practice-of-sleep-medicine-2-volume-set-9780323661898.html). © 2022 Elsevier.