Physio 27: Gastrointestinal Motility

Digestion is not only about chemical breakdown—it depends on timing, direction, and rhythm. Without carefully regulated movement, even perfect digestion and absorption would fail.In this episode, Medlock Holmes investigates gastrointestinal motility: the orchestrated contractions that mix, propel, and pause contents as needed. We explore peristalsis, segmentation, sphincter control, and the roles of the enteric nervous system, autonomic input, and local reflexes.Rather than viewing motility as a conveyor belt, this episode reframes it as a dynamic choreography, adjusting pace and pattern according to location, content, and physiological state.Here, physiology teaches that movement is meaningful only when it is well-timed.Key Takeaways* Gastrointestinal motility ensures effective mixing and propulsion* Peristalsis and segmentation serve distinct physiological purposes* The enteric nervous system coordinates local control* Autonomic input modulates, rather than dictates, motility* Disordered motility disrupts digestion even when enzymes are intact This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit drmanaankarray.substack.com/subscribe