peristalsis
Let an agent explain peristalsis and its control, relay physiology across organs from medical references, describe disorders and the significance of visible peristalsis in general terms with routing to clinicians, and distinguish peristalsis from segmentation, mass movements and voluntary muscle action.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain peristalsis and its control, relay physiology across organs from medical references, describe disorders and the significance of visible peristalsis in general terms with routing to clinicians, and distinguish peristalsis from segmentation, mass movements and voluntary muscle action.
The wave-like contraction and relaxation of smooth muscle that moves contents along a tubular organ, most familiarly in the oesophagus, stomach and intestines where it propels food and waste, and also in the ureters carrying urine to the bladder, the bile ducts and the fallopian tubes; peristalsis is normally invisible, and visible peristalsis through the abdominal wall can be a sign of obstruction requiring medical assessment.
What it is for: Moving contents along tubular organs.
It can be explain the mechanism; relay physiology by organ; describe disorders with routing; distinguish related movements.
Distinguishing features
Smooth muscle wave
Enteric nervous control
Multiple organs
Clinical sign when visible
What it looks like
Not a visible object; rhythmic contractions, occasionally visible through the abdomen.
Physical character
oesophageal wave speed: about 2-4 cm per second
small intestine transit: about 2-6 hours
ureteric waves: about 1-5 per minute
How it is recognised
Wave-like smooth muscle propulsion
Gut, ureteric, oesophageal peristalsis; visible peristalsis
Segmentation mixes without propelling; mass movements are strong colonic waves; skeletal muscle is voluntary
Related models
is a kind of - in registry terms
is controlled by - with hormonal input
is contrasted with - which mixes rather than propels
is mimicked by - in engineering
In practice
Families and kinds
oesophageal peristalsis
gastric and intestinal peristalsis
colonic mass movements
ureteric peristalsis
peristalsis in bile ducts and fallopian tubes
peristalsis in invertebrates and in engineering pumps
Standards and regulation
No regulation; clinical guidelines for motility disorders
Failure modes and hazards
Ileus and obstruction
Agents giving personal medical advice
Confusing peristalsis with other gut movements
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.peristalsis
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What peristalsis is.
Science.
Definition
Definition and mechanism.
Definition
Definition.
- What is peristalsis, and how does it differ from segmentation, mass movements and voluntary muscle action? definition
- Is the question about physiology, an organ or a personal symptom needing a clinician? boundary
Organs
By organ.
Organs
Organs.
- How does peristalsis work in the oesophagus, stomach, intestines, ureters and other tubes? definition
- Which entry fits the specific organ? action
Control Control.
Science.
Nervous
Nervous control.
Nervous
Nervous.
- How do the enteric nervous system, pacemaker cells and hormones coordinate peristalsis? provenance
- Which references are standard? provenance
Development
Development and evolution.
Development
Development.
- How does peristalsis develop, and how widespread is it across animals? provenance
- Which sources are cited? provenance
Clinical Clinical relevance.
Clinical.
Disorders
Disorders.
Disorders
Disorders.
- What disorders affect peristalsis, such as achalasia, ileus and gastroparesis, in general terms? provenance
- Is the user describing symptoms of their own, which need a clinician? boundary
Signs
Visible peristalsis.
Signs
Signs.
- What does visible peristalsis indicate, and why does it need assessment? provenance
- Which entry fits bowel obstruction? action
Context Applications and history.
Context.
Engineering
Peristaltic pumps.
Engineering
Engineering.
- How do peristaltic pumps and soft robots imitate peristalsis? provenance
- Which entry fits peristaltic pump? action
History
History.
History
History.
- How was peristalsis described by Bayliss and Starling and others? provenance
- Which entry fits the history of physiology? action
What the second pass must settle
- Should ureteric peristalsis and motility disorders be separate entries?
- How should medical references be linked?
- How should the clinical sign of visible peristalsis be recorded?