Propulsive Motility
Propulsive Motility - Related Videos
08:15
Gastrointestinal Motility Monitor (GIMM)
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Cited by 36 •
2010
Evaluation of colonic motility in the guinea pig distal colon with the Gastrointestinal Motility Monitor (GIMM) is a straightforward and simple to learn approach to quantitatively evaluate propulsive motility in the gastrointestinal tract.
10:50
Propulsion and Thrust
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2023
Source: Alexander S Rattner; Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA Aircraft, rockets, and ships produce propulsion by accelerating surrounding fluid or high temperature combustion products to high velocity. Because of the principle of conservation of momentum, the increased fluid velocity results in an effective thrust force on the vehicle. The thrust capabilities of propulsion systems are often measured with static thrust tests.
01:03
Rocket Propulsion in Gravitational Field - II
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2023
A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum. A rocket's acceleration depends on three major factors, consistent with the equation for the...
12:00
Spatiotemporal Mapping of Motility in Ex Vivo Preparations of the Intestines
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Cited by 26 •
2016
Recently available video recording and spatiotemporal mapping (STmap) techniques make it possible to visualize and quantify both propagating and mixing patterns of intestinal motility. The goal of this protocol is to explain the generation and analysis of STmaps using the GastroIntestinal Motility Monitoring (GIMM) system.
08:52
An Introduction to Cell Motility and Migration
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2023
Cell motility and migration play important roles in both normal biology and in disease. On one hand, migration allows cells to generate complex tissues and organs during development, but on the other hand, the same mechanisms are used by tumor cells to move and spread in a process known as cancer metastasis. One of the primary cellular machineries that make cell movement possible is an intracellular network of myosin and actin molecules, together known as “actomyosin”, which creates a...
FAQs
Forward transit depends on a coordinated spatial pattern: smooth-muscle contraction develops behind luminal contents, while muscle ahead relaxes. This arrangement creates progression through the gastrointestinal tract rather than merely changing muscle activity. Because propulsion requires contraction and relaxation in sequence, disruption of either phase can alter how efficiently material advances through the tubular organ.
The enteric nervous system organizes the local pattern of gastrointestinal movement, while autonomic signals modify that activity. Chemical stimuli within the local environment also influence the response. Together, these regulatory inputs determine how strongly and appropriately smooth muscle contracts and relaxes, making propulsive motility a regulated process rather than an isolated property of the muscle.
Prokinetic drugs are used pharmacologically to enhance gastrointestinal transit, whereas antidiarrheal agents slow intestinal movement. These opposing effects illustrate how changing the activity that produces propulsion can alter the passage of luminal contents. Comparing both drug classes helps researchers and clinicians connect changes in motility with desired therapeutic outcomes or unwanted gastrointestinal effects.
A medication that changes the normal pattern or rate of gastrointestinal movement can disturb transit. Slower movement may delay the passage of contents and contribute to constipation, while other alterations can produce broader changes in gastrointestinal function. Examining the underlying contraction-relaxation pattern helps distinguish a drug’s intended effect from an unwanted consequence.
Pharmacological evaluation focuses on how a treatment changes gastrointestinal transit or movement. Researchers can use these measured effects to determine whether an agent enhances propulsion, slows it, or produces an altered pattern. Such assessments support drug development by linking a compound’s action with its functional gastrointestinal outcome, and they also inform the study of motility disorders.
The framework is useful whenever abnormal transit or movement is part of the research question. It allows investigators to examine whether a drug could correct insufficient propulsion, reduce excessive intestinal movement, or contribute to constipation. Relating the observed outcome to enteric, autonomic, and local regulatory influences provides context for interpreting treatment effects in motility disorders.
Measurements can show the direction and functional consequence of a drug’s gastrointestinal action. An increase in transit supports an enhancing effect, whereas reduced intestinal movement indicates slowing. These outcomes help characterize pharmacological activity, compare intended and adverse effects, and determine how a compound may influence digestion, absorption, elimination, or clinically relevant gastrointestinal function.