Gastric Contractile Activity
Gastric Contractile Activity - Related Videos
09:49
Procedures for Rat in situ Skeletal Muscle Contractile Properties
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Cited by 18 •
2011
This video demonstrates the surgical preparation and procedures needed to study the contractile responses of the rat medial gastrocnemius muscle preparation in situ. This preparation allows measurement of skeletal muscle contractile properties under physiological conditions. The animal is anesthetized and the muscle is separated from surrounding tissue at its distal end. The Achilles tendon is attached to a force transducer, allowing measurement of the muscle’s contractile response at 37...
02:15
The Contractile Ring
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2023
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle. A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
02:15
The Contractile Ring
0 Views •
2021
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle. A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
05:18
Roux-en-Y Gastric Bypass Procedure: A Bariatric Surgical Procedure for Gastric Resectioning in Murine Model
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2025
This video describes a bariatric surgery-Roux-en-Y procedure. This involves the cutting of the jejunum- the middle portion of the intestine- to generate two intestinal limbs. The biliary limb is attached to the existing intestinal loop and the alimentary limb is attached to the stomach, creating a gastric bypass. The gastric bypass created here helps to decrease the nutrient uptake and efficiently reduces body weight.
08:08
Measurement of Cytosolic Ca2+ in Isolated Contractile Lymphatics
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Cited by 24 •
2011
We introduce an approach to evaluate the cytosolic Ca2+ concentration in isolated lymphatics to study Ca2+-dependent and Ca2+-sensitizing mechanisms of lymphatic smooth muscle contraction.
FAQs
Electrical slow waves provide the timing framework for gastric muscle contraction, but they do not alone describe the full mechanical response. Calcium-dependent excitation-contraction coupling converts this electrical activity into force-producing smooth-muscle behavior. This distinction matters in bioengineering because measurements can separately consider electrical coordination and resulting movement when evaluating how closely an engineered tissue reproduces gastric function.
Neural signals, hormones, and mechanical distension modify the contractile pattern after the muscle’s intrinsic electrical activity has established a baseline. Distension therefore links the physical state of stomach contents to motility, while enteric input and hormonal signals provide additional regulation. Including these influences in an experimental model helps distinguish autonomous muscle behavior from responses that depend on surrounding gastrointestinal control.
Analyzing gastric contractile activity at both cellular and organ levels links force generation with coordinated motility. Cellular measurements can reveal mechanical behavior in smooth muscle, whereas organ-level patterns show how movements mix contents and propel chyme. This multiscale perspective is valuable for validating engineered gastric tissues and interpreting whether they reproduce functional gastrointestinal behavior.
Imaging, force sensors, and engineered gastric tissues provide complementary ways to quantify gastric motility. Imaging can capture movement patterns, while force sensors assess mechanical output; engineered tissues offer a controlled platform for studying contraction. Selecting among these approaches depends on whether the goal is to characterize motion, measure force, or develop a model for testing biological or engineered interventions.
They are useful when researchers need an in vitro system that connects smooth-muscle mechanics with organ-level motility. Such tissues can support evaluation of drugs and biomaterials while providing a controlled setting for observing contractile patterns. Their value lies in linking engineered tissue behavior to gastrointestinal function, which supports more predictive research on motility and potential interventions.
Quantifying contractile patterns with imaging, force sensors, or engineered gastric tissues can help model motility disorders such as gastroparesis. The data make movement measurable for comparing how experimental systems behave under defined conditions. In bioengineering, this supports assessment of drug and biomaterial effects while connecting model performance to gastrointestinal motility research.