Contractile Waves
Contractile Waves - Related Videos
14:02
Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles
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Cited by 53 •
2012
We describe a method to directly measure muscle force, muscle power, contractile kinetics and fatigability of isolated skeletal muscles in an in vitro system using field stimulation. Valuable information on Ca2+ handling properties and contractile machinery of the muscle can be obtained using different stimulating protocols.
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...
09:32
Standing Waves
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Standing waves, or stationary waves, are waves that appear not to propagate and are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude. These waves appear to vibrate up and down with no linear movement and are most easily identified in vibrating finite media like a plucked guitar string,...
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
At a local site, activation of contractile machinery involving actin and myosin produces force. That force is transmitted to neighboring regions through mechanical coupling or signaling, allowing adjacent areas to activate or contract in sequence. The resulting propagation coordinates activity across space, linking molecular force generation with larger-scale changes in cell or tissue shape.
Mechanical coupling distinguishes a traveling wave from an isolated contraction because force does not remain confined to its original site. Neighboring regions become part of a coordinated sequence, so contraction can produce organized shape changes, movement, or material transport. This spatial transmission explains how local cytoskeletal activity can influence behavior across a cell or tissue.
Signaling provides an alternative or complementary route for propagating contractile activity beyond direct mechanical transmission. A locally activated region can therefore influence neighboring regions through biological communication as well as transmitted force. Considering both routes helps explain how coordinated contractions support changes in cell shape, movement, and tissue-level behavior.
Quantitative imaging can track where contractile activity begins and how it moves through a cell or tissue. Force measurements add information about the mechanical output associated with that activity. Used together, these approaches connect the observed spatial pattern of contraction with the forces generated by the cytoskeleton and their effects on biological organization.
Their coordinated activity is relevant to cell migration, epithelial remodeling, morphogenesis, and gut motility. In each setting, propagating contraction can organize changes in shape or movement across more than one local region. Studying the waves therefore helps relate cytoskeletal force generation to larger biological outcomes, from rearranging epithelial tissues to moving material through the gut.
These contexts show how coordinated mechanical activity can shape tissues rather than only individual cells. Contractile waves provide a framework for examining how local actin and myosin activity contributes to organized tissue changes during epithelial remodeling and morphogenesis. Quantitative measurements can help connect the underlying forces with the resulting changes in tissue form.