muscle contraction


  • WordNet 3.6
    • n muscle contraction (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
    • ***


In literature:

Voluntary muscle, on the other hand, has a sharp contraction.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells
When the arm is bent, and we wish to straighten it, it is done by contracting this muscle.
"A Treatise on Domestic Economy" by Catherine Esther Beecher
All over his body the corded muscles contracted in ridges, striving to keep him erect.
"Planet of the Damned" by Harry Harrison
Frequently, it is the best possible exercise to develop the chest since the extension of a muscle also stimulates its right contraction.
"How to Add Ten Years to your Life and to Double Its Satisfactions" by S. S. Curry
But I could feel my heart contract, like a leg-muscle with a cramp in it.
"The Prairie Mother" by Arthur Stringer
Many groups of muscles may be made simultaneously to contract by this means.
"The Electric Bath" by George M. Schweig
Such protracted tension of the muscles enfeebles their action, and ultimately destroys their power of contraction.
"Popular Education" by Ira Mayhew
The muscles contracted when beaten.
"The Big Bow Mystery" by I. Zangwill
Secondly, The electric matter directed through the body of any muscle forces it to contract.
"Experiments and Observations on Different Kinds of Air" by Joseph Priestley
The passage is forced by the powerful contractions of the muscles of the womb.
"The Sexual Question" by August Forel

In news:

Nighttime (or nocturnal) leg cramps are a sudden tightening (contraction) of the leg muscles, usually in the calf.
A charley horse is a painful knot in the muscles, often in the calf, as the muscle fibers contract and go into a spasm.
Hand Sanitizer May Impair Muscle Contraction .
During parasympathetic stimulation, blood is directed inward to our digestive tract and muscle contractions along this tract increase, allowing the breakdown and movement of digesting food.
Attached to high voltage wires, once these probes enter a body, embedding less than a quarter inch in the skin, they send an electric pulse that causes muscles to contract, disabling a suspect almost immediately.
Earthworms creep along the ground by alternately squeezing and stretching muscles along the length of their bodies, inching forward with each wave of contractions.
Earthworms creep along the ground by alternately squeezing and stretching muscles along the length of their bodies, inching forward with each wave of contractions.
Use a slightly deflated ball or a small, firm pillow to support your lower back so you can contract your abs and biceps muscles at the same time.
Hand Sanitizer May Impair Muscle Contraction.
Some songbirds can contract their vocal muscles with the fastest muscle movements yet described — about 100 times faster than humans can blink an eye, according to new research.
Ferguson's lawyer Michael Rataj tried to poke holes in the government 's claim that Ferguson muscled his way into contracts and unfairly used his ties to Kilpatrick to win deals.
This cardiac muscle enables the heart to contract and allows the synchronization of the heartbeat.
Are caused by an overactive bladder muscle that contracts without warning leading to unexpected urine leakage, said lead study author, Dr Anthony.
His name is Dergin Tokmak and as a child he contracted polio , which is a virus that attacks the nerves that control muscle function.
Potassium is critical for helping nerves transmit signals, muscles contract and cells maintain fluid balance inside and out.

In science:

However, it is an automatic consequence of the physics-based theory: creating physical force by muscle contraction requires an effort that opposes the physical tendencies generated by the Schroedinger equation.
Quantum theory and the role of mind in nature
Active phenomena which involve force generation and motion play a key role in a number of phenomena in living cells such as cell motility, muscle contraction and the active transport of material and organelles.
Mechanical oscillations at the cellular scale
Prominent examples are cell motility, the contraction of muscles but also active transport of materials and of organelles, for example during cell division and mitosis.
Mechanical oscillations at the cellular scale
Many insects such as wasps and bees have muscles called ”asynchronous” which generate oscillatory contractions by a mechanism located in the muscle itself which drives the beating of the wings.
Mechanical oscillations at the cellular scale
This type of muscle differs from ”synchronous” flight muscles of some other insects for which contractions are triggered by a periodic nerve signal and are not generated in the muscle.
Mechanical oscillations at the cellular scale