Muscle
hideMuscle (from Latin musculus, diminutive of mus "mouse") is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to produce force and cause motion. Muscles can cause either locomotion of the organism itself or movement of internal organs. Cardiac and smooth muscle contraction occurs without conscious thought and is necessary for survival. Examples are the contraction of the heart and peristalsis which pushes food through the digestive system. Voluntary contraction of the skeletal muscles is used to move the body and can be finely controlled. Examples are movements of the eye, or gross movements like the quadriceps muscle of the thigh. There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.
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News tagged with muscle
New genetic cause of cardiac failure discovered
Nov 25, 2009 |
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Over the course of a lifetime, the heart pumps some 250 million liters of blood through the body. In the order to do this, the muscle fibers of the heart have to be extremely durable. The research group headed by Dr. Wolfgang ...
Abnormal cholesterol levels may raise risk of heart failure
Nov 23, 2009 |
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(PhysOrg.com) -- Even if you never have a heart attack, abnormal blood cholesterol levels may significantly raise your risk of heart failure, according to research reported in Circulation: Journal of the American Heart As ...
Systems biology approach provides insulin resistance insights
Nov 23, 2009 |
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Researchers from the University of California, San Diego recently offered the sharpest-yet picture of how core biochemical pathways in skeletal muscle cells and fat cells are altered in people who suffer from ...
Carvedilol shown to have unique characteristics among beta blockers
Medicine & Health / Medications
Nov 20, 2009 |
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In a new study, researchers report that a class of heart medications called beta-blockers can have a helpful, or harmful, effect on the heart, depending on their molecular activity.
Drug for erectile dysfunction improves heart function in young heart-disease patients
Nov 18, 2009 |
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Heart function significantly improved in children and young adults with single-ventricle congenital heart disease who have had the Fontan operation following treatment with sildenafil, a drug used to treat erectile dysfunction ...
5 exercises can reduce neck, shoulder pain of women office workers
Nov 18, 2009 |
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Strength training exercises using dumbbells can reduce pain and improve function in the trapezius muscle, the large muscle which extends from the back of the head, down the neck and into the upper back. The exercises also ...
Your own stem cells can treat heart disease
Nov 17, 2009 |
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The largest national stem cell study for heart disease showed the first evidence that transplanting a potent form of adult stem cells into the heart muscle of subjects with severe angina results in less pain and an improved ...
Protein changes in heart strengthen link between Alzheimer's disease and chronic heart failure
Nov 16, 2009 |
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A team of U.S., Canadian and Italian scientists led by researchers at Johns Hopkins report evidence from studies in animals and humans supporting a link between Alzheimer's disease and chronic heart failure, two of the 10 ...
An often overlooked protein actually a potent regulator of cardiac hypertrophy
Nov 16, 2009 |
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A protein long thought to be a secondary regulator in the heart's response to stressors like hypertension actually appears to be a primary regulator according to researchers from the Center for Translational Medicine at Thomas ...
Investigating muscle repair, scientists follow their noses
Nov 16, 2009 |
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When muscle cells need repair, they use odor-detecting tools found in the nose to start the process, researchers have discovered.
Study provides first clear idea of how rare bone disease progresses
Nov 12, 2009 |
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An international team of scientists, led by researchers at the University of Pennsylvania School of Medicine, is taking the first step in developing a treatment for a rare genetic disorder called fibrodysplasia ...
Longer toes eyed as sprinters' edge
Nov 12, 2009 |
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(PhysOrg.com) -- Longer toes may give sprinters a leg up on other runners, according to a new study.
Treatment to improve degenerating muscle gains strength
Nov 11, 2009 |
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A study appearing in Science Translational Medicine puts scientists one step closer to clinical trials to test a gene delivery strategy to improve muscle mass and function in patients with certain degenerative muscle disord ...
Reduced muscle strength associated with risk for Alzheimer's
Medicine & Health / Neuroscience
Nov 09, 2009 |
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Individuals with weaker muscles appear to have a higher risk for Alzheimer's disease and declines in cognitive function over time, according to a report in the November issue of Archives of Neurology.
Ancient muscle tissue extracted from 18 million year old fossil
Other Sciences / Archaeology & Fossils
Nov 05, 2009 |
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(PhysOrg.com) -- Scientists have extracted organically preserved muscle tissue from an 18 million years old salamander fossil. The discovery by researchers from University College Dublin, the UK and Spain, ...
