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 strength
Medical robotics expert explores the human-machine interface
Jan 14, 2009 |
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(PhysOrg.com) -- Jacob Rosen, associate professor of computer engineering at the Jack Baskin School of Engineering, University of California, Santa Cruz, is developing a wearable robotic "exoskeleton" that ...
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.
Triggering muscle development -- a therapeutic cure for muscle wastage?
Jul 01, 2009 |
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Scientists in the UK and Denmark have shown that if elderly men were given growth hormone and exercised their legs showed an appreciable muscle mass increase.
Researchers discover target that could ease spinal muscular atrophy symptoms
Jan 07, 2009 |
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is no cure for spinal muscular atrophy (SMA), a genetic disorder that causes the weakening of muscles and is the leading genetic cause of infant death, but University of Missouri researchers have discovered a new therapeutic ...
Exercise programs recommended as standard for rheumatoid arthritis
Oct 07, 2009 |
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Exercise programs designed to improve strength and stamina are safe and effective treatments for rheumatoid arthritis (RA), according to a new Cochrane Systematic Review. The researchers reviewed dynamic exercise program ...
Athletes With Smaller ACLs May Be More Susceptible To Injury
Sep 14, 2009 |
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(PhysOrg.com) -- A study comparing images of the knees in people who did and didn't have previous injuries to the anterior cruciate ligament suggests that people who tore their ACLs are more likely to have a smaller ligament ...
1st US 2-hand transplant patient yearns to feel
Jul 17, 2009 |
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(AP) -- The nation's first double hand transplant patient can wriggle his new fingers a litte bit now and grab a tennis ball, but what he really wants to do is be able to feel his wife's hands when he holds ...
Progressive resistance strength training helps older people in daily life
Jul 08, 2009 |
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Progressive resistance strength training not only helps older adults become stronger but also makes their everyday life easier, a Cochrane Review suggests.
Women recover muscle strength more slowly than men
Sep 25, 2008 |
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Women's muscles may require longer, more intensive rehabilitation after bed rest and cast immobilization, as reported today by the Institute for Neuromusculoskeletal Research at the Ohio University College of Osteopathic ...
The benefits of a little resistance for older adults
Jul 18, 2008 |
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University of Queensland research is showing the benefits of resistance training in keeping older Australians in tip top form.
