Neuroscience

Nerve transfer promising for acute flaccid myelitis patients

(HealthDay)—Two patients diagnosed with acute flaccid myelitis and upper-extremity neuropathy who were treated with peripheral nerve transfer continue to demonstrate functional recovery at two years, according to a case ...

Medical research

Scientists make strides in creation of clinical-grade bone

A team of scientists from the New York Stem Cell Foundation (NYSCF) Research Institute reported Friday in Stem Cell Research and Therapy that they have made valuable progress toward creating clinical-grade cells for treatment ...

Health

Childhood body composition may influence future lung health

How well people breathe as adults may depend on the amount of fat mass and lean muscle mass they have as children, according to a new study led by scientists from the Barcelona Institute for Global Health (ISGlobal), a center ...

Diseases, Conditions, Syndromes

Nine cases of wound botulism ID'd in injection drug users

(HealthDay)—Among persons who inject drugs, nine cases of wound botulism were identified in Southern California from September 2017 to April 2018, according to research published in the Jan. 4 issue of the U.S. Centers ...

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Muscle

Muscle (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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