Neuroscience

What happens in the bodies of ALS patients?

Amyotrophic lateral sclerosis (ALS) is an incurable disease of the central nervous system. In most cases, ALS is fatal within a short period following diagnosis. However, people sometimes live with the disease for decades, ...

Medical research

Development of a technology to produce dorsal cortical neurons

Korea Brain Research Institute (KBRI, President Pann Ghill Suh) announced on Mar. 4 that its research team led by principal researcher Yoichi Kosodo has developed a technology to mass produce cerebral cortex neurons utilizing ...

Medical research

New medication gives aging mice bigger muscles

It is common knowledge that as people grow older they lose muscle mass and bone. Researchers from Aarhus University, Denmark, working together with researchers at Erasmus Medical Center in Rotterdam, have now studied a new ...

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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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