Unexpected Organization: Newly Discovered Muscle Fiber Structure — Researchers have just made |
Parophidion vassaliResearchers have just made the unexpected discovery of a novel organization of muscle fibers in, a fish that lives in the Mediterranean Sea and, like many fish, uses specialized muscles to produce sounds. This is an important discovery that could well change our understanding of muscle contraction.
Subsequent studies have led to increasingly clear descriptions, including the identification of the different molecules that make up the muscle and an explanation of how it works, in particular the model of muscle contraction proposed by the biophysicist Andrew Huxley in 1957. Over the last 300 years, numerous studies have extended the representation of muscle fiber organization to different taxa.
Each myofibril subdivides into two branches at each sarcomere, one connecting to the myofibril above and the other connecting to the myofibril below . This new muscle fiber design could result in a muscle that contracts rapidly while retaining strength. The paucity of myofibrils and the high volume occupied by the sarcoplasmic reticulum are in favor of fibers that contract rapidly.
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