Muscle Size and Arrangement of Muscle Fascicles

Muscle Size and Arrangement of Muscle Fascicles - Muscle...

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Muscle Size and Arrangement of Muscle Fascicles The size of a muscle influences its capabilities. When a muscle fiber (muscle cell) contracts, it can  shorten to nearly half its relaxed length. The longer a muscle fiber, the greater range of movement it  can generate. In contrast, an increase in the number of muscle fibers increases the strength of the  contraction. Muscle fibers are grouped into fascicles, which in turn are grouped to form a muscle. The size  (length) and number of fascicles determine the strength and range of movement of a muscle.  Common fascicle patterns include the following:  Parallel fascicles  have their long axes parallel to each other. Parallel fascicles can be  flat or straplike, or they can bulge at their bellies and be spindle-shaped or fusiform. 
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This note was uploaded on 11/10/2011 for the course PT 101 taught by Professor Staff during the Spring '10 term at Texas State.

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