Muscle Size and Arrangement of Muscle FasciclesThe 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.
This is the end of the preview.
access the rest of the document.