Muscle Insertion: The distal (away from the center of body) attachment of a muscle, which is usually a relatively more moveable segment than that of the origin. The origin and insertion of a muscle is determined by considering the affect of the muscle's contraction on the bones it attaches to. In other words, how much the bones move determine whether this attachment is considered the origin or insertion. However sometimes the relative location of the attachment to the midline or center of the body is also considered. For certain muscles that have various origins and insertions, some of which are not even on bones, this can be difficult. But most muscles can be easily determined.
This page created 05 Mar 2012 23:59
Last updated 06 Mar 2012 00:09