Muscle Origin




Muscle Origin: The proximal (toward the center of the body) attachment of a muscle. The origin is determined by the bone that is least movable by the contracting muscle that is attaching to it. But it is also considered to be the "proximal" attachment that is closest to the midline or center of the body. The origin of a muscle normally remains relatively fixed while the insertion typically moves toward the origin.

Further Explanation:

The origin and insertion of a muscle is determined by considering the affect of the muscle's contraction on the bones it attaches to. Or, in other words, we must consider how much much the bones move to determine whether an 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.

Each skeletal muscle is usually fastened to an (mostly) immovable or fixed part on one end and to a moveable part on the other end.

The origin is determined by the bone that is least movable by the contracting muscle that is attaching to it. But it is also considered to be the "proximal" attachment that is closest to the midline or center of the body.

This page created 06 Mar 2012 00:08
Last updated 01 Mar 2016 19:50

© 2016 by Eric Troy and Ground Up Strength. All Rights Reserved. Please contact for permissions.