The end of a muscle that is attached to a relatively immovable part is the
The end of a muscle which is nearer to the midline of the body, which is more proximal, or less movable is called the origin. The end of a muscle furthest from the dorsal midline, more distal or more movable is called the insertion.As the muscles are described, the origin and insertion will be identified; try not to simply memorize which is which.he end of a muscle furthest from the dorsal midline, more distal or more movable is called the insertion. As the muscles are described, the origin and insertion will be identified; try not to simply memorize which is which.