The non-moving portion of the muscle attached to bone or other fixed is the?

The non-moving portion of the muscle attached to bone or other fixed is the origin. The origin is the point of attachment of a muscle to a relatively immobile structure, such as a bone. The other end of the muscle, which is attached to the movable structure (usually a bone), is called the insertion. When a muscle contracts, it pulls the insertion toward the origin, causing movement at the joint.