A tendon.
The immovable part of muscle bundles is called the origin. This point is where the muscle attaches to a stationary bone or structure, providing a stable anchor during muscle contraction. In contrast, the other end of the muscle, known as the insertion, attaches to a movable bone, allowing for movement when the muscle contracts.
Origin.originOriginorigin
The origin refers to the muscle attachment that is more stable. The tendon that attaches the muscle to its origin can be called the origin tendon,
the place where the muscle begins.
Reverse origin and insertion refers to the changing of the attachment points of a muscle. When the origin and insertion of a muscle are reversed, the muscle's previous insertion point now becomes the origin, and vice versa. This can have an impact on the muscle's function and movement.
The fixator of a muscle stabilizes the muscle at the point of origin.
The origin of a muscle is where the muscle starts ("the starting point"). The insertion of a muscle is where the muscle ends ("the ending point"). Also, the insertion of the muscle is what moves a lot (contrary of the origin where the muscle mostly stays stationary).
Muscle attaches to a non-moving bone at the muscle's origin.
Semimembranosus muscle
Origin is typically the proximal attachment of a muscle because it is the least moveable. The distal attachment is where a muscle inserts.
The muscle of the arm with three heads or points of origin is the triceps brachii.
origin is where the muscle is attached and is the "starting point" where the insertion is where the muscle ends "the ending point" the insertion of the muscle is what moves, while the origin in most cases stays still.