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drawing the lip downward. mandible bone. lower lip. epicranius. raising eyebrows, wrinkling forehead, pulling scalp posteriorly. frontal belly, occipital belly, temporal bone. skin of brow, epicranial aponeurosis. lateral pterygoid. protruding the mandible, opening the jaw, moving the mandible outward and right and left.
30 paź 2023 · The muscle origin often describes the more proximal attachment point of the muscle, while the muscle insertion point refers to the distal attachment. In our cheat sheets, you’ll find the origin(s) and insertion(s) of every muscle.
Origin: Manubrium and clavicle. Insertion: Mastoid process of temporal bone. Action: Bilateral contraction flexes head at neck; Unilateral contraction bends neck towards shoulder or laterally rotates head.
The origin of a muscle is the more stationary attachment point, while the insertion is the more movable attachment point. The location of a muscle's origin and insertion determines the type of movement it can produce, such as flexion, extension, abduction, or adduction.
If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion. The triceps brachii happens to have four points of attachment: one insertion on the ulna and three origins (two on the humerus and one on the scapula).
Each muscle has an origin and an insertion point. Muscle origins and insertions can be described as the anchor end [ origin ] and the most mobile end [ insertion ] when the muscle shortens. A muscle’s origin is usually at the attachment of its tendon to the bone with greater mass and stability.
