Terms in this set (4)
- Synergist. is a muscle that contacts and works along with the agonist to produce the desired movement.
- Neutralizing/Counteracting Synergists. muscles that contract to prevent unwanted movements produced by the prime mover.
- Conjoint Synergists.
- Stabilizing/Fixating Synergists.
What does synergist mean in muscles?
Synergist muscles also called fixators, act around a joint to help the action of an agonist muscle. Synergist muscles can also act to counter or neutralize the force of an agonist and are also known as neutralizers when they do this.
What is a direct synergist?
Direct synergists act on the same reactive systems of the body, such as the simultaneous influence of two adrenomimetic substances. Indirect synergists exert the same end effect but differ in their mechanisms of action.
Are specialized synergists?
Fixators. Fixators are specialized synergists; they hold a bone still or stabilize the origin of a prime mover so all tension can be used to move the insertion bone.
Is the biceps brachii a synergist?
The biceps brachii is on the anterior side of the humerus and is the prime mover (agonist) responsible for flexing the forearm. The biceps brachii has two synergist muscles that assist it in flexing the forearm. Both are found on the anterior side of the arm and forearm.
What are prime movers and synergists?
Prime movers and antagonists are often paired up on opposite sides of a joint, with their prime mover/antagonist roles reversing as the movement changes direction. Synergists. One or more synergists are often involved in an action. Synergists are muscles that assist the prime mover in its role.
What muscle protracts the scalp?
Occipitofrontalis muscle
| Origin | Frontal belly (frontalis): Skin of eyebrow, muscles of forehead Occipital belly (occipitalis): (Lateral 2/3 of) superior nuchal line |
|---|---|
| Insertion | Epicranial aponeurosis |
| Action | Frontal belly: Elevates eyebrows, wrinkles skin of forehead Occipital belly: Retracts scalp |
What are helping synergistic muscles?
This means that muscles that cover a wide number of joints may be unable to stretch far enough to move all of the joints. When this occurs, synergistic muscles located in that region of the body help the primary muscle to complete the movement. Synergistic muscles that serve this function are known as helping synergists.
What is the difference between antagonistic and synergistic pairs?
One member of the pair contracts while the other relaxes. Reverse motions require antagonistic pairs located on the opposite side of a joint or bone. Not all muscles are part of an antagonistic pair, such as the deltoids. Synergistic muscles are required for many types of movements, Wikipedia notes.
Why are synergistic muscles called neutralizers?
Synergistic muscles act as movable joints; they are sometimes referred to as neutralizers because they help to cancel out the motion of agonist muscles. Wikipedia explains that agonist muscles often occur in pairs, such as the biceps and triceps.
