What is Fixator Muscles ?

What is Fixator Muscle? What is a fixator muscle definition? Fixators are the muscle,  The muscle which fixes the attachments of the agonists, antagonists, and synergists. What is an example of a fixator muscle? In the human body, we have so many examples of fixator muscles. 

The muscles attached to the shoulder girdle to the trunk acts as the fixator for the deltoid action. Fixators are not only fixing the bony component while the movement of agonists, antagonists, or synergists and also have dynamic properties.

The fixator muscles are which that stabilizes the origin of the agonist and the joint that the origin spans (moves over-prime movers) in order to help the agonist function most effectively with fewer efforts.  For the bicep curl, this would be the rotator cuff muscles, the ‘guardians of the shoulder joint’.  The majority of fixator muscles are found working around the hip and shoulder joints.

Many muscles are attached to more than one bone via tendons. When this happens the muscles are said to be 'multiarticulate' or 'multijoint muscles'. When these muscles contract for performing, they tend to move both bones to which they are attached for effective movements. This would, of course, make everyday movements quite impossible to perform.

What is Fixator Muscles ?

It is not only having the isometric contraction but also has isotonic in altering the pattern of movement. Fixator work is very much ( nearly 75 % ) needed in normal day-to-day activities. Example: Threading in the needle, throwing the ball.

as we can see in the upper figures. the deltoid is acting as a fixator muscle. while flexing the elbow, the Biceps brachii and brachialis acting as Prime movers, and the triceps are acting antagonistically. here deltoid is working to stabilize the whole movement isometrically. this suggests the work of fixator muscle. it actully fixing the motion around joints.


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