Antagonist muscles are muscles that counteract the action of agonist muscles.
Some examples of antagonist muscles are:
AN example of a synergistic muscle pair would be the biceps brachii and the brachialis muscle that work together to flex the forearm. A muscle antagonistic to those two would be the triceps brachii which functions to extend the forearm.
You can't really define a muscle as antagonistic since it's relative to another muscle known as the agonist, and this is relative to the movement. For example: in the flexion of the elbow joint the biceps brachii muscle is the agonist so the triceps brachii is the antagonist, but in extension of the elbow joint the triceps brachii is the agonist and the biceps brachii is the antagonist.
In case you don't understand, the agonist is the muscle which contracts (does the work, 'agonises') and the antagonist is the muscle which relaxes as a consequence.
Examples of antagonistic muscle pairs are:
-biceps and triceps located in the arm
-quadriceps and hamstrings located in the legs
An antagonist muscle is a muscle that works opposite or against another muscle.
Bicep Brachii
Triceps during a biceps curl.
antagonist muscle
A antagonist muscle is a muscle that opposes the action of another muscle. The Triceps Brachii is the antagonist of the Biceps Brachii.
antagonist
The antagonist is your mom
A antagonist muscle is a muscle that opposes the action of another muscle. The Triceps Brachii is the antagonist of the Biceps Brachii.
The agonist (not angonist) muscle are the Biceps Brachii and the Brachioradialis and the antagonist is the Triceps Brachii.
The triceps brachii is the antagonist to the biceps brachii.
the bicep
Subscapularis muscle
Platysma muscle
the antagonist of adduction is the pectoralis major
when one muscle is against and opposes another muscle