Synergists help steady movements and fixators help stablize the prime movers origin.
Agonist muscles are the primary muscles responsible for producing movement. However, synergist muscles are helper muscles that assist the agonist in executing a particular movement. Synergists help stabilize the movement and control the direction in which the force is exerted.
prime movers : muscle that initiate a particular movement synergism : muscles that have the same action of the prime mover antagonist : muscles that come into play to oppose a certain movement
The primary movement is called the Prime mover or Agonist
Muscles that cause primary movement are called agonist muscles. These muscles contract to produce the desired movement, while antagonists relax to allow the action to occur. For example, during a bicep curl, the biceps act as the agonist, facilitating the lifting of the weight.
The two functional characteristics used to classify muscles into classes are agonist and antagonist. Agonist muscles are responsible for causing movement, while antagonist muscles work in opposition to the agonist to help control the movement.
When two muscles work together, it is referred to as "synergism." In this process, the muscles collaborate to produce a specific movement or stabilize a joint, enhancing the efficiency and effectiveness of the action. Synergistic muscles often assist the primary muscle responsible for the movement, known as the agonist, while the antagonist muscles relax to allow for smooth motion.
in the arm: bicep contracts (agonist) triceps relax (antagonist) in the leg: hamstrings contract (agonist) quadriceps relaxes (antagonist) remember the agonist is the muscle "agonising" to do the work - like pulling the joint.
When kicking a ball, the primary agonist muscle is the quadriceps, which extends the knee to propel the leg forward. The hamstrings act as the antagonist muscles, controlling the movement and preventing hyperextension of the knee. Additionally, the hip flexors assist in lifting the leg, while the gluteal muscles stabilize the hip during the kick.
The agonist in the hamstring muscles, primarily when flexing the knee, is the hamstring group itself, which includes the biceps femoris, semitendinosus, and semimembranosus. These muscles contract to produce the movement, while the quadriceps act as the antagonist, opposing the action of knee flexion. The hamstrings also assist in hip extension when the hip is flexed.
Deltoid
The agonist muscle
The agonist muscle