What is the antagonist muscle of the sternocleidomastoid?

What is the antagonist muscle of the sternocleidomastoid?

The sternocleidomastoid muscles help to flex the neck. Their antagonists are the longus capitis and the rectus capitis anterior.

What is the synergist of the sternocleidomastoid?

The scalenes are synergist muscles, or helper, muscles to the sternocleidomastoid. They assist the SCM in turning and tilting both the head and neck.

What are agonist and antagonist muscles?

Muscles are attached to bones by tendons. Muscles that work like this are called antagonistic pairs. In an antagonistic muscle pair as one muscle contracts the other muscle relaxes or lengthens. The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist.

What is the function of Sternocleidomastoid?

When acting together it flexes the neck and extends the head. When acting alone it rotates to the opposite side (contralaterally) and slightly (laterally) flexes to the same side. It also acts as an accessory muscle of inspiration.

Which is an antagonist and which is a synergist?

Triceps brachii is the antagonist and brachialis is a synergist with biceps brachii. As we begin to study muscles and their actions, it’s important that we don’t forget that our body functions as a whole organism.

Which is a muscle that acts as a synergist?

We describe muscles that work together to create a movement as synergists. For example, iliacus, psoas major, and rectus femoris all can act to flex the hip joint.

Which is an example of an antagonist muscle?

We could also say that the antagonist is the main muscle that does the opposite of the action that it is resisting. For example, we could say that gluteus maximus is an antagonist of the primary hip flexor, iliopsoas because gluteus maximus is a hip extensor.

Which is the main muscle that resists a movement?

Although it does not work alone, iliopsoas does more of the work in hip flexion than the other muscles that assist in that action. In order to maintain a balance of tension at a joint we also have a muscle or muscles that resist a movement. The main muscle that resists a movement is called the antagonist.