What is the action of the sternocleidomastoid?

What is the action of the 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.

What is the unilateral action of the sternocleidomastoid muscle?

A unilateral contraction of the sternocleidomastoid muscle flexes the cervical vertebral column to the same side (lateral flexion) and rotates the head to the opposite side.

What is the action of the sternocleidomastoid quizlet?

The sternocleidomastoid muscle is a two-headed neck muscle, which true to its name bears attachments to the manubrium of sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). Flexes neck ; rotates head.

How do you exercise the sternocleidomastoid?

Sternocleidomastoid pain exercises and stretches

  1. Sit or stand facing forward.
  2. Exhale and slowly turn your head to the right, keeping your shoulders relaxed and down.
  3. Inhale and return to center.
  4. Exhale and turn to look over your left shoulder.
  5. Do 10 rotations on each side.

How to get rid of sternocleidomastoid muscle pain?

The following are potential sternocleidomastoid muscle pain symptoms that depend on the extent of the injury. Perhaps the best form of treatment, massage can be done yourself or by an experienced massage therapist. By using your thumb and forefingers, squeeze the muscles of the sternocleidomastoid gently to help them stretch and relax.

How to stretch the sternocleidomastoid muscle in the neck?

Helps to lengthen the sternocleidomastoid muscle by stretching it. Start by retracting your neck to allow for your neck and spine to naturally align Now bend your neck to the left, bringing your ear to your shoulder When you feel the stretch on the right sternocleidomastoid, hold for 20 to 30 seconds

How are the sternomastoid and cleidomastoid bellies related?

The two separate sternomastoid and cleidomastoid bellies further subdivide the anterior triangle into a supernumerary triangle. This extra triangle can also be considered as an extended lesser supraclavicular fossa which normally separates the sternal and clavicular heads of origin of SCM.

What are the symptoms of a sternocleidomastoid?

Thus, it makes sense to examine it on both sides of the neck. In addition to the pain described above, trigger points in the sternocleidomastoid can also contribute to the following symptoms and ailments…. Feeling of soreness on the side of the neck. Watering eye on the affected side.