What is the function of the sternocleidomastoid muscle 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.
What does the sternocleidomastoid control?
The sternocleidomastoid is a superficially located neck muscle that plays an important role in tilting your head and turning your neck, as well as other things. It courses from the back of your head and attaches to your breastbone and collar bone.
How many Sternomastoid muscles are in the human body?
The sternocleidomastoid muscle (SCM) is one of more than 20 pairs of muscles that act on the neck. SCM has a dual-innervation and multiple functions.
Where is sternocleidomastoid muscle?
neck
The sternocleidomastoid (even typing it is a challenge) is a muscle in the neck region, often classified with the lateral cervical muscles. If you put your hands on either side of your neck, a little bit closer to the back, chances are you’re touching the sternocleidomastoid, or SCM.
Which of the following actions is performed by sternocleidomastoid?
Sternocleidomastoid muscle
| Sternocleidomastoid | |
|---|---|
| Actions | Unilaterally: contralateral cervical rotation, ipsilateral cervical flexion Bilaterally: cervical flexion, elevation of sternum and assists in forced inhalation. |
| Identifiers | |
| Latin | Musculus sternocleidomastoideus |
| TA98 | A04.2.01.008 |
What is the unilateral action of the sternocleidomastoid?
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 role of the sternocleidomastoid in respiration during exercise?
The sternocleidomastoid muscle (SCM), which is responsible for the mechanical action in the majority of the head movements, is also considered an accessory muscle for respiration.
What is the role of the sternocleidomastoid during respiration during exercise?
The sternocleidomastoid (SCM) and the anterior, middle and posterior scalene muscles are considered secondary breathing muscles. The SCM attaches to the sternum and clavicle, while the scalene group attach to the first and second rib. All assist in elevating the rib cage during inhalation.
What is the primary action of the masseter?
The masseter muscle is one of the four muscles responsible for the action of mastication (chewing). When the masseter contracts it causes powerful elevation of the mandible causing the mouth to close.
What are Sternomastoid muscles?
The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. This muscle binds the skull to the sternum and clavicle.
Which of the following is an action of the sternocleidomastoid?
The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles. The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. The sternocleidomastoid is innervated by the accessory nerve….Sternocleidomastoid muscle.
| Sternocleidomastoid | |
|---|---|
| FMA | 13407 |
| Anatomical terms of muscle |
How to stretch the sternocleidomastoid?
Stand with your feet about 4 feet apart.
What does sternocleidomastoid muscle do?
The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles. The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck.
What is the insertion of sternocleidomastoid muscle?
What is the origin insertion and action of Sternocleidomastoid? The SCM’s origins are the sternum and clavicle and its insertion is the mastoid process behind the ear. The actions of the SCM are to flex and rotate the head. It does this by contracting both SCMs together or one alone, respectively.
What is the sternocleidomastoid muscle?
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). It is a long, bilateral muscle of the neck, which functions to flex the neck both laterally and anteriorly, as well as rotate the head contralaterally to the side of contraction.