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What is the primary function of the sternocleidomastoid muscle?

Practice Questions

Q1
What is the primary function of the sternocleidomastoid muscle?
  1. Flexion of the neck
  2. Rotation of the head
  3. Elevation of the shoulder
  4. Extension of the neck

Questions & Step-by-Step Solutions

What is the primary function of the sternocleidomastoid muscle?
  • Step 1: Identify the sternocleidomastoid muscle. It is located on each side of the neck.
  • Step 2: Understand that this muscle connects the sternum (breastbone), clavicle (collarbone), and mastoid process (a bony area behind the ear).
  • Step 3: Learn that when the sternocleidomastoid muscle contracts, it can cause the head to turn to the opposite side.
  • Step 4: Recognize that it also helps to bend the neck forward, which is called flexing the neck.
  • Step 5: Conclude that the primary function of the sternocleidomastoid muscle is to rotate the head and flex the neck.
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