In the lateral cervical triangle, which border is formed by the sternocleidomastoid muscle?

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Multiple Choice

In the lateral cervical triangle, which border is formed by the sternocleidomastoid muscle?

Explanation:
In the lateral cervical triangle, the sternocleidomastoid forms the front edge that separates this region from the rest of the neck. The muscle runs from the sternum and clavicle up to the mastoid process, creating the anterior border of this triangle. The posterior boundary is formed by the trapezius, and the lower boundary by the clavicle, so the SCM is specifically the anterior border.

In the lateral cervical triangle, the sternocleidomastoid forms the front edge that separates this region from the rest of the neck. The muscle runs from the sternum and clavicle up to the mastoid process, creating the anterior border of this triangle. The posterior boundary is formed by the trapezius, and the lower boundary by the clavicle, so the SCM is specifically the anterior border.

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