Name the superficial neck muscles that serve as landmarks and lie lateral to the thyroid.

• A. Sternocleidomastoid muscles
• B. Platysma
• C. Omohyoid
• D. Scalene

Answer: (A)

The key idea is identifying superficial neck muscles that act as clear surface landmarks and where they lie in relation to the thyroid. The sternocleidomastoid stands out as a prominent, superficial muscle that runs along the side of the neck from the sternum and clavicle up to the mastoid process. Because it forms the lateral boundary of the neck, it sits beside (lateral to) the thyroid gland, making it a reliable landmark when locating the thyroid region. The thyroid itself sits medial to this muscle, within the deep visceral compartment of the neck, so using the sternocleidomastoid helps orient you to the thyroid area.

The platysma is also a superficial neck muscle, but it lies across the anterior neck rather than laterally, so it isn’t the lateral landmark associated with the thyroid. The omohyoid is a strap muscle that crosses the neck as well, but it is deeper and not the primary superficial landmark for the thyroid. The scalene muscles lie more laterally and deeper in the neck and are not typically used as superficial landmarks for the thyroid region.