Which muscle elevates the eyebrows?

• A. Buccinator
• B. Orbicularis oculi
• C. Zygomaticus major
• D. Frontalis (frontal belly of the occipitofrontalis)

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the function of each muscle listed. The Buccinator muscle is primarily involved in compressing the cheek, important for actions like blowing or chewing.
2. Step 2: Recognize that the Orbicularis oculi muscle is responsible for closing the eyelids, not elevating the eyebrows.
3. Step 3: Know that the Zygomaticus major muscle is involved in elevating the corners of the mouth, contributing to smiling.
4. Step 4: Identify the Frontalis muscle (frontal belly of the occipitofrontalis) as the muscle that elevates the eyebrows, which helps in expressions like surprise.
5. Step 5: Conclude that among the options given, the Frontalis is the correct muscle responsible for eyebrow elevation.