Which muscle is primarily associated with expressions of sarcasm and is located near the lips?

• A. Playsma
• B. Quadratus Labii Inferioris
• C. Mentalis
• D. Orbicularis Oculi

Answer: (B)

The key idea is which facial muscle lowers the lower lip to create a sneer or sarcasm: depressor labii inferioris, also called quadratus labii inferioris. This muscle runs from the jaw to the lower lip and when it contracts, it pulls the lower lip downward and outward. That specific action gives the upturned or sneering look characteristic of sarcasm, and it sits right near the lips, making it the primary muscle for this expression.

In contrast, other muscles here do different jobs: mentalis lifts and protrudes the lower lip and creases the chin for pout or doubt; platysma tenses the neck skin; and orbicularis oris encircles the mouth to close and purse the lips.