Which listed muscle has no functional description provided in the material?

• A. Temporalis
• B. Sternohyoid
• C. Masseter
• D. Medial Pterygoid

Answer: (B)

In this context, the material focuses on muscles that move the jaw and influence occlusion. The sternohyoid is not a primary jaw mover; it’s an infrahyoid muscle that depresses the hyoid bone after swallowing, a function not tied to producing jaw closure or grinding. Because of that, there isn’t a described role for it in mandibular movement within the occlusal-focused material. The other muscles listed are classic jaw elevator muscles: temporalis elevates (and retracts) the mandible; masseter elevates the mandible and contributes to protrusion; medial pterygoid elevates and assists in protrusion and grinding movements. So sternohyoid is the one with no functional description in this context.