The muscles that assist in depressing the mandible belong to which group?

• A. Suprahyoid Muscles
• B. Anterior Digastric
• C. Mylohyoid
• D. Geniohyoid

Answer: (A)

The action of depressing the mandible is carried out by muscles that lie above the hyoid bone and connect the mandible or floor of the mouth to the hyoid. These are the suprahyoid muscles. When they contract (for example, the anterior belly of the digastric along with the mylohyoid and geniohyoid), they pull on the hyoid and jaw in a way that lowers the mandible to open the mouth. The stylohyoid is also part of this group, mainly helping to elevate the hyoid during swallowing, but it’s still categorized with the suprahyoid muscles.

So, the best group name for the muscles that assist in depressing the mandible is the suprahyoid muscles. The other options refer to individual muscles that belong to this same group, but they don’t name the group itself.