What is the primary function of the suprahyoid muscles during swallowing?

The primary function of the suprahyoid muscles during swallowing is to pull the hyoid up and backward. These muscles, which include the digastric, mylohyoid, and stylohyoid, play a crucial role in the swallowing process by assisting in the elevation of the hyoid bone. This elevation is essential for the proper movement of the larynx and allows for the closure of the airway, thereby preventing food and liquids from entering the trachea.

During swallowing, the upward movement of the hyoid bone helps in directing the food bolus downward through the pharynx and into the esophagus. The coordinated action of these muscles ensures that the swallowing mechanism is efficient and safe, allowing for effective propulsion of the bolus while protecting the airway. This action is vital for proper swallowing and is central to the overall function of the suprahyoid muscles in this context.