Which muscle is primarily responsible for sealing the velopharyngeal port during swallowing?

• A. Levator veli palatini
• B. Tensor veli palatini
• C. Musculus uvulae
• D. Palatoglossus

Answer: (A)

The main action needed to seal the velopharyngeal port during swallowing is elevating the soft palate so it meets the posterior pharyngeal wall, creating a tight barrier between the oral and nasal cavities. The muscle that does this most effectively is the levator veli palatini, which lifts the soft palate upward and backward to close the opening.

Other muscles play supporting roles but aren’t the primary seal. The tensor veli palatini tenses the palate and helps with opening the auditory tube rather than sealing the port. The musculus uvulae can raise the uvula to fine-tune the seal, but it’s not the main driver. Palatoglossus influences the position of the tongue and the arches rather than directly sealing the velopharyngeal port.