Deglutition | Muscles of the Palate [OINAs]

The video tutorial provides an in-depth look at the anatomy and function of the pharyngeal constrictors, oral and nasal cavities, and the swallowing mechanism. It explains the roles of various muscles, including those of the soft palate, tongue, and uvula, in facilitating swallowing and preventing food from entering the nasal cavity or trachea. The tutorial also covers the innervation and blood supply of these muscles, highlighting the importance of the vagus nerve and other cranial nerves.

What is the primary function of the pharyngeal constrictors?

• To move food from the oral pharynx to the esophagus

• To aid in breathing

• To produce speech

• To regulate blood flow

How does the soft palate prevent food from entering the nasal cavity during swallowing?

• By constricting the esophagus

• By lowering the larynx

• By elevating and closing the oral pharyngeal isthmus

• By closing the oral cavity

What role does the epiglottis play during swallowing?

• It opens the trachea

• It covers the trachea to prevent food entry

• It elevates the soft palate

• It constricts the esophagus

Which muscle is responsible for elevating the pharynx during swallowing?

• Palatopharyngeus

• Styloglossus

• Genioglossus

• Masseter

What is the primary action of the salpingopharyngeus muscle?

• To tense the soft palate

• To constrict the esophagus

• To elevate the pharynx

• To depress the larynx

Which nerve primarily innervates the stylopharyngeus muscle?

• Glossopharyngeal nerve

• Vagus nerve

• Trigeminal nerve

• Facial nerve

What is the main function of the levator veli palatini muscle?

• To constrict the pharynx

• To tense the soft palate

• To elevate the soft palate

• To depress the tongue

Which muscle helps in narrowing the oropharyngeal isthmus during swallowing?

• Genioglossus

• Styloglossus

• Hyoglossus

• Palatoglossus

What is the clinical significance of uvular deviation?

• It indicates a problem with the facial nerve

• It suggests dysfunction of the vagus nerve

• It shows a blockage in the nasal cavity

• It implies a constriction in the esophagus

Which artery supplies blood to the palatoglossus muscle?

• Lingual artery

• Ascending pharyngeal artery

• Maxillary artery

• Facial artery