 In the pharynx, it joins with the salpingopharyngeus muscles and is inserted.A few fibers of palatopharyngeus muscle sweep backward under cover of the Passavant's ridge and form a U-shaped sling of palatopharyngeal sphincter.When the soft palate is elevated it comes in contact with ridge, the two together closing pharyngeal isthmus between nasopharynx and oropharynx