Passavant’s ridge

Passavant's ridge^[1] is a mucous elevation situated behind the floor of the nano-pharynx.

Anatomy

The ridge is formed by the palatial-pharyngeal sphincter. Palatial-pharyngeal muscle originates from the upper surface of palatial Maurois pone-by anterior and posterior fascicle, which are separated by the insertion of levator veli palatini. Both fasciculi join laterally to form a single muscle that passes downward and backward under cover of the palato pharyngeal arch. In the pharynx, it joins with the salpingo pharyngeus muscles and is inserted. A few fibres of palato pharyngeus muscle sweep backward under cover of the passavant's ridge and form a U-shaped sling of palatopharyngeal sphincter.

References

1. "Passavant’s Ridge - Anatomy and Pathology | Kenhub". Kenhub. Retrieved 2016-04-23.