muscle is a long, fleshy fasciculus, narrower in the middle than at either end, forming, with the mucous membrane covering its surface, the palatopharyngeal arch
Origin and insertion
It is separated from the palatoglossus muscle
by an angular interval, in which the palatine tonsil
is lodged. It arises from the soft palate, where it is divided into two fasciculi by the levator veli palatini
and musculus uvulae
- The posterior fasciculus lies in contact with the mucous membrane, and joins with that of the opposite muscle in the middle line.
- The anterior fasciculus, the thicker, lies in the soft palate between the levator and tensor veli palatini muscles, and joins in the middle line the corresponding part of the opposite muscle.
Passing lateralward and downward behind the palatine tonsil, the palatopharyngeus joins the stylopharyngeus
and is inserted with that muscle into the posterior border of the thyroid cartilage, some of its fibers being lost on the side of the pharynx
and others passing across the middle line posteriorly to decussate with the muscle of the opposite side.
The palatine velum
is slightly raised by the levator veli palatini
and made tense by the tensor veli palatini
; the palatopharyngeus muscles, by their contraction, pull the pharynx
upward over the bolus
of food and nearly come together, the uvula
filling up the slight interval between them.
By these means the bolus is prevented... Read More