Harman Patil (Editor)

Palatopharyngeus muscle

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Covid-19
Artery  Facial artery
Palatopharyngeus muscle
Origin  Palatine aponeurosis and hard palate
Insertion  Upper border of thyroid cartilage (blends with constrictor fibers)
Nerve  Pharyngeal branch of vagus nerve
Actions  Pulls pharynx and larynx upward
Latin  Musculus palatopharyngeus

The palatopharyngeus (palatopharyngeal or pharyngopalatinus) muscle is a small muscle in the roof of the mouth.

Contents

It is a long, fleshy fasciculus, narrower in the middle than at either end, forming, with the mucous membrane covering its surface, the palatopharyngeal arch.

Structure

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 laterally 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.

    Innervation

    Motor innervation of this muscle is provided through the pharyngeal plexus of the CN X (vagal nerve), SVE fibers.

    Function

    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 from passing into the nasopharynx; at the same time, the palatopharyngeus muscles form an inclined plane, directed obliquely downward and backward, along the under surface of which the bolus descends into the lower part of the pharynx.

    References

    Palatopharyngeus muscle Wikipedia


    Similar Topics
    Shaukeen
    Uzi Rubin
    Nick Graham (Australian footballer)
    Topics
     
    B
    i
    Link
    H2
    L